Infant calming/sleep-aid device and method of use

Abstract

An infant calming/sleep-aid device includes a main moving platform that moves in a reciprocating manner and an actuator that drives the reciprocating movement of the main moving platform. The moving head platform is linked to the main moving platform and at least one of a motion sensing device and a sound sensing device are either at or proximate to a moving head platform that is pivotally linked to the main moving platform. A logic circuit links at least one of the motion and sound sensing devices of the infant calming/sleep aid-device to the main moving platform whereby signals detected modulate movement of the main moving platform. A sound generating device is linked to the logic circuit.

Claims

1. An infant calming/sleep-aid device, comprising: a rigid base; a movement linkage or bearing extending from the rigid base; a platform mounted on the movement linkage or bearing; and an actuation assembly that controls movement of the platform about the movement linkage or bearing relative to the rigid base to rotate the platform in an reciprocating manner, the actuation assembly including a drive motor, wherein the reciprocating rotation is on an axis of rotation that intersects the platform and extends orthogonal to a major plane of the platform, and a control system operable to control operations of the actuation assembly, wherein the control system is configured to receive data signals from one or more sensors comprising at least a sound sensing device configured to detect sounds of an infant supported on the platform, wherein, if the control system determines that the infant is in a first crying state, utilizing one or more first data signals comprising at least sound data detected by the sound sensing device, the control system is configured to initiate a calming reflex operational mode in which the control system causes the actuation assembly to move the platform in a reciprocating rotation within a frequency range of between 2 and 4.5 cycles per second and an amplitude range corresponding to a circumferential distance of between 0.2 inches and 1.0 inches taken at a radial distance from the axis of rotation configured to correspond to a center of a head of the infant.

2. The infant calming/sleep-aid device of claim 1, further comprising: a second platform comprising a moving head platform; and a second movement linkage comprising a head movement linkage or bearing mounted to the platform linking the moving platform to the second platform.

3. The infant calming/sleep-aid device of claim 1, further comprising a sound generating device that includes a speaker for generating sound directed to the infant, wherein, in the calming reflex operational mode, the control system further causes the sound generating device to direct sound to the infant.

4. The infant calming/sleep-aid device of claim 1, wherein the sound sensing device comprises at least one microphone.

5. The infant calming/sleep-aid device of claim 1, further comprising a head rest positioned above the platform, wherein the head rest includes a gel.

6. The infant calming/sleep-aid device of claim 1, further comprising a secure swaddling sack within which to swaddle an infant, and wherein the secure swaddling sack is securable to the platform to secure a position of the infant when swaddled within the secure swaddling sack with respect to the platform.

7. The infant calming/sleep-aid device of claim 1, wherein the one or more sensors further comprise a motion sensing device that detects motion of the infant when supported on the platform, and wherein the first data signals further comprise motion corresponding to perturbations of the platform detected by the motion sensing device caused by the infant during a reciprocating rotation of the platform prior to initiation of the calming reflex operational mode.

8. The infant calming/sleep aid device of claim 1, wherein the control system is configured to reduce the reciprocating rotation in a stepwise fashion if the control system determines, utilizing data signals received from the one or more sensors, that the infant is being soothed by the reciprocating rotation of the platform.

9. The infant calming/sleep-aid device of claim 1, wherein the control system is further configured to control the reciprocating rotation of the platform utilizing age of the infant as variable, and wherein at a predetermined age of the infant, the control system is configured to reduce intensity of the reciprocating rotation to wean the infant off the reciprocating rotation of the device.

10. The infant calming/sleep-aid device of claim 1, wherein the control system controls the reciprocating rotation utilizing at least one variable selected from weight of the infant, age of the infant, a duration of detected sound made by the infant, and a duration of detected motion of the infant.

11. The infant calming/sleep-aid device of claim 1, wherein the actuation assembly is configured to reciprocally rotate the platform on the axis of rotation that is configured to be positioned to intersect an infant when supported on the platform.

12. The infant calming/sleep-aid device of claim 1, wherein in a soothing operational mode, the control system controls the frequency of reciprocating rotation within a range of between 0.5 and 1.5 cycles per second with a corresponding amplitude of the reciprocating rotation at a location corresponding to the center of the head of the infant when positioned on the platform that is in a range of between 0.5 inches and 1.5 inches.

13. The infant calming/sleep-aid device of claim 12, further comprising a sound generation device comprising a speaker to generate sound directed to the infant, wherein, in the soothing mode, the control system is further configured to cause the sound generation device to output a low pitch rumbling sound directed to the infant.

14. The infant calming/sleep aid device of claim 13, wherein the control system is configured to reduce the volume of the generated sound in a stepwise fashion if the control system detects that an infant is being soothed.

15. The infant calming/sleep-aid device of claim 13, wherein the low pitched rumbling sound is output within a range between 65 dB and 75 dB.

16. The infant calming/sleep-aid device of claim 13, wherein if the control system determines, utilizing second data signals received from the one or more sensors, that the infant is not being soothed by the sound directed to the infant and reciprocating rotation of the soothing mode, the control system is configured to initiate an enhanced soothing mode comprising causing the sound generation device to direct a higher pitched sound with greater volume to the infant.

17. The infant calming/sleep-aid device of claim 16, wherein the higher pitched sound has a volume between 75 dB and 80 dB.

18. The infant calming/sleep-aid device of claim 16, wherein the second data signals comprise sound detected by the sound sensing device from which the control system determines that the infant is in a second crying state.

19. The infant calming/sleep-aid device of claim 17, wherein the one or more sensors further comprise a motion sensing device that detects motion of the infant when supported on the platform, wherein the second data signals further comprise data signals corresponding to perturbations of the platform detected by the motion sensing device caused by the infant during a reciprocating rotation of the platform in the soothing operational mode.

20. The infant calming/sleep-aid device of claim 18, wherein the control system is configured to initiate the calming reflex operational mode to transition the device from the enhanced soothing operational mode to the calming reflex operational mode if the control system receives the first data signals from which it determines that the infant is in the first crying state.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of one embodiment of the infant calming/sleep-aid device of the invention, with a depiction of an infant asleep inside the device.

(2) FIG. 2 is a perspective view of the infant calming/sleep-aid device of FIG. 1 with swaddle fastening straps and without an enclosure.

(3) FIG. 3 is a perspective view of the infant calming/sleep-aid device of FIG. 2, showing apparatus beneath the main moving platform in broken lines.

(4) FIG. 4 is a plan view of the apparatus supporting the main moving platform of the infant calming/sleep-aid device of FIG. 3, with the rigid base and main moving platform shown in outline.

(5) FIG. 5 is a side view of the infant calming/sleep-aid device shown in FIG. 4, taken along line 5-5.

(6) FIG. 6 is a side view of the infant calming/sleep-aid device shown in FIG. 4.

(7) FIG. 7 is a perspective view of yet another embodiment of the calming/sleep-aid device of the invention, showing components of the device beneath the main moving platform in broken lines.

(8) FIG. 8 is a plan view of the apparatus supporting the main moving platform of the calming/sleep-aid device of FIG. 7, with the rigid base and main moving platform shown in outline.

(9) FIG. 9 is a side view of the embodiment of the device shown in FIG. 7.

(10) FIG. 10 is a schematic representation of one embodiment of a software control system of the invention, along with inputs and outputs of the software control system.

(11) FIG. 11 is a schematic representation of one embodiment of a crying detection module of the invention.

(12) FIG. 12 is a schematic representation of one embodiment of a motion analysis module of the invention.

(13) FIG. 13 is a schematic representation of one embodiment of a behavior state machine module of the invention.

(14) FIG. 14 is a schematic representation of one embodiment of an audio generation module of the invention.

(15) FIG. 15 is a schematic representation of a motion generation module of the invention.

(16) FIG. 16 is a schematic representation of a motion generation module of the invention.

DETAILED DESCRIPTION OF THE INVENTION

(17) In one embodiment of the invention, shown in FIGS. 1 through 6, infant calming/sleep-aid device 10 includes enclosure 12 about infant 14. Enclosure 12 surrounds main moving platform 16. As can be seen in FIG. 2, main moving platform 16 includes base 18, moving head platform 19, padding 20 and cloth covering 22. Swaddle fastening straps 24 extend from main moving platform 16 for securing infant 14 in suitable swaddling clothes 26. Head pad insert 28 supports the head of infant 14. Preferably, head pad insert 28 includes a gel in order to reduce the risk of plagiocephaly. Handles 30 extend laterally from main moving platform 16. Main moving platform 16 is supported and rotatable about a main support shaft (not shown) that is fixed to rigid base 32. Control panel 34, which includes speed control knobs 35, status lights 37 and controls 39 for microphone 38. Rigid base control electronics 36, include drive electronics of infant calming/sleep-aid device 10.

(18) In another representative view of infant calming/sleep-aid device 10 of FIG. 2, shown in FIG. 3, main moving platform 16 is supported by main support shaft 40 at main rotation bearing 42. Moving head platform 19 supports head pad insert 28 and is rotatable about head rotation bearing 46 through arm 48 extending between head rotation bearing 46 and moving head platform 19. Motion sensing device 50, such as an accelerometer, at moving head platform 44 detects motion of moving head platform 19. Microphones 38 at moving head platform 19 detect sound emitted by the infant (not shown) when supported by infant aid sleep device 10. Speakers 52, supported by brackets 54 mounted on rigid base 18, are located directly beneath moving head platform 19. Springs 56 linking either side of moving head platform 19 to main moving platform 16 dampen motion of moving head platform 19 relative to main moving platform 16 during reciprocal motion of moving head platform 19 induced by reciprocating motion of main moving platform 16.

(19) Reciprocating motion of main moving platform 16 about main support shaft 40 is about an axis that is orthogonal to a major plane of main moving platform 16. Reciprocating motion of main moving platform 16 is driven by actuator assembly 58.

(20) In some embodiments, the body and the head of the infant can be out of phase. For example, at relatively slow speeds, the motion of the head of the infant can be in the same direction as that of the motion of the upper body of the infant. At relatively high speeds, the reciprocal motion of the head of the infant can be in the opposite direction as that of the upper body of the infant. In another embodiment of the invention (not shown), reciprocal motion of the head of the infant can be in some other direction, such as orthogonally relative to the plane of the main support platform.

(21) Actuator assembly 58 includes drive motor 60 mounted to rigid base 32 and gear assembly 62 linked to drive motor 60 and also mounted to rigid base 32. Actuation of causes rotation gear assembly 62 to drive eccentric drive plate 64 about an axis normal to a major plane of rigid base 32. Eccentric drive plate 64 is linked to swing arm plate 66 of actuator assembly 58 that extends from eccentric drive plate 64 to rod end 68 of screw 70 and is pivotally mounted to rod end 68 of screw 70. Screw 70 is mounted to amplitude modulation assembly 72. Amplitude modulation assembly 72 includes amplitude modulation motor 74, nut 76, mounted on nut frame 78, which swivels on rotation bearing 80 mounted to rigid base 32. The axis of rotation of nut frame 78 on rotation bearing 80 is, like that of eccentric drive plate 64, normal to a major plane of rigid base 32. Actuation of amplitude modulation assembly 72 causes movement of screw 70 along its major longitudinal axis to thereby cause rod end 68 to become more proximate or less proximate to amplitude modulation assembly 72. Arm 82 extends from an end of screw 70 opposite to rod end 68 to elastic actuator catch bracket 84, which is mounted on base 18 of main moving platform 16. Arm 82 extends through an opening defined by elastic actuator catch bracket 84 and is linked to main moving platform 16 by springs 86, 88 held in place on either side of elastic actuator catch bracket 84 by nuts 90, 92 respectively.

(22) Actuation of actuation assembly drive motor 60 causes rotation of eccentric drive plate 64 about an axis normal to a major plane of rigid base 32 which, in turn, causes reciprocal motion of swing arm plate 66 roughly along a major longitudinal axis of swing arm plate 66. Such reciprocal motion of swing arm plate 66 causes rod end 68 to move in a reciprocal motion from side-to-side of a major longitudinal axis of screw 70 which causes reciprocal rotation of nut frame 78 about an axis normal to major plane rigid base 18 and side-to-side motion of the opposite end of screw 70 opposite that of rod end 68 of screw 70. Such side-to-side movements of the opposite end of screw 70 causes reciprocal longitudinal movement of arm 82 extending through the opening defined by elastic actuator catch bracket 84. Resistance to such reciprocal motion of arm 82 causes alternating reciprocal compression and relaxation of springs 86, 88, which thereby causes reciprocal motion of main moving platform 16 about main support shaft 40 linking main moving platform 16 to rigid base 32.

(23) The amplitude of reciprocal motion of main moving platform 16 about main support shaft 40 is controlled by the location of screw 70 relative to amplitude modulation assembly 72. For example, if actuation of amplitude modulation assembly 72 causes rod end 68 to become more proximate to amplitude modulation assembly 72, the side-to-side motion of the opposite end of screw 70 will become greater, thereby causing the amplification of reciprocal motion of main moving platform 16 about main support shaft 40 to increase. Conversely, actuation of amplitude modulation assembly 72 to cause rod end 68 of screw 70 to become more remote from amplitude modulation assembly 72 will diminish the side-to-side motion of opposite end of screw 70, thereby reducing the amplitude of reciprocal motion of main moving platform 16 about main support shaft 40.

(24) Reciprocal motion of main moving platform 16 causes a delayed reciprocal motion of moving head platform 44 about head rotation bearing 46. The reciprocal motion of moving head platform 44, although delayed, has greater amplitude about main support shaft 40 because of the rotation of moving head platform 44 about head rotation bearing 46. However, the amplitude of reciprocal motion of moving head platform 44 about head rotation bearing 46 is dampened by springs 56. Nevertheless, the reciprocal motion of main moving platform 16 and moving head platform 44 about main support shaft 40 is measured by motion sensing device 50 at moving head platform 44. Measurements by motion sensing device 50 are relayed back to control panel 34 and rigid base control electronics 36 which, alone, or optionally, in combination with external computer software programming, modulate actuator assembly drive motor 60 and amplitude modulation motor 74. Motion detection by motion sensing device 50 can also, optionally, modulate computer programming to affect selection and volume of sounds emitted by speakers 52. Microphones 38, in addition, or optionally, receive acoustical signals that can be fed back through rigid base control electronics 36 or/and control panel 34 to software, either on-board or remote from infant calming/sleep-aid device 10, that further modulates actuator assembly drive motor 60, amplitude modulation motor 74 and/or sounds emitted from speakers 52. Algorithms associated with modulation of actuator assembly drive motor 60, amplitude modulation motor 74 and speakers 52 will be more fully discussed below.

(25) In one embodiment, the device allows for a reciprocating motion at 0.5-1.5 cps of 2 excursions, but if the baby is fussy the device responds by delivering a smaller excursion (e.g. <1) at a faster rate (2-4.5 cps). This fast and small motion delivers the specific degree of acceleration-deceleration force to the semicircular canals in the vestibular mechanism of the inner ear that is required to activate the calming reflex.

(26) Also, the reciprocating motion typically has a maximum amplitude of less than one inch during the rapid phase of motion (2-4.5 cps), further ensuring safety of the infant.

(27) In another embodiment, shown in FIGS. 7 through 9 calming/sleep-aid device 100 includes actuator assembly 102, which substitutes for actuator assembly 58 of the embodiment shown in FIGS. 2 through 6. Specifically, as shown in FIGS. 7 through 9, drive motor 104 of calming/sleep-aid device 100 is linked to bearing 106, which is, in turn, leads to the eccentric drive plate 108. Eccentric drive plate 108 is connected to push/pull rod 110 that extends through an opening defined by elastic actuator catch bracket 112. Springs 114 about push/pull rod 110 link push/pull rod 110 to main moving platform 16 through elastic actuator catch bracket 112. Springs 114 are series elastic actuator push-springs; they transfer force from actuator assembly 102 to catch bracket 112. Balancing dampers 115 beneath push/pull rod 110 dampen the motion of moving platform 16. Springs 117 are pull-balancing springs; they pull on bracket 112 in parallel with balancing dampers 115 to create the desired smooth sinusoidal motion of moving platform 16 at low frequencies and the rapid accelerating motion at high frequencies.

(28) Actuation of drive motor 104 causes reciprocal longitudinal movement of push/pull rod 110 through the opening defined by elastic actuator catch bracket 112 and translates that reciprocal movement into reciprocal motion of main moving platform 16 about main rotation bearing 42, as does reciprocal motion of arm 82 through elastic actuator catch bracket 84 of the embodiment shown in FIGS. 2 through 6. Other components of the embodiments shown in FIGS. 7 through 9 operate in the same manner as those of infant calming/sleep-aid device 10 represented in FIGS. 2 through 6.

(29) As shown FIG. 10, software control system 120, processes inputs from microphones and generates outputs to speakers represented in FIGS. 2 through 9, also processes inputs from speed control knob 121, also shown in FIGS. 2 through 9, and from a three-axis USB accelerometer 123, represented as motion sensing device in FIGS. 2 through 9. In addition, software control system 120 generates an output signal to multichannel USB motor controller 122, which controls actuator assembly drive motor 60 (not shown) and amplitude modulation motor 74 (not shown) or, alternatively, as shown in FIGS. 7 through 9, drive motor 104 (not shown). Status lights, such as tricolor USB DEs 121, are represented as lights 37 in FIGS. 2 through 9. Modules of software control system 120 can be located on-board or remotely from the embodiments of infant calming/sleep-aid devices 10, 100 shown in FIGS. 2 through 9. The modules include a crying detection module 124 that receives data from microphones 125, represented at microphones 38 in FIGS. 2 through 9, and relays to a behavior state machine module 126 whether or not an infant on infant calming/sleep-aid device is crying or not crying. Depending upon the input received by behavior state machine module 126, output signals will control motion generation module 128 or audio generation module 130. Actuation of motion generation module 128 will modulate the actuator assemblies of the embodiments shown in FIGS. 2 through 9. Alternatively, or in addition, output signals from behavior state machine module 126 will modulate generation of audio data output from audio generation module 130 to speakers 131, represented as speakers 52 in FIGS. 2 through 9.

(30) Data received from accelerometer 123 is processed by motion analysis module 132 to thereby modulate the actuator assembly through motion generation module 128 and/or audio generation module 130 to thereby control the actuators assemblies or speakers, respectively. In addition, motion analysis module 132 controls status light module 134 to alert, through the status lights, whether motions of the main moving platform and the head platform are nominal or not nominal, or alternatively, through feedback, soothing or not soothing to the infant. Nominal, as that term is defined herein, refers to any and all motion for which the filtered acceleration signal does not exceed a specified, or predetermined maximum motion threshold for a specific length of time. The process by which the motion analysis module classifies motion as nominal or not nominal is detailed in FIG. 12 and in the accompanying text below.

(31) In one embodiment the rate of the reciprocating rotation is in a range of between about two and about four and one-half cycles per second and an amplitude of the reciprocating motion at a center of a head of the infant is in a range of between about 0.2 inches and about 1.0 inches. In anther embodiment, the rate of reciprocating motion is in a range of between about 0.5 and about 1.5 cycles per second and an amplitude of the reciprocating rotation at a center of the head of the infant is in a range of between about 0.5 inches and about 2.0 inches.

(32) The software weans the infant off the device by incorporating the infant age as a variable used by the behavior state module control system, wherein modulation is further controlled by at least one of the weight of the infant, the age of the infant, and the duration of the detected sounds made by the infant.

(33) Referring to FIG. 11, crying detection module 124 receives audio data from the microphones of infant calming/sleep-aid devices 10,100, which is processed through digital band-pass filter 136 to generate filtered audio data. Energy-based threshold 138 receives filtered audio data to determine whether the audio energy is over threshold or under threshold. Time-based filter 140 receives data from energy-based threshold 138 to provide an indication as to whether the infant is crying or not crying. The information, as discussed above with respect to software control system 120 (FIG. 10), is received from crying detection module 124 by behavior state machine module 126 that will then modulate either motion generation module 128 or audio generation module 130.

(34) Motion analysis module 132, shown and represented in more detail in FIG. 12, receives a signal from the motion sensing device of infant calming/sleep-aid devices 10, 100, at digital filter bank 142. Digital filter bank 142 filters the signal to generate a filtered motion amplitude estimate that is used as input to motion generation module 128 (FIG. 10). In addition, the filtered motion amplitude estimate passes through a range check 144 to determine whether the motion is within a soothing or known soothing range. Time-based filter 146 receives data from range check 144 to provide an indication as to whether a motion is soothing or not soothing. Filtered motion sensor, or accelerometer, data from digital filter bank 142 also passes through threshold crossing-based motion frequency estimator 148. Outputted data from threshold-crossing-based motion frequency estimator 148 passes through range check 144 for indicating whether the motion is or is not soothing, and also provides input to motion generation module 128 (FIG. 10). Filtered accelerometer data from digital filter bank 142 also is processed to determine whether or not the acceleration exceeds a specific maximum motion threshold 150 and, depending on the result, processes that data through time-based filter 152 to provide an indication as to whether the motion is nominal or not nominal. This indication as to whether the motion is nominal or not nominal is used as input to motion generation module 128 (FIG. 10), and is additionally used to control status lights 37 (FIG. 2) via status light module 134 (FIG. 10).

(35) As can be seen in FIG. 13, behavior state machine module 126 receives information from crying detection module 124 (FIG. 11) as to whether the infant is in a state of crying or not crying. This information is used by the state machine's state transition rules 156 to select an active state from a library of states 154, thereby outputting a desired motion state, a desired audio track and/or desired volume/equalizer settings to audio generation module 130 (FIG. 10).

(36) Audio generation module 130, represented in FIG. 14, receives signals of a desired audio track and desired volume/equalizer settings from behavior state machine module 126 (FIG. 10) and signals of motion analysis, specifically, whether the motion is nominal or not nominal, from motion analysis module 132 (FIG. 10). Audio generation module 130 includes a library of soothing audio tracks 160, a digital equalizer/volume control 162 and alarm sound 164. Upon receipt of a new command from motion analysis module 132 (FIG. 10), audio generation module 130 will cross-fade to a desired audio track and volume, and crossfade to desired equalizer settings. If the motion is not nominal, then an alarm signal will be output to override the audio signal with an alarm. The audio signal from the audio generation module is output to the speakers of infant calming/sleep-aid device 10, 100.

(37) At baseline, the audio generator will produce an output of a low-pitch, rumbling sound at about 65 dB to about 70 dB. Upon receipt of a new command from crying detection module 124 (FIG. 11), audio generation module 130 will cross-fade to a more high pitched audio track and louder volume, at about 75 dB to about 80 dB.

(38) Two variations of motion generation module are represented in FIGS. 15 and 16. In the first embodiment, shown in FIG. 12, motion generation module 128 receives a desired motion state input from behavior state machine module 126 (FIG. 10), a motion frequency/amplitude signal from motion analysis module 132 (FIG. 10), a desired system speed signal from speed control knob 121 (FIG. 10), and a signal as to whether a motion is nominal or is not nominal. The desired system speed is the setting of speed control knob 121, whereby the operator can limit the motions allowed by infant calming/sleep-aid device 10, 100. The desired motion state signal goes to lookup within motion generation module 128, which outputs a reference motor command based on a desired motion state. If the currently-active motor commands are close to the reference motor commands, then the motor commands are actively adjusted within an allowable envelope via a gradient ascent based on observed motion frequency and amplitude. If the current motor commands are not close to the reference motor commands, then the motion generation module will set desired motor commands via path planning in a motor command space. Path planning transitions motor settings to desired motor settings by inserting intermediate motor settings as necessitated by nest dynamics to ensure that motion stays in a desirable range during transition. If the desired system speed is less than full, then a signal is sent to adjust the desired motor commands in proportion to the desired system speed. Full is the fully-on position of the knob, and means that infant calming/sleep-aid device 10, 100 is not being limited by this knob and is allowed to perform all of the motions it determines to be relevant. If speed control knob 121 is turned down from full, motions of infant calming/sleep-aid device 10, 100 start to become constrained, so speed control knob 121 acts as an operator to override the normal motion behavior of infant calming/sleep-aid device 10, 100. If not, then a comparison is made as to whether the observed motion is nominal. If it is not, then motor output is disabled. If it is nominal, then an output signal of desired motor commands is given to target motor positions and speeds of the actuator of the multichannel USB motor controller.

(39) In an alternative embodiment of motion generation module 128, shown in FIG. 16, there is no receipt by the module of signals related to motion frequency and amplitude. Therefore, it is only necessary to set desired motor commands by interpolating from a current command based on a look up table of motor commands based on a desired motion state in response to receiving a signal with respect to the desired motion state. All of the components of motion generation are the same as represented in FIG. 15.

EXPERIMENTAL SECTION

Materials

(40) Two versions of the infant calming/sleep-aid device as shown in FIGS. 2 through 9 of the invention were created, with microphones to detect infant crying, motion and sound actuators, a swaddling system to keep the baby in optimal position and a gel pad to reduce the pressure on the back of the skull that predisposes to plagiocephaly. The device also contained a logic board to accomplish two tasks; deliver staged interventions of specially engineered sound and to deliver motion created by two linked platforms attached to a motor and rod actuator (as well as a series of springs and dampeners to modulate the activity.) These platforms acted in a reciprocating manner about an axis that intersected the infant and was orthogonal to a major plane of the surface supporting the infant to provide a motion that varies from slow smooth rocking (0.5-1.5 cps) to keep babies calm and promote sleep . . . ramping up to a faster, smaller, jiggly motion (2-4.5 cps) with a more spiked waveform to deliver a sufficiently abrupt acceleration-deceleration action to stimulate the vestibular mechanism of the inner ear, trigger calming reflex and soothe the baby when she cried (head rocking back and forth in excursions of less than 1 inch). The sound in the device was also designed to respond to the baby's upset by starting a specially engineered loud, harsh and high pitched and then stepping down to quieter, lower pitched white noise over several minutes. The device was specifically designed to gradually reduce (wean) the intensity of the sound and motion over several months.

(41) The device worked in the following way:

(42) The baby was placed in a swaddling sack (with arms in or out) attached to the mattress of the device and securely laid on his/her back. The device produced a baseline level of low pitched, rumbling noise at approximately 65 dB and baseline motion of a smooth, side-to-side rocking (2 inch excursions to either side). When the baby cried for more than 10 seconds, the device responded by playing a specially engineered sound that was harsher, higher pitched, more multi-frequency (75-80 dB) to mimic the intensity of the sound that the baby heard inside the mother's uterus prenatally. (This sound can be measured in situ at up to 92 dB.) If the crying continued another 10 seconds (despite the sound), the motion accelerated to a faster, more jiggly action of the head (2-4.5 cps, but no more than 1 inch head excursions to either side). The combination of fast movements delivered with sufficient vigor, the harsh loud sound, and the secure swaddling sack all worked together to activate the calming reflex, in the majority of irritable babies and inducing either calmness or sleep. The device responded to the baby's cry in a step-wise fashion-gradually increasing sound and then motion-to a maximal level. Once the baby was calmed the motion and sound of the device was gradually reduced in a specific, step-wise fashion back to the baseline activity.

(43) Subjects

(44) The device was tested on over twenty babies (12 girls, 10 boys) were in the device. The babies ranged from 5 weeks to 6 months of age. Their weights ranged from 8 pounds to 18 pounds.

(45) Methods and Procedures

(46) The subjects were tested to record their resting and sleeping in the device. The tests usually began when the baby was hungry and tired (immediately before their usual naptime). The parents were introduced to the device and given a brief demonstration of how it worked. We recorded when the baby last fed and napped and then put the baby in the swaddling sack and placed the infant in the device. We observed and videotaped the session. In addition, we collected data from 3 accelerometers and a device-mounted camera to detect the vigor of activity and measure the exact excursions of the baby's head. We started each test with the device set at its lowest level for sound and motion. We observed as the device responded to the baby's cries. We allowed the device to quickly advance through each of its stages as the cries escalated. Once the baby was calmed, the device's motion would slow, in a stepwise fashion, and the loudness and pitch of the sound would decrease, in a stepwise fashion. We repeated this format 2-4 times during our sessions with each of the subjects. The first set of studies was done using a prototype with a dual motion actuator and the second set of studies was done with a prototype with a single motion actuator.

(47) Results

(48) As shown in the attached table, during twenty-one tests, 19 babies were either significantly calmed or put to sleep by our device (absence of calming was due to hunger). Most calming and sleep occurred within 2 minutes of placing the baby in the device.

(49) We hypothesized that a device could be built that responded to the baby's needs, such that an infant's upsets would be soothed by vigorous stimulation to activate the calming reflex, followed by a diminution of those stimuli to help keep the calming reflex turned on and sustain the baby in a calm state and/or promote sleep, i.e., reducing sleep latency and increasing sleep efficiency. Sleep latency is defined as the length of time between going to bed and falling asleep. Sleep efficiency is defined as the ratio of time spent asleeptotal sleep time to the amount of time spent in bed.)

(50) TABLE-US-00001 No. of times baby wakes Time Time since Calmed or Patient/Baby Test Baby's Baby's during the since last last put to Name Date Age Weight night nap feeding sleep Candace/Dennielle 13 weeks 14.11 lbs 1-2 times Calmed Amanda/James Calmed Jenn/MacKienze 13.5 lbs 2 times Calmed Sarah/Sloane Oct. 12, 2011 5 weeks 5-6 times Sleep Sheela/Julia 9.5 lbs 3-4 times Calmed Sally/Elise Mar. 5, 2012 7 weeks 8.1 lbs 2-3 times 2.0 hours 10 minutes Sleep Emily/Reese Mar. 5, 2012 7 weeks 8.3 lbs 3-4 times 1.5 hours 30 minutes Sleep Jackie/Drew Mar. 6, 2012 5.5 months 12.0 lbs. 3-4 times 2.0 hours 1.0 hours Calmed Jackie/Tessa Mar. 6, 2012 5.5 months 11.0 lbs 3-4 times 2.0 hours 1.0 hours Calmed Jessica/Noah Mar. 13, 2012 4.5 months 14.4 lbs 4-6 times 1.0 hours Sleep Charisse/Rhett Mar. 8, 2012 4.0 months 14.0 lbs 3-4 times 10 minutes 2.0 hours Sleep Dolge/Ashee Mar. 12, 2012 4.0 months 14.0 lbs 5-7 times 3.0 hours 1.5 hours Sleep Laura/Charlotte Mar. 13, 2012 4 weeks 10.0 lbs 3-5 times 1.0 hours 10 minutes Sleep Laura/John Mar. 15, 2012 6 weeks 10.5 lbs 1-3 times 2.0 hours 1.0 hours Sleep Amelia/Arthur Mar. 15, 2012 6.0 months 15.9 lbs 3-4 times 10 minutes 1.0 hours No Iris/Charlie Apr. 23, 2012 4 weeks 10.0 lbs 4-6 times 1.0 hours 1.0 hours Calmed Elyse/Christian Apr. 23, 2012 5 months 13.5 lbs 3-4 times 1.0 hours 1.0 hours Sleep Margaret/Halina Apr. 28, 2012 4.5 months 16.2 lbs 3-4 times 1.0 hours 30 minutes Sleep Laine/Lucas May 7, 2012 4 weeks 9.5 lbs 4-6 times 2.0 hours 30 minutes Sleep Rachel/Cade May 7, 2012 5 months 18.0 lbs 3-4 times 1.0 hours 2.0 hours Sleep Rose/Elsie May 8, 2012 4 weeks 10.0 lbs 4-6 times 10 minutes 2.0 hours No

CONCLUSION

(51) It was possible to promote infant calming and sleep through the use of swaddling plus very specific sound and motion stimuli to activate the calming reflex.

EQUIVALENTS

(52) While this invention has been particularly shown and described with references to example embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.

(53) The relevant teachings of all references cited herein are incorporated by reference in their entirety.