A system includes at least one earpiece wherein each earpiece comprises an earpiece housing, a light source operatively connected to each earpiece housing and configured to transmit substantially coherent light toward an outer surface of a user's body, a light receiver operatively connected to the earpiece housing proximate to the light source and configured to receive reflected light from the outer surface of the user's body, and one or more processors disposed within the earpiece housing and operatively connected to the light source and light receiver, wherein one or more processors is configured to determine bone vibration measurements from the reflected light. A method of determining bone vibrations includes providing at least one earpiece, transmitting substantially coherent light toward an outer surface of a user's body using the earpiece, receiving reflected light from the outer surface of the user's body using the earpiece, and determining bone vibration measurements using the earpiece.

Methods of operating headphones may involve filtering an input signal into a first filtered input signal and a second filtered input signal utilizing a filter. The second filtered input signal may be sent directly to a tactile vibration driver and tactile vibrations may be produced. A fixed, predetermined inverse transfer function may be applied to the first filtered input signal, generating an anti-wave signal. The anti-wave signal may be summed with the first filtered input signal, generating an output signal. Alternatively, a fixed, predetermined transfer function may be applied to the first filtered input signal, generating a modified input signal. The modified input signal may be subtracted from the first filtered input signal, generating an output signal. Audio sound waves may be produced with an acoustic driver responsive to the output signal, reducing effects of incidental acoustic noise generated by the tactile vibration driver.

A system includes at least one earpiece wherein each earpiece comprises an earpiece housing, a light source operatively connected to each earpiece housing and configured to transmit substantially coherent light toward an outer surface of a user's body, a light receiver operatively connected to the earpiece housing proximate to the light source and configured to receive reflected light from the outer surface of the user's body, and one or more processors disposed within the earpiece housing and operatively connected to the light source and light receiver, wherein one or more processors is configured to determine bone vibration measurements from the reflected light. A method of determining bone vibrations includes providing at least one earpiece, transmitting substantially coherent light toward an outer surface of a user's body using the earpiece, receiving reflected light from the outer surface of the user's body using the earpiece, and determining bone vibration measurements using the earpiece.

There is provided a micro-electromechanical system (MEMS) device (102, 200, 300, 404) for cancelling noise generated by oscillation of a movable micro-electromechanical system (MEMS) element (104, 204, 304, 406). The micro-electromechanical system (MEMS) device (102, 200, 300, 404) includes the movable micro-electromechanical system (MEMS) element (104, 204, 304, 406), an actuator (106, 208, 306, 408), a controller (108, 410) and a movable noise cancelling element (110, 202, 312, 412). The controller (108, 410) provides electrical signals to drive the actuator (106, 208, 306, 408) and the movable noise cancelling element (110, 202, 312, 412) in a way to cancel the noise generated in the micro-electromechanical system (MEMS) device (102, 200, 300, 404) by oscillation of the movable MEMS element (104, 204, 304, 406). The movable noise-cancelling element (110, 202, 312, 412) produces anti-phase noise based on the electrical signals received from the controller (108, 410) to cancel noise caused by oscillation of the movable MEMS element (104, 204, 304, 406) based on the control signals received from the controller (108, 410).

A camera includes one or more microphone pairs. A first microphone (e.g., a main microphone) is ported to the outside of the camera and captures the desired external audio signal, but may also capture undesired vibrational noise. A second microphone has a similar structure to the first microphone, but is not ported to the outside of the camera. Instead, the second microphone is ported into an enclosed cavity (e.g., 1-2 cubic centimeters in volume). The second microphone may pick up the same vibration excitation and internal acoustic noise as the first microphone but very little of the desired external acoustic sounds around the camera. The unwanted noise can then be removed by subtracting the second audio signal from the second microphone from the main audio signal from the main microphone.

The present disclosure provides a microphone apparatus. The microphone apparatus may include a microphone and a vibration sensor. The microphone may be configured to receive a first signal including a voice signal and a first vibration signal. The vibration sensor may be configured to receive a second vibration signal. And the microphone and the vibration sensor are configured such that the first vibration signal may be offset with the second vibration signal.

A noise reduction device and method comprises: at least one sound pickup microphone module for picking up sound from a medium to generate a noise pickup signal; at least one speaker driver for transmitting, to the medium, a vibration corresponding to a noise cancellation signal generated on the basis of the noise pickup signal; and a controller for generating the noise cancellation signal on the basis of the noise pickup signal.

[Object] A control apparatus according to an embodiment of the present technology includes a tactile control section and an audio control section. The tactile control section generates, on the basis of a tactile signal for tactile presentation, a tactile control signal for driving a tactile presentation unit. The audio control section generates, on the basis of a first audio signal and a second audio signal, an audio control signal for driving an audio output unit, the second audio signal containing sound components that are in an opposite phase to sound generated on the basis of the tactile signal and generated from the tactile presentation unit.

A method and an apparatus for active noise suppression in a vehicle. The apparatus includes an actuator in the vehicle and a part of the vehicle. The part of the vehicle is designed according to a first transfer function, which characterizes a transmission behavior of the part of the vehicle for sound. At least a part of the actuator is configured according to a second transfer function, which characterizes a transmission behavior of the at least one part for sound. The actuator is controllable in dependence on a control variable for active noise suppression.

Embodiments include systems with active sound canceling properties, fenestration units with active sound canceling properties, retrofit units with active sound canceling properties and related methods. In an embodiment a system can include a sound cancellation device include a sensing element to detect vibration of a transparent pane and/or a sound input device configured to detect sound incident on the transparent pane, as well as a vibration generator configured to vibrate the transparent pane and a sound cancellation control module. The sound cancellation control module can evaluate the detected vibration of the transparent pane at two or more discrete frequency bands. The sound cancellation control module can cause the vibration generator to vibrate the transparent pane causing destructive interference with sound waves at the two or more discrete frequency bands. Other embodiments are also included herein.