Asymmetry is provided for the pushing pulse in acoustic radiation force impulse (ARFI) imaging. MI is based on the negative pressure. By increasing the positive pressure more than the negative pressure, the magnitude of displacement may be increased without exceeding the MI limit. Similarly, negative voltages depole while positive do not, so using an ARFI or pushing pulse with asymmetric positive-to-negative peak pressures or voltages allows for generation of greater magnitude of displacement without harm to the transducer.

Asymmetry is provided for the pushing pulse in acoustic radiation force impulse (ARFI) imaging. MI is based on the negative pressure. By increasing the positive pressure more than the negative pressure, the magnitude of displacement may be increased without exceeding the MI limit. Similarly, negative voltages depole while positive do not, so using an ARFI or pushing pulse with asymmetric positive-to-negative peak pressures or voltages allows for generation of greater magnitude of displacement without harm to the transducer.

A system and methods are described that implement a consumer device (smartphone-, tablet- and/or lap top) configured to detection motion via an application program installed on the devices non-transitory medium. The application program contains computer readable instructions instructing the device to perform a number of tasks and configures the device processor to detect motion using Doppler Effect and audio processing. The system uses existing hardware and software in devices (smartphones, tablets or laptops) including the devices non transitory computer readable medium comprising the application program with computer readable instructions, which upon activation, commands the device to transmit ultrasound (18.0-22.0 kHz) and receive the return sound, while the application program configures the device processor to use audio processing to identify shifts in transmitted sound frequency caused by Doppler Effect created by movement of an object or a person. The audio processing effectively turns the device into a short-range motion detector—effective up to 10 meters—detecting movement (not speed or direction) of human sized objects. When Doppler Effect data processing confirms movement, the application program can command the device to initiate a sequence of actions.

A system and methods are described that implement a consumer device (smartphone-, tablet- and/or lap top) configured to detection motion via an application program installed on the devices non-transitory medium. The application program contains computer readable instructions instructing the device to perform a number of tasks and configures the device processor to detect motion using Doppler Effect and audio processing. The system uses existing hardware and software in devices (smartphones, tablets or laptops) including the devices non transitory computer readable medium comprising the application program with computer readable instructions, which upon activation, commands the device to transmit ultrasound (18.0-22.0 kHz) and receive the return sound, while the application program configures the device processor to use audio processing to identify shifts in transmitted sound frequency caused by Doppler Effect created by movement of an object or a person. The audio processing effectively turns the device into a short-range motion detector—effective up to 10 meters—detecting movement (not speed or direction) of human sized objects. When Doppler Effect data processing confirms movement, the application program can command the device to initiate a sequence of actions.

A method for using an active sonar includes an acoustic antenna exhibiting a continuous bandwidth having a spectral emission width of at least two octaves and an electronic system for generating control signals for the acoustic antenna, the method comprising: dynamically selecting a plurality of distinct sonar functioning or operating modalities chosen from escort, surveillance, pursuit, dissuasion and communication, each using a different fraction of the emission bandwidth of the acoustic antenna, referred to as a channel; and using the electronic system to generate a plurality of control signals for the acoustic antenna corresponding to the selected functioning modalities, the electronic system being suitable for allowing the sonar to function according to a plurality of independent and simultaneous operating modalities. And sonar system for implementing such a method is also provided.

A method for using an active sonar includes an acoustic antenna exhibiting a continuous bandwidth having a spectral emission width of at least two octaves and an electronic system for generating control signals for the acoustic antenna, the method comprising: dynamically selecting a plurality of distinct sonar functioning or operating modalities chosen from escort, surveillance, pursuit, dissuasion and communication, each using a different fraction of the emission bandwidth of the acoustic antenna, referred to as a channel; and using the electronic system to generate a plurality of control signals for the acoustic antenna corresponding to the selected functioning modalities, the electronic system being suitable for allowing the sonar to function according to a plurality of independent and simultaneous operating modalities. And sonar system for implementing such a method is also provided.

A method and system for improving wearable device function control is provided. The method includes detecting a first gesture executed by a user. A speed and direction of the first gesture; an eye focus of the user, and a time period associated with eye focus being directed towards a display portion of a wearable device are detected. The first gesture is analyzed with respect to previously determined mapping data, the speed and direction of the first gesture, the eye focus of the user, and the time period. In response, a specified function of the wearable device associated with the first gesture is determined and executed.

A method and system for improving wearable device function control is provided. The method includes detecting a first gesture executed by a user. A speed and direction of the first gesture; an eye focus of the user, and a time period associated with eye focus being directed towards a display portion of a wearable device are detected. The first gesture is analyzed with respect to previously determined mapping data, the speed and direction of the first gesture, the eye focus of the user, and the time period. In response, a specified function of the wearable device associated with the first gesture is determined and executed.

Embodiments are provided for managing the operation of sensors in an electronic device. According to certain aspects, the electronic device may detect a change in motion from an initial set of sensor data generated by a sensor(s). A memory cache may store the initial set of sensor data or additional sensor data generated by the sensor(s). The electronic device may initiate a supplemental algorithm that analyzes the cached data. Based on the analysis of the cached data and whether the change in motion is confirmed or whether additional motion is detected, the electronic device may manage the operation of the supplemental algorithm.

Embodiments are provided for managing the operation of sensors in an electronic device. According to certain aspects, the electronic device may detect a change in motion from an initial set of sensor data generated by a sensor(s). A memory cache may store the initial set of sensor data or additional sensor data generated by the sensor(s). The electronic device may initiate a supplemental algorithm that analyzes the cached data. Based on the analysis of the cached data and whether the change in motion is confirmed or whether additional motion is detected, the electronic device may manage the operation of the supplemental algorithm.