Detection of ultrasonic signals

An apparatus comprising:

• at least one processor;
• and
• at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:
• providing first data derived from a signal received by a microphone of a user device;
• providing second data representing mechanical oscillations within a gyroscope of the user device:
• detecting, based at least in part on the first data and the second data, that the signal received by the microphone comprises an ultrasonic signal;
• and
• responsive to the detection, controlling the user device for mitigating one or more events associated with receipt of the ultrasonic signal by the microphone.

A method, comprising:

• providing first data derived from a signal received by a microphone of a user device;
• providing second data representing mechanical oscillations within a gyroscope of the user device;
• detecting, based at least in part on the first data and the second data, that the signal received by the microphone comprises an ultrasonic signal;
• and
• responsive to the detection, controlling the user device for mitigating one or more events associated with receipt of the ultrasonic signal by the microphone.

A non-transitory computer readable medium comprising program instructions stored thereon for performing at least the following:

• providing first data derived from a signal received by a microphone of a user device;
• providing second data representing mechanical oscillations within a gyroscope of the user device;
• detecting, based at least in part on the first data and the second data, that the signal received by the microphone comprises an ultrasonic signal;
• and
• responsive to the detection, controlling the user device for mitigating one or more events associated with receipt of the ultrasonic signal by the microphone.