Sensor fusion to validate sound-producing behaviors

A power- and bandwidth-limited system to measure sound-producing behaviors of a subject, the system comprising:

• a processor;
• a power source;
• a microphone communicatively coupled to the processor and configured to generate an audio data signal that represents sound in a vicinity of the subject;
• at least one second sensor communicatively coupled to the processor and configured to generate at least a second data signal that represents at least one parameter other than sound;
• and
• a non-transitory computer-readable medium communicatively coupled to the processor and having computer-executable instructions stored thereon that are executable by the processor to perform or control performance of operations comprising:
• receiving the second data signal from the at least one second sensor;
• detecting a wake-up event from the second data signal;
• sending a first signal to the power source to provide power to the microphone;
• receiving the audio data signal from the microphone;
• detecting one or more sound-producing behaviors of the subject based on:
• both the audio data signal and the second data signal;
• or
• information derived from both the audio data signal and the second data signal;
• and
• sending a second signal to the power source to cease providing power to the microphone.