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This disclosure describes a secure microphone implementation based on four states (Idle, Ultrasonic frequency, Human audible frequency and Ultrasonic + Human audible frequency). The microphone state changes based on the use case (e.g. listen for connection parameters from SpaceX, enable Ultrasonic frequency state). It allows a fine grain access of a pre-defined set of audio frequency ranges (Figure 1 - Audio frequencies), allowing an application, for example, to request mic access with only ultrasonic frequency range (without providing the audible frequency signal) for data transfer communication. The main advantage of this implementation is to have the microphone in the correct state based on the use case and preserve privacy when mic is not in human audible state allowing the mic to be used in data transfer mode.

Creative Commons License

Creative Commons License
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