Validating the operation of a transducer and an audio signal path

A method to validate the operation of a transducer and an audio signal path to the transducer, the method comprising:

• switching, with an audio switch, the audio signal path between an audio power amplifier and an analog-to-digital converter, and
• routing an audio signal received from the transducer to the analog-to-digital converter when the audio power amplifier is not enabled;
• upon receiving an electrical signal indicating that a button has been either actuated or de-actuated, processing, with an electronic processor, a digital version of the audio signal received from the analog-to-digital converter to generate a sample,
• comparing the sample to a reference audio sample that represents sound generated when the button is either actuated or de-actuated;
• and
• generating an alert when the sample does not match the reference audio sample.

A remote speaker microphone comprising:

• an audio signal path coupled to a transducer;
• an audio power amplifier;
• an analog-to-digital converter;
• an audio switch coupled in the audio signal path, the audio switch configured to
• switch the audio signal path between the audio power amplifier and the analog-to-digital converter, and
• route an audio signal received from the transducer to the analog-to-digital converter when the audio power amplifier is not enabled;
• and
• an electronic processor, coupled to the analog-to-digital converter, and configured to
• upon receiving an electrical signal indicating that a button has been either actuated or de-actuated, process a digital version of the audio signal received from the analog-to-digital converter to generate a sample,
• compare the sample to a reference audio sample that represents sound generated when the button is either actuated or de-actuated;
• and
• when the sample does not match the reference audio sample, generate an alert.