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Can't all speakers be used as a poor man's microphone?
by maximus-decimus 3y ago
Can't all speakers be used as a poor man's microphone?
- pjc50 3y agoIn a technical sense, yes, but you need to think about what's on the other side: there will be a piezo driver amplifier, which may be driven directly from a digital output such as I2S audio from the phone ASIC. Without some sort of preamp-ADC combination wired to the speaker, there's no way for software on the phone to use it as a microphone.