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Are there other devices besides the audio driver that could produce ultrasonic sounds when driven in a certain way?
by codezero 10y ago
Are there other devices besides the audio driver that could produce ultrasonic sounds when driven in a certain way?
- ethbro 10y agoI was curious about this too. My EE (particularly RF) studies didn't go far enough for me to chime in. Is there power circuitry, etc that could likely (a) generate inaudible frequencies that overlap with mass-market microphone capability & (b) would be sufficiently controllable (albeit likely indirectly) for data transfer?