What kind of sound frequency which can be audible in speaker but cant be recorded & playback. I want to send a sound file which can be listen by receiver but cant be recorded for future playback use.
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What you are suggesting is impossible to achieve.– MarkApr 9, 2020 at 4:54
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1 Answer
You can't do this. If a sound can be played back by an ordinary speaker, it can be picked up by a microphone.
