From my understanding, hearing aids work the following way:
- a microphone picks up nearby sounds
- a miniature computer stores the sound data in ram and processes the sound
- the processed sound is then sent to the amplifier, then to the speaker, then to the ear
However, I thought that the first 2 steps would be considered illegal in general, for e.g. digitally recording a conversation without consent of the other party.
So I was wondering how hearing aids became legal for everyday use. For example, is it that:
- hearing aids were added as a special exemption to the law? If so, what was the legal process/history behind getting this approved?
- the way hearing aids process the sound makes it legal (like perhaps not storing any audio data to any disk)? If so, what are the exact details of this?
- people with disability are allowed to digitally record audio without the other consent? So even though hearing aids are illegal, the people with difficult hearing can still use them?
edit: I'm specifically asking about the U.S. in general, but am also curious about how laws outside of U.S. interpret this as well