In article , Bert Coules
wrote:
"charles" wrote:

Modern aids don't have user controls.

I know what you mean, but it's not strictly true. Models that can be be
programmed with several different response profiles (to accommodate
different situations and varying noise levels) have a small button to
switch between the various modes.

but the better ones are adaptive and decide for themselves when to switch
modes.

--
From KT24

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