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Re: noise indicator
>I have just joined the list.
Welcome to the list. Your idea of the noise indicator sounds truly great!
I think I'll try to apply it to Rosario, Argentina (my city). There are
several corners downtown which I call "acoustical trashcans", since more
than 85 dBA can be measured most of the time.
I'll try to help you with the electronics. I believe a better solution is
to use a peak detector (or RMS detector, if available and more precision is
needed--the AD536 beeing the cheapest IC RMS converter available) and
comparators, instead of a level indicator, after the mic amplifier. The
comparators should then drive the relays or electronic switches (SCR's, for
I could send you a block diagram of this idea in case you need it.
Universidad Nacional de Rosario
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