Re: How does an RMS detector work?

MRW wrote:
I'm currently delving into audio stuff. I was wondering how exactly
does an RMS detector work. I can picture how a peak detector works,
but if you send a speech signal to an RMS detector, how does it
compute the RMS value?

Also, does attack time dictate the time period for RMS calculations?

It squares the signal (converting it to a unidirectional signal by the transformation), averages that with a low pass filter, and then takes the square root of the low passed signal. RMS means square Root of the Mean of the Square of a signal. Mean is a way of saying average over some time.
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