Re: How does an RMS detector work?
- From: Rudolf Drabek <newsrudy@xxxxxx>
- Date: 31 May 2007 02:39:13 -0700
On 31 Mai, 00:28, John Popelish <jpopel...@xxxxxxxx> wrote:
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.
Correct. Take a MC1496 4quadrant multiplier and build your own RMS
meter.
Take care for the crest factor!
.
- References:
- How does an RMS detector work?
- From: MRW
- Re: How does an RMS detector work?
- From: John Popelish
- How does an RMS detector work?
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