<SPAN class=quoted1>Could I use this to distinguish human voices from
machine beeps and/or ambient noise etc, by (after a few adaptations) calling
it a number of times on the same set of samples with some representative set
of frequencies? Or is there a better, less CPU-torturing way to do
that?<BR><BR>> -----Original Message-----</SPAN><BR><SPAN
class=quoted1>> From:
asterisk-users-bounces@lists.digium.com</SPAN><BR><SPAN class=quoted1>>
[mailto:<A class=fixed onmouseover="status='Compor Mensagem
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On Behalf Of </SPAN><BR><SPAN class=quoted1>> Roger
Schreiter</SPAN><BR><SPAN class=quoted1>> Sent: Thursday, March 02, 2006
5:50 AM</SPAN><BR><SPAN class=quoted1>> To: Asterisk Users Mailing List -
Non-Commercial Discussion</SPAN><BR><SPAN class=quoted1>> Subject:
[Asterisk-Users] Milliwatt Analyzer available</SPAN><BR><SPAN
class=quoted1>> </SPAN><BR><SPAN class=quoted1>> Hi,</SPAN><BR><SPAN
class=quoted1>> </SPAN><BR><SPAN class=quoted1>> some days ago
we discused here the need for an analyzer for</SPAN><BR><SPAN
class=quoted1>> the 1000 Hz tone, as opposite application to
Milliwatt.</SPAN><BR><SPAN class=quoted1>> </SPAN><BR><SPAN
class=quoted1>> Here it is: Mwanalyze </SPAN><BR><SPAN class=quoted1>>
<A class=fixed
href="https://webmail.moebius.com.br/util/go.php?url=http%3A%2F%2Fplaninternet.net%2Fdownload%2Fvoip%2Fasterisk%2Fapp_mwanalyze.c&Horde=e627900c3463e0a83f6492865c62b0c5"
target=_blank>http://planinternet.net/download/voip/asterisk/app_mwanalyze.c</A></SPAN><BR><SPAN
class=quoted1>> </SPAN><BR><SPAN class=quoted1>> It performs a Fourier
analysis for a fixed frequency and</SPAN><BR><SPAN class=quoted1>> tells
the amplitude.</SPAN><BR><SPAN class=quoted1>> </SPAN><BR><SPAN
class=quoted1>> The frequency is not limited to 1000 Hz, but can be
passed as</SPAN><BR><SPAN class=quoted1>> argument. The periode duration
must be a mulitple of 0.5 ms, </SPAN><BR><SPAN class=quoted1>> thus the
valid frequences are: 2000 Hz, 1000 Hz, </SPAN><BR><SPAN class=quoted1>>
666.666666667 Hz, 500 Hz, ...</SPAN><BR />
<BR />
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