what frequencies does a speech envelope contain?
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From: Mark on 1 Apr 2010 21:03 On Apr 1, 2:40 pm, Clay <c...(a)claysturner.com> wrote: > On Mar 31, 10:29 pm, "bharat pathak" <bharat(a)n_o_s_p_a_m.arithos.com> > wrote: > > > I am trying to isolate the silence regions from the speech > > regions. For this I am trying to find the enevelope of speech > > signal and compare it with set threshold value. My question is > > what frequencies does a speech envelope typically contain? > > > What are the typical ways in which people perform the isolation > > of speech signals from the silence regions. Assume in some > > presence of noise. > > > bharat > > POTS (Plain Old Telephone Service) passes just below 300 to just above > 3200 Hz, so expect most of your speech to be in that frequency range. > > Clay the op is asking about the frequency range of the ENVELOPE of SPEECH signals. In hardware terms this would be the bandwidth of the control signal on a voice AGC system. I estimate this would be in the range of below 1 Hz up to maybe 100 Hz. Mark
From: Jerry Avins on 1 Apr 2010 23:56
On 4/1/2010 9:03 PM, Mark wrote: > On Apr 1, 2:40 pm, Clay<c...(a)claysturner.com> wrote: >> On Mar 31, 10:29 pm, "bharat pathak"<bharat(a)n_o_s_p_a_m.arithos.com> >> wrote: >> >>> I am trying to isolate the silence regions from the speech >>> regions. For this I am trying to find the enevelope of speech >>> signal and compare it with set threshold value. My question is >>> what frequencies does a speech envelope typically contain? >> >>> What are the typical ways in which people perform the isolation >>> of speech signals from the silence regions. Assume in some >>> presence of noise. >> >>> bharat >> >> POTS (Plain Old Telephone Service) passes just below 300 to just above >> 3200 Hz, so expect most of your speech to be in that frequency range. >> >> Clay > > > > the op is asking about the frequency range of the ENVELOPE of SPEECH > signals. > > In hardware terms this would be the bandwidth of the control signal on > a voice AGC system. > > I estimate this would be in the range of below 1 Hz up to maybe 100 > Hz. 100 Hz seems a bit high. I asked the OP what he meant, and he hasn't yet answered. Jerry -- "It does me no injury for my neighbor to say there are 20 gods, or no God. It neither picks my pocket nor breaks my leg." Thomas Jefferson to the Virginia House of Delegates in 1776. ��������������������������������������������������������������������� |