Perfect, I was just not using the right terms in my search. This explains it very well, and even includes some discussion of how this can cause amplification to start clipping on one side of the waveform before the other.
Thank you! Nick On 14 September 2018 at 13:38, Walter Underwood <wun...@wunderwood.org> wrote: > I searched for “asymmetrical speech waveforms” and found this. > > "The other element involved in this is that many acoustic sources > inherently have a 'positive air pressure bias' because of the way the sound > is generated. To talk or sing, we have to breathe out, and to play a > trumpet, we have to blow air through the tubing. So, in these examples, > there is inherently more energy available for the compression side of the > sound wave than there is for the rarefaction side, and that can also > contribute to an asymmetrical waveform." > > https://www.soundonsound.com/sound-advice/q-why-do- > waveforms-sometimes-look-lop-sided > > wunder > K6WRU > Walter Underwood > CM87wj > http://observer.wunderwood.org/ (my blog) > > On Sep 14, 2018, at 1:24 PM, Nicklas Johnson <n...@n6ol.us> wrote: > > An audio engineering friend noticed in some voiceover recordings something > that I've also noticed in my own waveforms, that a lot of the time, human > vocal cords seem to produce a biased waveform (seemingly a positive bias > most of the time). > > I vaguely remember reading either here on this list, or maybe in QST, > something about this as it relates to setting microphone gain (and bias) so > that the resulting modulated signal is making more efficient (I'm probably > not remembering the right word) use of the available amplitude (ie, not > hitting the peak early on the positive side, but falling well below it on > the negative side). > My Google-foo isn't working out for me today though; does anyone remember > an article or posting on this topic and/or have a link to it? I haven't > been able to track it down again. > > Nick > -- > *N6OL* > Saying something doesn't make it true. Belief in something doesn't make it > > > -- *N6OL* Saying something doesn't make it true. Belief in something doesn't make it real. And if you have to lie to support a position, that position is not worth supporting. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
