Power density spectrum of speech

in article snipped-for-privacy@mb-m18.aol.com, Herbert Blenner at snipped-for-privacy@aol.com wrote on 11/6/03 12:48 AM:

Does that not depend upon the language being spokent? :=)

Bill

Only if they are from a different planet.

Herbert

Really?? Wouldn't there be male/female difference - or child/adult difference - or a basso-profundo/soprano difference - or even say a German/Swahili difference?

To my tin ear they sure sound like there would be a marked difference in power density and frequency.

Your are hearing individual or singular characteristics of speech.

My interest lies with typical characteristics of human speech. For example a vibrating vocal cord produces a harmonic series of tones. Physiological structures modify these vibrations and produce amplitude and angle modulated oscillations. A pair of mirror image sidebands each consisting of a continuous distribution of frequencies would be centered about each individual tone of a harmonic series.

Herbert

...Or one of the primitive tribes whose language is best known for its characteristic clicking sounds.

Harry C.

Hi Herbert, I did run across some audiographic studies from Bell Labs for researching my masters thesis on echo cancellation circuitry . The characterizations were done over along period of time to determine acceptable bandwidth for speech communications in teleconferencing. This was a long time ago but I know they might have the data your looking for. These studies were done in the 1970's. They may have models that made in into the Bell pubs.

EE

Your suggestion sent me searching through my closets for old textbooks. I found a few from the sixties and seventies that had many spectrograms of speech. Perhaps the people at bell labs weren't kidding when the asserted petty cash financed their graphics department.

Thanks for your idea.

Herbert

Herbert, if you are still stuck or in need of up-to-date info, try the Audio Engineering Society

HTH, Cameron:-)

Interesting photo on society's homepage.

Would I know you by another name?

Herbert

No.. don't think so. I was a member once, but that was a few years ago now. :-)

If you are into "all things audio", it could be well worth you joining - their conferences and tradeshows are really, really good and are supported by the biggest names in the business.

Good luck with your research!

Cameron:-)