While we speak do we generate multiple frequency simultaneously?
Answers
Interesting question!
Human voice ranges from 400Hz to 3.4kHz. That’s explains the max. rate of transmission in a telephone line - 68kbps (Concept of sampling frequency)
In order to study the human voice, you need to understand the different ways in which a human vocal tract is modelled. Your vocal tract is the a pipe which extends from the larynx to your mouth. It can be considered as a tunnel or a closed pipe which allows air to pass.
The larynx produces the disturbance in the air or what we call the sound. Now this sound can be of different frequencies one of them being a fundamental freq and the others are called as harmonics. The fundamental freq. is often called a pitch. Human males have a lower pitch, females have a higher pitch. So at a given time you can produce multiple frequencies. But only one is the fundamental one and we use this to do the calculations.
In order to study these voice waveforms we use concepts of short time fourier transform, short time energy, pitch period estimation etc.
Source: Speech Processing course which I took in my final year of Electronics and Telecommunication Engineering.
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interesting question !
In physical sense I would say that the waveform of sound , or simply voice or speech is Longitudinal in nature , and not transverse .
The vibrations made by our larynx in trachea , travel via the air medium in the following fashion
In the form of compression and rarefaction.
Now electrically it is detected by the microphone as follows
This is electrical waveform of voice , recognized in Matlab while speaking my name
(Yes the longitudinal sound wave converted into transverse electrical signal /wave)
Now you might think that , this is similar to longitudinal waves ,but no !
On a closer look
It may look like the above.
Yes it can be approximated into sum of various sine waves ( as the popular Fourier series say)
Thanks for the a2a
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Your spoken voice contains many frequencies. The fundamentals are typically between 80 and 640Hz, to mention the singing range of a Bass with four octaves of range. There are harmonics and freqencies well into 16 kHz. Whistle, though, and there is *almost* nothing but a fundamental.
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I have not studied this subject (frequency of human voice), but I guess it is multiple of frequency during talk. Whistle and uniform sunds like aaaaa, hissssss etc may be involving single frequency.
I hope, we get a detailed answer from experts, very soon.
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