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The frequency domain of a voice signal is normally continuous because voice is a
nonperiodic signal.
Frequency corresponds to the 'pitch' of the voice.
The sounds in a little girl's voice have higher frequencies than the sounds in an adult man's voice.
And the sound of a whistle has a higher frequency than the sound of a tuba or foghorn.
mood
The frequency band 300 Htz to 3400 Htz is alloted for voice channel. That's it
The fundamental frequency and pitch of the voice.