This suggested method does not apply VAD, one of the methods used before, and directly utilizes voiced and unvoiced sound information in continuous sound section.
Secondly, as explained in the speech generation model, unvoiced sound is excited by random white signals.
Value of modified LSD is checked simultaneously to confirm the function of SNR estimating device in the unvoiced sound sector.
Additionally, the voiced sound /th/ and unvoiced sound
of /th/ can be discovered and studied using the words on the wall.
Analysis of voiced and unvoiced speech segments from Whi-Spe database show that voiced sounds are dominant in normal speech (62.35%), and unvoiced sounds
are dominant in whisper (99.2%).
Since the wave forms of unvoiced sounds
are of stochastic nature (turbulence of airflow in the vocal tract speakers) as it is the noise of the system for recording and transmission of speech, it has got the impact on the fact that the dominant distribution is Gaussian.
Physiologically, the vocal folds must be close together to produce a voiced sound, and wide apart for unvoiced sounds
. This process, as it unfolds in a word, phrase, or sentence, is not always in total synchrony with other articulators functioning simultaneously.
Periodic air pulses passing through vibrating vocal chords make voiced sounds, for example, "a" and "i" while unvoiced sounds
such as "s" and "sh" are created by forcing air through a constriction in vocal tract, producing turbulence that is more noise-like.
For Unvoiced Sounds
(UV):} a different white noise sequence is used.
Thus, the difference between "b," "d," "g," and "p,", "t," "k," which are voiced and unvoiced sounds
respectively, can be heard - or felt - if they are pronounced with one's hands over one's ears; "b," "d," and "g" produce a vibration of the vocal chords ("voicing") that is absent in the pronunciation of "p," "t," and "k."
Stutterers are also slower to make transitions from voiced sounds (when the vocal cords vibrate) to unvoiced sounds
(when the vocal cords do not vibrate).
are produced by turbulent airflow passing through narrow constriction of the vocal tract.