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Speech signal can be categorised in _____ and ______(a) Voiced, unvoiced(b) Active, passive(c) Direct, indirect(d) Balanced, unbalancedThis question was posed to me in a job interview.Question is taken from Vocoders in section Speech Coding of Wireless/Mobile

Answer» CORRECT option is (a) Voiced, unvoiced

To explain: Speech signal is of TWO TYPES, voiced and unvoiced. Voiced sound is a result of quasiperiodic vibrations of the vocal CHORD. Unvoiced signals are fricatives produced by turbulent air FLOW through a constriction.


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