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Low frequency signals contribute very little to the total speech signals.

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Low frequency signals contribute very little to the total speech signals.

(a) True

(b) False

This question was posed to me in an interview for internship.

This question is from Characteristics of Speech Signals in division Speech Coding of Wireless/Mobile

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The correct answer is (b) False

Best explanation: Lon term averaged PSD’s of speech show that high frequency signals contribute very little to the total speech energy. However, high frequency components are insignificant in energy, they are very important carriers of speech information.

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