Spectral flatness measure is the ratio of ______ and _____(a) Variance, Geometric mean(b) Geometric Mean, Variance(c) Arithmetic mean, geometric mean(d) Geometric mean, arithmetic meanI had been asked this question by my school teacher while I was bunking the class.My question is from Characteristics of Speech Signals topic in division Speech Coding of Wireless/Mobile

Spectral flatness measure is the ratio of ______ and _____(a) Variance

1.	Spectral flatness measure is the ratio of ______ and _____(a) Variance, Geometric mean(b) Geometric Mean, Variance(c) Arithmetic mean, geometric mean(d) Geometric mean, arithmetic meanI had been asked this question by my school teacher while I was bunking the class.My question is from Characteristics of Speech Signals topic in division Speech Coding of Wireless/Mobile
Answer» Right answer is (c) ARITHMETIC MEAN, geometric mean Best explanation: Spectral flatness measure is defined as ratio of arithmetic to geometric mean of the samples of the PSD taken at UNIFORM intervals in frequency. Spectral flatness measure is a qualitative measure of the theoretical maximum coding GAIN that can be obtained by exploiting the nonflat characteristics of speech spectra.

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