... five Mandarin vowels [a], [i](yi), [u](wu), [e], and [o](wo) with four tones: the flat tone (tone 1), the rising tone (tone 2), the falling and rising tone (tone 3), and the falling tone (tone ... of speech In this work, we show that the representation of the time-varying properties of speech may benefit from using the values of pitch and formants to set the order of the FrFT Different order ... representation of the envelope, that is, the formant structure, of voiced speech Therefore, the aim of the mel-scale subband integration (and, additionally, the truncation of the sequence of cepstral...