A mathematical model of amplitude vibrato based on novel algorithm

The amplitude of the speech signal is one of the parameters that determines the quality of speech. However, the literature in this subject is limited, mainly because of the speech wave complexity. The main objective of this research is to design and develop algorithms for the calculation of the amplitude of the speech signal, choose samples of good vibrato, apply these algorithms to the samples, analyze the results, and propose a model for the amplitude vibrato. The proposed model describes the characteristics found in 23 of the 24 samples. This model contains two sinusoids and low frequency noise. The power, amplitude, frequency and phase of the model were calculated.