Quantitative parameters which describe speech sound distortions due to inadequate dental mounting

Quantitative measurement of speech sound distortions with the aid of minimum variance spectral estimation method for dentistry use

“…We must also underline that the MVSEM introduced in this paper gives clear and expressive information about the speech sounds quality and the speech sounds alteration, as by the Fourier transform, the wavelet transform and the spectrogram analysis, used in the previous papers (Drȃgȃnescu et al 2003(Drȃgȃnescu et al , 2006Sinescu et al 2008). This is also evident if Figure 3 is compared with Figures 2 and 4.…”

“…The aim of this paper is to continue the investigations done in our previous papers (Drȃgȃnescu et al 2003(Drȃgȃnescu et al , 2006Sinescu et al 2008) to establish some quantitative parameters from the analysis of the speech sound to build a sensitive method to establish the correct placement of the dental prostheses, which sensitively express the minimal distortion of speech sounds. In these papers, quantitative parameters have been introduced that reflect, in an accurate manner, invariant personal characteristics of the human voice extracted from power spectra (Drȃgȃ-nescu et al 2003), fractal Hurst exponent and wavelet spectrum (Drȃgȃnescu et al 2006), Shannon's entropy, wavelet and time -frequency analysis (Sinescu et al 2008).…”

“…In these papers, quantitative parameters have been introduced that reflect, in an accurate manner, invariant personal characteristics of the human voice extracted from power spectra (Drȃgȃ-nescu et al 2003), fractal Hurst exponent and wavelet spectrum (Drȃgȃnescu et al 2006), Shannon's entropy, wavelet and time -frequency analysis (Sinescu et al 2008).…”

“…In these papers (Drȃgȃnescu et al 2003(Drȃgȃnescu et al , 2006Sinescu et al 2008), it can be seen that the Fourier transform, the wavelet transform and the spectrogram give complex forms. These forms are difficult to interpret and estimate quantitatively.…”

An experiment with spectral analysis of emotional speech affected by orthodontic appliances

“…It is valid mostly for lingual appliances [1,2]. Similar effect had been studied also for dental prostheses [3][4][5][6][7]. However, since articulation together with phonation and respiration is affected by physiological changes accompanying emotional arousal of a speaker [8], it might be expected that different emotions manifest differently in speech uttered while wearing the orthodontic appliances.…”