The effect of additive noise on speech amplitude spectra: a quantitative analysis
Qifeng Zhu, Asraa Sadoon Alwan · IEEE Signal Processing Letters · 2002
This article analyzes the effect of additive noise on speech amplitude spectra, and introduces a method to estimate speech spectra from noisy observations. Estimated spectra are used to compute the Mel-frequency cepstral coefficients as a recognition front-end. Compared to linear spectral subtraction, this technique improves the performance of digit recognition in noise.