Audibility of pitch-synchronously modulated noise

This paper examines the audibility of stationary and cyclostationary narrow-band noise added to voiced speech generated by natural and synthetic excitation. Varying the temporal location of noise within a pitch cycle corresponds to varying its phase spectrum. Exploiting this fact, we find that a change of phase is more perceptible for a low-pitched sound than for a high-pitched sound. Our results support the notion that sinusoidal coders work well for female speech and that CELP coders work well for male speech.