A large number of studies have been conducted on the effect of specular reflections on speech reception, but surprisingly little is available on the effect of diffuse ones. This study focuses on the basic conceptual case of a head-related impulse response (HRIR) with a single early reflection, either specular or diffuse, besides the direct sound. HRIRs were measured for several geometries in an anechoic room. Sound fields were auralized and two speech in noise experiments were presented to forty normal hearing participants, using an uncorrelated speech-like spectrum stationary noise as masker at a fixed signal-to-noise ratio of -6 dB. The experiments were designed to investigate the interaction between the quality of reflection (specular vs diffuse) and (i) its temporal delay from the direct sound, (ii) its azimuth.
Effects of a single reflection from a diffusive surface on speech reception
Chiara Visentin;Matteo Pellegatti;Nicola Prodi
2020
Abstract
A large number of studies have been conducted on the effect of specular reflections on speech reception, but surprisingly little is available on the effect of diffuse ones. This study focuses on the basic conceptual case of a head-related impulse response (HRIR) with a single early reflection, either specular or diffuse, besides the direct sound. HRIRs were measured for several geometries in an anechoic room. Sound fields were auralized and two speech in noise experiments were presented to forty normal hearing participants, using an uncorrelated speech-like spectrum stationary noise as masker at a fixed signal-to-noise ratio of -6 dB. The experiments were designed to investigate the interaction between the quality of reflection (specular vs diffuse) and (i) its temporal delay from the direct sound, (ii) its azimuth.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
