The effect of reverberation, energetic and informative noise on speech release from masking has been studied so far in laboratory, whereas there are few studies that have considered these aspects under ecologic environments. This work shows the effect of very low and very high reverberation time on SRM, with both informational and energetic noise, in real classroom acoustics conditions. Measurements took place in two classrooms with reverberation time of 0.4 s and 3.5 s, respectively. Binaural room impulse responses (BRIRs) were measured at increasing speaker-to-listener distances, locating the noise source at 0°, 120° and 180° from the listener’s head. The BRIRs were convolved with speech and noise anechoic stimuli, and then presented via headphone to adult normal-hearing listeners. Speech reception thresholds were obtained through the ITAMatrix sentence test. In all speech and noise spatial conditions, speech intelligibility was worse under high than low reverberation time and, averagely, under informational masking than under energetic masking, as expected. Unforeseen spatial advantages were found under very low reverberation with energetic masking, and under very high reverberation with informational masking. A large variability across listeners was observed when considering the difference between colocated and separated noise, especially under informational noise. Such aspects still need to be deepened to understand the mechanisms underlying speech perception under real complex auditory scenes.

Spatial advantage from energetic and informational masking in real classrooms with very low and very high reverberation / Puglisi, GIUSEPPINA EMMA; Astolfi, Arianna; Warzybok, Anna; Kollmeier, Birger. - ELETTRONICO. - unico:(2018), pp. 1-1. (Intervento presentato al convegno International Workshop on Neural Mechanisms Underlying Improved Speech Perception tenutosi a Delmenhorst (DE) nel 24-25 September 2018).

Spatial advantage from energetic and informational masking in real classrooms with very low and very high reverberation

Giuseppina Emma Puglisi;Arianna Astolfi;
2018

Abstract

The effect of reverberation, energetic and informative noise on speech release from masking has been studied so far in laboratory, whereas there are few studies that have considered these aspects under ecologic environments. This work shows the effect of very low and very high reverberation time on SRM, with both informational and energetic noise, in real classroom acoustics conditions. Measurements took place in two classrooms with reverberation time of 0.4 s and 3.5 s, respectively. Binaural room impulse responses (BRIRs) were measured at increasing speaker-to-listener distances, locating the noise source at 0°, 120° and 180° from the listener’s head. The BRIRs were convolved with speech and noise anechoic stimuli, and then presented via headphone to adult normal-hearing listeners. Speech reception thresholds were obtained through the ITAMatrix sentence test. In all speech and noise spatial conditions, speech intelligibility was worse under high than low reverberation time and, averagely, under informational masking than under energetic masking, as expected. Unforeseen spatial advantages were found under very low reverberation with energetic masking, and under very high reverberation with informational masking. A large variability across listeners was observed when considering the difference between colocated and separated noise, especially under informational noise. Such aspects still need to be deepened to understand the mechanisms underlying speech perception under real complex auditory scenes.
2018
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2740198
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