Auditory processing of spectral modulations produced by early reflections

Jörg Buchholz

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

In dichotic tone-in-noise masking experiments it has been shown that adding a forward fringe to the masker leads to a significant masked threshold (MT) decrease. With reference to simultaneous room reflection masking (i.e., a test reflection masked by the direct sound), it has been shown that for very short reflection delays (8ms) the detectability of the test reflection is binaurally enhanced [Buchholz, JASA, 2005]. Considering the auditory processes underlying room reflection masking, increasing the reflection delay on the one hand changes the spectral and temporal characteristics of the stimulus and on the other hand produces an increasing forward fringe (i.e., a reflection-free direct sound interval). Throughout this study, it is investigated to what extent the auditory processes underlying simultaneous room reflection masking utilize the information provided by (a) the reflection-free direct sound interval and (b) the actual reflection interval. In this regard, an additional forward fringe was added to the direct sound, and dichotic and diotic MTs for broadband noise were measured in dependency of the reflection delay, the reflection duration, and the forward fringe duration. The results reveal that the effect of binaural suppression of reflections is significantly increasing with increasing reflection duration, leading to a binaural suppression effect of about 10dB for 320ms long reflections and to no suppression effect for 20ms long reflections. Moreover, adding a forward fringe led to a decrease of binaural suppression of reflections for reflection durations below 160ms.
Original languageEnglish
Title of host publicationProceedings of the International Congress on Acoustics
VolumePPA-07-014
Publication date2007
Publication statusPublished - 2007
Event19th International Congress on Acoustics - Madrid, Spain
Duration: 2 Sept 20077 Sept 2007
Conference number: 19

Conference

Conference19th International Congress on Acoustics
Number19
Country/TerritorySpain
CityMadrid
Period02/09/200707/09/2007

Fingerprint

Dive into the research topics of 'Auditory processing of spectral modulations produced by early reflections'. Together they form a unique fingerprint.

Cite this