Audible reflection density for different late reflection criteria in rooms

Donata Krueger, Cheol Ho Jeong, Jonas Brunskog, Jörg Buchholz

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

2 Citations (Scopus)

Abstract

For reasonably accurate but practical auralizations, some simplifications and approximations are needed. The main issue in the present investigation is that the reflection density of a room impulse response, in theory, increases so fast as a quadratic function of the elapsed time, even assuming only specular reflections. Therefore in this study, the upper threshold for audible reflection density is investigated for four different transition times of 25, 50, 75, and 100 ms through a headphone listening test. Binaural impulse responses and speech signals simulated in three rooms with different characteristics (an empty office, a lecture room, and an auditorium) are used as stimuli. Subjects are asked to increase/decrease the reflection density of a stimulus until they cannot distinguish it from the stimulus that follows the theoretical reflection density for the different transition times in the three rooms. When using binaural impulse responses, the upper limit of the audible reflection density turns out to be limited to 2800 reflections per second. For speech signals, the maximum audible reflection density is shown to be as low as 300 reflections per second, regardless of the room and transition time.

Original languageEnglish
Title of host publicationInter-noise 2012
EditorsCourtney Burroughs, Steve Conlon
Place of PublicationDenmark
PublisherTechnical University of Denmark
Pages2358-2369
Number of pages12
Volume7
ISBN (Print)9781627485609
Publication statusPublished - 2012
Externally publishedYes
Event41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 - New York, NY, United States
Duration: 19 Aug 201222 Aug 2012

Other

Other41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
CountryUnited States
CityNew York, NY
Period19/08/1222/08/12

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