The Effect of Envelope or Carrier Delays on the Precedence Effect

Authors: Terada, Kiyoaki; Tohyama, Mikio; Houtgast, Tammo

Source: Acta Acustica united with Acustica, Volume 91, Number 6, November/December 2005 , pp. 1016-1020(5)

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Abstract:

Listeners who hear a pair of acoustic stimuli, such as a speech signals from two different directions with a short delay in between, tend to perceive a fused sound from the direction of the first sound to arrive (the precedence effect). As the delay between signals increases, however, the two sounds are perceived as multiple sounds that reflect the directions of the lead and lag sounds (sound image separation). The present experiments on the perception of sound images used pairs of speech signals that included time delays on either their envelopes for each 1/4-octave band, or the carriers, or both. The speech was wide band, low-pass, or high-pass filtered. The results were consistent with a two process model. A low frequency process produces the precedence effect using carrier delays and image separation using envelope delays. A high-frequency process produces both effects, but only from envelope delays.

Document Type: Short communication

Publication date: 2005-11-01

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Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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The Effect of Envelope or Carrier Delays on the Precedence Effect

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