Accuracy in sound localization: interactive effects of stimulus bandwidth, duration and rise decay

  • Sharon M. Abel Mount Sinai Hospital, Toronto, Canada
  • Chetan S. Gujrathi Mount Sinai Hospital, Toronto, Canada
Keywords: Acoustic noise, Acoustic waves, Bandwidth, Frequencies, Loudspeakers, Subjective testing, Precedence effect, Sound localization, Speaker identification, Stimulus duration, Stimulus rise decay

Abstract

This study investigated the effects of stimulus bandwidth/centre frequency (broadband noise vs one-third octave bands, centred at 500 Hz and 4000 Hz), in interaction with stimulus duration/rise decay time (50/10, 300/10, 300/50 and 380/50 ms) on sound localization. The experiment was conducted in a semi-reverberant sound proof booth. Twelve normal-hearing subjects were tested using a single array of six loudspeakers positioned 60 deg apart in the horizontal plane. Each was presented one block of 120 forced-choice speaker identification trials for each for the twelve listening conditions. Subjects achieved 100% correct in localizing broadband noise, regardless of duration/rise decay. Scores were significantly lower for the one-third octave bands. There was no difference due to frequency for the three longer durations. For the short duration/short rise decay, a relative improvement was observed for the low frequency and a decrement for the high frequency. The results were interpreted with reference to the precedence effect.
Published
1997-06-01
How to Cite
1.
Abel SM, Gujrathi CS. Accuracy in sound localization: interactive effects of stimulus bandwidth, duration and rise decay. Canadian Acoustics [Internet]. 1997Jun.1 [cited 2019Oct.16];25(2):27-0. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1073
Section
Technical Articles