Perception of across-frequency interaural level differences

The Journal of the Acoustical Society of America
Tom Francart, Jan Wouters

Abstract

The interaural level difference (ILD) is an important cue for the localization of sound sources. Just noticeable differences (JND) in ILD were measured in 12 normal hearing subjects for uncorrelated noise bands with a bandwidth of 13 octave and a different center frequency in both ears. In one ear the center frequency was either 250, 500, 1000, or 4000 Hz. In the other ear, a frequency shift of 0, 16, 13, or 1 octave was introduced. JNDs in ILD for unshifted, uncorrelated noise bands of 13 octave width were 2.6, 2.6, 2.5, and 1.4 dB for 250, 500, 1000, and 4000 Hz, respectively. Averaged over all shifts, JNDs decreased significantly with increasing frequency. For the shifted conditions, JNDs increased significantly with increasing shift. Performance on average worsened by 0.5, 0.9, and 1.5 dB for shifts of 16, 13, and 1 octave. Though performance decreases, the just noticeable ILDs for the shifted conditions were still in a range usable for lateralization. This has implications for signal processing algorithms for bilateral bimodal hearing instruments and the fitting of bilateral cochlear implants.

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Citations

Nov 18, 2011·The Journal of the Acoustical Society of America·Christopher A Brown, William A Yost
Oct 15, 2013·The Journal of the Acoustical Society of America·Alan KanMatthew J Goupell
Mar 25, 2010·The Journal of the Acoustical Society of America·Catherine M SicilianoKatharine Mair
Apr 6, 2013·The Journal of the Acoustical Society of America·Matthew J GoupellRuth Y Litovsky
Nov 18, 2011·The Journal of the Acoustical Society of America·Tom FrancartJan Wouters
Sep 6, 2014·The Journal of the Acoustical Society of America·Kerrie L PlantRobert S Cowan
May 23, 2015·The Journal of the Acoustical Society of America·Christopher A Brown, William A Yost
Sep 20, 2016·Trends in Hearing·Justin M AronoffDavid M Landsberger
Jul 21, 2017·Cochlear Implants International·Lidwien C E VeugenA John van Opstal
Nov 28, 2017·International Journal of Audiology·Dimitar SpirrovTom Francart
May 4, 2017·The Journal of the Acoustical Society of America·Thomas JoubaudChristophe Langrenne
Jul 2, 2018·The Journal of the Acoustical Society of America·Maaike Van EeckhoutteTom Francart
Sep 29, 2018·Journal of the Association for Research in Otolaryngology : JARO·Tom FrancartThomas Wesarg
Aug 7, 2019·Journal of the Association for Research in Otolaryngology : JARO·Justin M AronoffJulia Stelmach
Aug 3, 2021·Hearing Research·Tom Gajecki, Waldo Nogueira
Oct 30, 2021·Journal of Speech, Language, and Hearing Research : JSLHR·Snandan SharmaMarc M van Wanrooij

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