Sound localization acuity in the cat Effect of azimuth,….pdfVIP

Hearing Research, 36 (1988) 221232 Elsevier HRR 01133 Sound localization acuity in the cat: Effect of azimuth, signal duration, and test procedure Rickye S. Heffner and Henry E. Heffner Lobornlory of Cornpornrive Heorin6 Bureau oj Child Research. Uniuerrify of Kansas. Porions. Kansas, U,XA (Received 22 January 1988; accepted 14 July 1988) The sound localization acuity of cats was determined at O O . 30. 60°, and 90D from the median sagittal plane for four durations of noise bursts usinl: two behavioral procedures. Similar thresholds were also ohlained for humans. The cats averaxe thresholds for a 40 n,. no~%r.hur.1 r.gnged irvm 4 h at L o *rtt~.uthto L O 21 Y G C . t ~ ~ r n u tCo~i~p~taSIch tl.rcahnld, L,r ht~rn~ri;lnyed [ram 1 3 .+I 0 1. 9.7 21 90 Ihr. fa;[ that human3 and .at hdd r ~ m ~ lthrcrhuldrl r at 4 drltnulh ruucrl, lh:#t lhe m.h.lcplnnac ~i thc ;dl .. are not an advantage in localizing sound in the lateral fields. Varying the duration of the stimulus from 10 rns to continuous had little effect on threshold. No diiierence was found between the results of the two behavioral prafedures. Binavrol cues; Pinna; Localization, front/hack; Psychophysical methods; Cat; Human Introduction differences (Roth et al., 198O), its directionality results in a strong effect on interaural inensity The domestic cat has long been used in the differences especially at high frequencies (Calford study of the anatomy and physiology of the central and Pett