短音のピッチ認識に及ぼす後続音の効果に関する検討
A study on effect of trailing tone on recognition for pitch of a brief tone

Susumu Kitamori
1983 Acoustical Science and Technology  
Interference effects of a trailing tone on recognition for pitch of a brief tonal signa1 ( S。 )presented earlier in time are investigated . In the experiments reperted here , all of the experimental conditions are varied randomly , and a salne − different procedure is employed . The proportion of co τ rect reliponses is measured as a func. tion of the silent intertone interva1( . 4t)between the Sc and the trailing tone , the trailing tone durat 三 〇n , and the frequency separation between the
more » ... tion between the signal and trailing tone , Furthermore , the temporal growth course of recognition accuracy of S。 are discussed . The d ' value of signal detection theory is e 皿 ployed as a エneasure of the recognition accuracy . The results obtained are as follows: ( 1 ) The percent correct recognition for pitch i皿 proves w 三 th increa 忌 es in rit , but becQme du 重 1 for the long At of about 150 msec . ( 2 ) The interference produced by the trailing tone is independent of its duration 、 ( 3 )The interference produced by the con . tralateral trailing tone is as ' effeetive as the ipsilatera 工 one . ( 4 ) The interference produced by the trailing tone seems to vary with the frequency separation between the signal and trailing tone over 200 Hz . ( 5 ) The imp τovement in the recognition accuracy of Sc can be well fitted with the equation a ( tp ) ; α { 1 − exp ( − tp! τ ) } ,where a ( tp ) is the recognition accuracy Qf Sc, tp is the presentation time including both the duration of Sc and ∠1 彦 ,α is a finite asymptQte , and τ is 、 a ti皿 e constant , 1, ま え が き
doi:10.20697/jasj.39.2_82 fatcat:qbv6jg4znresxlw32jevfcsgl4