Ogura Masaki, Kawase Tetsuaki, Kobayashi Toshimitsu, Suzuki Yôiti
Department of Otolaryngology, Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Int J Audiol. 2003 Sep;42(6):297-302. doi: 10.3109/14992020309101321.
Diplacusis is defined as the phenomenon of hearing the same tone at different pitches in the two ears. Although binaural pitch-matching using method-of-adjustment has been employed in most studies, it is sometimes hard for subjects with impaired hearing to judge 'equal pitch' as one frequency. To resolve this problem. a modified pitch-matching test, in which the relation of pitch sensation between the two ears was assessed as a matched frequency 'range' using the randomized maximum likelihood sequential procedure, was developed. Eight subjects with unilaterally impaired hearing, as well as eight normal subjects, were examined to evaluate this new test procedure. In the present method, matched frequency is assessed as a frequency range, in which subjects cannot judge whether the pitch of the signal in one ear is higher or lower than that in the opposite ear. This method appeared to be useful for assessing the characteristics of diplacusis in subjects with impaired hearing as well as in normal subjects.
复听被定义为两只耳朵听到相同音调但音高不同的现象。尽管大多数研究采用了使用调整法的双耳音高匹配，但听力受损的受试者有时很难将一个频率判断为“等音高”。为了解决这个问题，开发了一种改良的音高匹配测试，其中使用随机最大似然序贯程序将两只耳朵之间的音高感觉关系评估为匹配频率“范围”。对八名单侧听力受损的受试者以及八名正常受试者进行了检查，以评估这种新的测试程序。在本方法中，匹配频率被评估为一个频率范围，在这个范围内受试者无法判断一只耳朵中信号的音高是高于还是低于另一只耳朵中的音高。这种方法似乎有助于评估听力受损受试者以及正常受试者的复听特征。
