Recruitment phenomenon

Japanese: レクルートメント現象 - レクルートメントげんしょう（英語表記）recruitment phenomenon

Also known as the recruitment phenomenon, this phenomenon occurs when hearing loss is caused by damage to the hair cells of the inner ear. An abnormality occurs in the relationship between the physical intensity of a sound, i.e., the amount of sound energy that can be measured with a measuring device such as a sound level meter, and the sense of loudness that arises when hearing that sound, so that as the sound intensity gradually increases, the sense of loudness of the sound increases abnormally. Subjectively, the person cannot hear soft sounds, but slightly louder sounds reverberate in the ears and seem abnormally loud. When people with hearing loss due to inner ear damage use hearing aids, the sounds often reverberate and sound noisy, and it is often difficult to adjust the amplification of the hearing aids, and this phenomenon is one of the reasons for this.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

補充現象とも呼ばれ，内耳の毛細胞の障害による難聴の際に起こる現象である。音の物理的な強さ，すなわち騒音計のような測定器で測れる音のエネルギーの量と，その音を聞いて生じる大きさの感覚の関係に異常が起こり，音の強さをしだいに増していくと，音の大きさの感覚が異常に増加していく。自覚的には，小さい音は聞こえないのに，少し強い音は異常に大きく耳に響いて聞こえることになる。内耳の障害による難聴のある人が補聴器を使うと，音が響いてうるさく聞こえ，補聴器の増幅度の調節が困難な場合が少なくないが，その理由の一つはこの現象である。

出典　株式会社平凡社世界大百科事典第２版について　情報

<<: Legrenzi, Giovanni

>>: Regulus - Regulus (English spelling)