Marler P, Konishi M, Lutjen A, Waser M S
Proc Natl Acad Sci U S A. 1973 May;70(5):1393-6. doi: 10.1073/pnas.70.5.1393.
Continuous loud noice was used to mask auditory feedback from vocal behavior of male canaries. Single unit techniques demonstrate partial deafness after noise exposure. Longer exposure caused greater deficits, with losses of high-frequency sensitivity. Males raised in noise to 40 days of age, then deafened surgically, thus totally deprived of auditory feedback from vocalization, developed significantly fewer song syllables than birds similarly raised but left intact, to mature in quiet sound-insulated chambers. Males left longer in noise, to sexual maturity at 200 days of age, sang at first like surgically deafend birds, but then increased their song syllable repertoire after noise termination. Thus, in spite of the considerable deafness resulting from noise exposure, the deficit in syllable repertoire was corrected, presumably as a result of restoration of the birds' ability to hear their own song.
持续的噪音被用来掩盖雄性金丝雀发声行为的听觉反馈。单细胞技术表明，噪音暴露后会出现部分失聪。暴露时间越长，听力损失越大，高频敏感度丧失。在噪音环境中饲养到40日龄的雄性金丝雀，然后通过手术致聋，从而完全丧失发声的听觉反馈，与在安静隔音的房间中饲养至成熟的同类鸟类相比，其唱出的歌节明显更少。在噪音环境中饲养时间更长、至200日龄达到性成熟的雄性金丝雀，一开始唱歌像手术致聋的鸟类，但在噪音停止后，它们的歌节曲目增加了。因此，尽管噪音暴露导致了相当程度的失聪，但歌节曲目的缺陷得到了纠正，推测这是鸟类恢复听到自己歌声能力的结果。
