Marler, Peter and Konishi, Masakazu and Lutjen, Ann and Waser, Mary Sue (1973) Effects of continuous noise on avian hearing and vocal development. Proceedings of the National Academy of Sciences of the United States of America, 70 (5). pp. 1393-1396. ISSN 0027-8424 http://resolver.caltech.edu/CaltechAUTHORS:MARpnas76
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Continuous loud noise 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 deafened 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.
|Additional Information:||Copyright © 1973 by the National Academy of Sciences. Contributed by Peter Marler, February 27, 1973. We thank Dr. Nottebohm for performing deafening operations and for extensive criticism and discussion. This work was supported by grants from N.I.M.H. (M.H. HD 14651) and N.S.F. (GB12729).|
|Subject Keywords:||single-unit recording; noise-induced deafness; auditory feedback; masking noise; vocalization deficits|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||23 Jan 2006|
|Last Modified:||26 Dec 2012 08:44|
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