Document Detail

Extraction of hearing loss threshold levels and equal auditory risk metric curves of chinchillas from existing exposure data.
MedLine Citation:
PMID:  20330454     Owner:  NLM     Status:  In-Data-Review    
An existing set of chinchilla noise exposure data has been re-analyzed using an advanced signal analysis tool and a statistical regression analysis. The data are comprised of 23 digitally recorded noise files and auditory damage indicators of the chinchillas measured at six frequency points, 0.5, 1, 2, 4, 8, and 16 kHz. From the relationship between the equivalent sound pressure level (Leq) of the six 13 octave frequency components of the noise and PTS of chinchillas, the Leq level that starts to cause auditory damage to chinchillas is identified as a function of frequency. These threshold levels of chinchillas, obtained for the first time in this study, will be useful information to design chinchilla exposure studies. The levels that will cause the same amount of PTS at the six frequencies are also obtained, from which equal auditory risk metric (EARM) curves are constructed. It is shown that a chinchilla version of an advanced noise guideline which enables quantitative, frequency-by-frequency assessment of the risk of a noise can be developed using the EARM curves. Possibility as well as difficulties of developing a human version guideline similar to this chinchilla prototype are discussed.
Wonjoon Song; Steve Goley; Jay Kim
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  127     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1840     Citation Subset:  IM    
Dept. of Mech. Eng., Univ. of Cincinnati, Cincinnati, OH 45221-0072.
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