Characteristics of the audiometric 4,000 Hz notch (744,553 veterans) and the 3,000, 4,000, and 6,000 Hz notches (539,932 veterans) (Record no. 2435)
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| fixed length control field | 02010nam a22001817a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20150529122406.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 150529b xxu||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | National Acoustic Laboratories |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Wilson, Richard H. |
| 245 ## - TITLE STATEMENT | |
| Title | Characteristics of the audiometric 4,000 Hz notch (744,553 veterans) and the 3,000, 4,000, and 6,000 Hz notches (539,932 veterans) |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc | The purpose of this study was to examine the prevalence and characteristics of audiograms that are notched (1) at 4,000 Hz and (2) at 3,000, 4,000, and/or 6,000 Hz. Bilateral audiograms from 1,000,001 veterans were obtained from Department of Veterans Affairs archives; after “cleaning” algorithms were applied, 744,553 participants (mean age = 63.5 yr) were included in the 4,000 Hz notch analysis (group 1) and 539,932 participants (mean age = 62.2 yr) were included in the 3,000, 4,000, and/or 6,000 Hz notch analysis (group 2). A notch was defined when the threshold at the notch frequency (3,000, 4,000, or 6,000 Hz) minus the 2,000 Hz threshold and the threshold at the notch frequency minus the 8,000 Hz threshold both were greater than or equal to10 dB. In group 1, 77.1% did not have a notch at 4,000 Hz. In group 2, 65.3% did not have a notch at 3,000, 4,000, or 6,000 Hz; 12.4% had bilateral notches, 11.7% had left ear notches, and 10.7% had right ear notches. The notches were about twice as deep on the low-frequency side of the notch than on the high-frequency side. The mean left ear and right ear notch depths were about the same (23 dB), with mode notch depths in the 15.0 to 17.5 dB range. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | audiogram, bilateral, hearing loss, high-frequency, multisite, noise exposure, noise notch, notched audiogram, unilateral, veterans. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Rachel McArdle, |
| 773 0# - HOST ITEM ENTRY | |
| Relationship information | Volume 50, Number 1, 2013 Pages 111–132 |
| Title | JRRD |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/174/Characteristics.pdf?sequence=1&isAllowed=y">http://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/174/Characteristics.pdf?sequence=1&isAllowed=y</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Universal Decimal Classification |
| Koha item type | Journal article |
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