| Autor: |
William A. Ahroon, Kimberly B. Lukas, Melinda E. Hill |
| Rok vydání: |
2006 |
| Předmět: |
|
| Zdroj: |
The Journal of the Acoustical Society of America. 120:3161-3161 |
| ISSN: |
0001-4966 |
| DOI: |
10.1121/1.4787872 |
| Popis: |
The American National Standard Method for the Measurement of the Real‐Ear Attenuation of Hearing Protectors (ANSI S12.6‐1997 [R2002]) contains explicit requirements for the physical parameters of the test facility used in measuring the performance of hearing protection devices and in subject selection and device fitting. However, the standard curiously does not provide a similar level of detail when considering the psychophysical procedure used to define ‘‘threshold’’ other than when an automatic recording audiometer is used. Most facilities conducting ANSI‐based measurements of hearing protector performance appear to use a Bekesy tracking procedure, but other methods such as a modified method of limits or a method of adjustment procedure are implemented as well by some facilities. Following several tests of hearing protection over the past year, several examples of large variability caused by very low attenuation results in one or both runs in a few subjects have been noted. The data from these unusual subjects are analyzed and presented along with recommendations for the psychophysical procedures to be included in future versions of the standard. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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