In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 84, No. S1 ( 1988-11-01), p. S108-S108
Kurzfassung:
Students in firearms classes wore either their regular earmuff or a prototype nonlinear earmuff during firing practice. Audiograms were performed before and after firing to detect TTS. Dosimeters were used to measure Leq noise exposures and peak SPLs for two ammunition types (mean peak = 159 dB, standard deviation = 4.1 dB). Individuals shot an average of 110 rounds, with exposure affected by all 10–12 class members. Audiometric results showed no mean TTS for wearers of the linear earmuff, and a small but statistically significant mean TTS at 4, 6, and 8 kHz for wearers of the nonlinear muff (means & gt; 3 dB, standard deviations & gt; 5.5 dB). Although the nonlinear muff was not as protective against higher peak SPLs, students' questionnaire responses showed that they preferred the nonlinear muff for understanding speech, especially students with preexisting hearing loss.
Materialart:
Online-Ressource
ISSN:
0001-4966
,
1520-8524
Sprache:
Englisch
Verlag:
Acoustical Society of America (ASA)
Publikationsdatum:
1988
ZDB Id:
1461063-2