- Tytuł:
- Noise reduction at the shooting range by means of level-dependent hearing protectors
- Autorzy:
-
Młyński, Rafał
Kozłowski, Emil - Powiązania:
- https://bibliotekanauki.pl/articles/2162681.pdf
- Data publikacji:
- 2019-06-14
- Wydawca:
- Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
- Tematy:
-
impulse noise
earplugs
attenuation
earmuffs
noise reduction
level-dependent hearing protectors - Opis:
- Background The aim of the tests was to establish the possibilities of reducing impulse noise by using level-dependent hearing protectors at a shooting range. The tests included 9 models of level-dependent earmuffs and 2 models of level-dependent earplugs. They were conducted in the presence of impulse noise generated by 7 types of firearms (pistols, a submachine gun, rifles, a shotgun). Material and Methods The tests were conducted at an outdoor shooting range, using an acoustic test fixture that meets the requirements of the ANSI/ASA S12.42-2010 standard. Noise parameters were established for the noise reaching the microphones installed in the ear simulators of the acoustic test fixture: uncovered and protected by the tested hearing protectors. Results All 11 tested level-dependent hearing protectors allow to satisfactorily (below the exposure limit values) reduce the C-weighted peak sound pressure level and A-weighted maximum sound pressure level parameters of noise produced during shots from the 7 types of firearms included in the study. Moreover, in the most unfavorable case, the permissible number of impulses due to the value of the A-weighted noise exposure level normalized to an 8-h working day parameter exceeds 5000 per day. Conclusions Level-dependent hearing protectors constitute the appropriate means to protect the hearing of people at a shooting range, while maintaining the functionality of these protection devices to transmit speech signals. Med Pr. 2019;70(3):265–73
- Źródło:
-
Medycyna Pracy; 2019, 70, 3; 265-273
0465-5893
2353-1339 - Pojawia się w:
- Medycyna Pracy
- Dostawca treści:
- Biblioteka Nauki