Attenuation of earmuffs used simultaneously with safety spectacles in exposure to impulse noise
Journal Title: Bulletin of the Military University of Technology - Year 2018, Vol 67, Issue 1
Abstract
Impulse noise is particularly hazardous to the hearing of exposed individuals. In many real-life scenarios, the only protective measure used to reduce the level of impulse noise is hearing protectors. These scenarios include firing ranges. Aside from hearing protectors, shooters use personal safety spectacles. The purpose of this paper was to determine the effect of the simultaneous use of earmuffs and safety spectacles on the sound attenuation of earmuffs during exposure to impact noise. The research was completed with the MIRE method and included the determination of sound attenuation changes in five different models of earmuffs, used simultaneously with three different models of safety spectacles and prescription glasses. The impulse noise source used was a starting pistol, which generated C-weighted peak sound pressure level at a mean of 136.7 dB. The tests demonstrated that the simultaneous use of safety spectacles and earmuffs reduces the impulse noise attenuation of the earmuffs by up to 9 dB. Such sound attenuation changes occurred during simultaneous use of earmuffs with safety spectacles, which feature temples with a rectangular cross-section. The tests also demonstrated that the effect of prescription glasses on sound attenuation was unusually high; prescription glasses reduced the impulse sound attenuation of earmuffs by as much as 18 dB. Keywords: acoustics, noise protection, impulse noise, hearing protectors, earmuffs, noise attenuation<br/><br/>
Authors and Affiliations
Emil Kozłowski, Rafał Młyński
Keywords
Related Articles
- EP ID EP345737
- DOI 10.5604/01.3001.0011.8033
- Views 77
- Downloads 0
Air defense planning for an area with the use of very short range air defense sets
This paper presents a heuristic method of planning the deployment of very short-range anti-air missile and artillery sets (VSHORAD) around an area (‘protected area’) in order to protect it. A function dependent on the di...
Mobile facilities of military infrastructure for accommodation of soldiers
This issue is a subject of works and studies at the Civil Engineering and Geodesy Faculty of the Military University of Technology. The presented proposals of the modern facilities meeting the NATO standards are based on...
Analysis of the BP-150M barrier carrying capacity according to MLC standards
The article includes an analysis of the possibility of a temporary combined crossing using the DMS-65 bridge construction and the BP-150M floating barge support. In order to shorten the construction time of the crossing,...
Symulacja pracy systemów z kolektorami słonecznymi dla rzeczywistych danych meteorologicznych
Artykuł dotyczy analizy efektywności energetycznej systemów z kolektorami solarnymi stosowanymi do podgrzewania ciepłej wody użytkowej. Nowatorskie podejście polega na analizie wartości chwilowych przepływu ciepła dla rz...
Analiza zachowania tarczy żelbetowej z wykorzystaniem modelu hipotetycznego materiału zastępczego
W pracy zawarto analizy numeryczne tarczy żelbetowej modelowanej z wykorzystaniem hipotetycznego modelu jednorodnego materiału zastępczego. Wyznaczono parametry statyczno-odkształceniowo-wytrzymałościowe materiału zastęp...