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:: Volume 7, Issue 1 And 2 (5 1999) ::
aud 1999, 7(1 And 2): 163-165 Back to browse issues page
selecting the protective ear plugs
Manouchehr Omidvari
Abstract:   (7156 Views)

Exposure to noise is a one of the common problems in any industrial places. Many solutions have been introduced to overcome the deleterious effects of noise pollution maintaining and repairing systems in the equipments, environmental control and hearing conservation systems are some of these solutions that could be mentioned.
There are various types of Hearing protection devices and each one is useful under special circumstances. Commonly, different Hearing protection devices have a particular brochure to introduce information about the manufacturers and the quality of noise reduction in that special production.
Three different methods are commonly used to determine the noise reduction factor in various Hearing protection devices. All these methods have been presented based on the mathematical evaluations and according to the spectral features of the sound existing in the environment and then the sound pressure level is determined in dBA. In the current article we will have a look on the mentioned arithmetic models and their special characteristics.

Keywords: Exposure to noise, Hearing protection devices, arithmetic models
Full-Text [PDF 494 kb]   (2080 Downloads)    
Type of Study: - |
Accepted: 2013/10/26 | Published: 2017/11/8
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Volume 7, Issue 1 And 2 (5 1999) Back to browse issues page
شنوایی شناسی - دانشگاه علوم پزشکی تهران Bimonthly Audiology - Tehran University of Medical Sciences
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