Acoustics. Hearing protectors - Method for estimation of noise reduction using fitting by inexperienced test subjects Ingestion-build-46800 and lets you demonstrate to

and lets you demonstrate to clients

the described test methods may be applied more reliably for comparative testing a number of appliances at approximately the same time

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Acoustics. Hearing protectors - Method for estimation of noise reduction using fitting by inexperienced test subjects Ingestion-build-46800 and lets you demonstrate to1 Scope This Technical Specification specifies a method for measuring noise reduction of passive hearing protectors at the threshold of hearing. The method is designed to provide estimates of the noise reduction obtained by typical groups of users in real world occupational settings, who may lack the training and motivation to wear hearing protectors in an optimum manner. The principle of the test method is to measure the difference in hearing