AUDIOLOGY & SLP MATERIALs

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There are probably two closely related key questions that concern people about noise exposure and hearing loss: First, what are the chances of getting a hearing loss from being exposed to some noise for some period of time? Second, how much noise exposure is acceptable before it becomes damaging to hearing? These questions are addressed by damage risk criteria (DRC) , which are standards or guidelines that pertain to the hazards of noise exposure. However, this apparently straightforward issue actually involves many interrelated questions, the answers to which are complicated, not necessarily understood, and often controversial. Some questions deal with the noise and predicting its effects: How should noise be quantified for the purpose of assessing damage risk, and how should we handle different kinds of noises (continuous, impulsive, intermittent, and time varying)? Are there valid and reliable “predictors” of NIHL, and if so, what are they and how are they related to heari...

Contents: A.    NEED OF HEARING CONSERVATION PROGRAMME AND STEPS IN HEARING CONSERVATION PROGRAMME. B.    EAR PROTECTIVE DEVISE Ø TYPES – EAR PLUGS, EAR MAFFS, HELMETS, HELMETS, SPECIAL PROTECTORS, MERITS AND DEMERITS OF EACH Ø PROPETIES OF EPDs Ø EVALUATION OF ATTENUATION CHARACTERISTICS OF EPDs Ø TOUGHENING A.    NEED OF HEARING CONSERVATION PROGRAMME AND STEPS IN HEARING CONSERVATION PROGRAMME.  INTRODUCTION:                             In industry, to prevent the employees from occupational hearing loss, Occupational Safety and Health Administration-Hearing Conservation Amendment (OSHA-HCA, 1983) made a Hearing Conservation Programme (HCP) under Occupational Noise Exposure Regulation Act  1910.95 It is important to differentiate between an HCP that meets the requirements of the OSHA...