The present study was undertaken to evaluate the noise attenuation characteristics of different types of Ear protective Devices which are commonly used. 20 healthy normal subjects’ open and closed hearing thresholds (with the usage of ear protective device) were recorded in an anechoic chamber and the attenuation charactaristics at 8 discrete frequencies were analysed and compared. Though the attenuation given by different types of ear protective devices are variable and not the ideal, still the present generation of devices have shown satisfactory attenuation characteristics, It is important that proper selection, fitment and usage of these devices should he carefully thought of prior to its usage.
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Rao, A.B., Rao, B.P. A critical analysis of attenuation effects of different types of ear protective devices. Indian J Otolaryngol 43, 210–213 (1991). https://doi.org/10.1007/BF02994584
- Protective Device
- Attenuation Effect
- Attenuation Characteristic
- Noise Induce Hearing Loss
- Hearing Protector