Sir, Apropos the proposed explanation for the intolerance of noise in the psychiatric patients by Andrade(2000). I wish to supplement following relevant information in this context and offer an alternative hypothesis. 1. Middle ear does not play any role in the modification of the loudness of sound. In human beings the acoustic reflex i.e. reflex contraction of the stapedius muscle in response ...

excessive exposure to noise can lead to noise-induced hearing loss. otoacoustic emissions affect the microscopic biomechanical activities of healthy outer hair cells. the present study aimed at assessing the influence of various sound pressure levels on distortion product otoacoustic emissions (dpoaes) in rats. to this end, 27 adult male rats with an age range of 3 to 4 months and a weight of 2...

Real-world sounds like speech or traffic noise typically exhibit spectro-temporal variability because the energy in different spectral regions evolves differently as a sound unfolds in time. However, it is currently not well understood how the energy in different spectral and temporal portions contributes to loudness. This study investigated how listeners weight different temporal and spectral ...

INTRODUCTION The use of Personal Digital Audio Players can cause hearing injuries, as the sound is generated directly in the ear canal. It is believed that different types of headphones can cause different amplifications, since they cause changes in the volume and resonance of the ear canal according to their depth. OBJECTIVE This study aimed to determine the sound pressure to which young ind...

introduction: noise is one of the hazardous factors in work places such as  textile industries. the objective of this study is to determine noise pollution in textile industries in kermanshah (2001). materials & methods: this study is  an analytical-descriptive one. the study was done in 2 steps. in the first step the characteristics of the work place & buildings were completely determined; the...