نتایج جستجو برای: threshold shift
تعداد نتایج: 255776 فیلتر نتایج به سال:
The present study involved performing an experiment to clarify whether vibration measurement values on the tool handle, in accordance with ISO 5349-1, can assess risk from workplace environments. investigated relationship between magnitude of a hand-held electric drill different operating postures. included determination participant’s temporary threshold shift (TTS) vibrotactile perception (VPT...
Granit (1943, 1944) observed that the threshold of retinal ganglion cells in the cat drops when they are allowed to dark-adapt after exposure to bright lights, and that there is a shift in spectral sensitivity analogous to the Purkinje shift in the human. The drop in threshold was rather small compared to that found in human dark adaptation, and the final threshold reached was not nearly as low...
BACKGROUND AND OBJECTIVES Gingko biloba extract is known for enhancing blood circulation, scavenging free radicals, and antagonizing against platelet-activating factor. This study evaluated the effect of Gingko biloba on the noise-induced temporary threshold shift of hearing. MATERIALS AND METHODS Temporary threshold shift was induced by exposing mice to 110 dB SPL sound for 1 hour. The exper...
Introduction: Conductive hearing loss due to chronic otitis media (COM) can be treated by surgery. COM, however, may be associated with functional damage to the inner ear. Sensorineural hearing loss (SNHL) due to COM has been found to be significant by some authors, whereas it has been considered negligible by others. The present study aimed to answer the question Does COM cause SNHL ? Methods...
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