Methods:Continuous noise of a tank during moving and impulse noise at shooting in the field as well as hearing threshold shift of crew in tank were measured.

Method: Based on the statistics analysis of 103 guinea pigs temporary threshold shift(TTS),drawed frequency distribution graph of left and right TTS mean,investigated the regularity of distribution,decided the susceptible and unsusceptible noise-induced hearing loss guinea pigs with normal distribution method,study the rationality of this method.

After launching, temporary threshold shifts for each frequency were lower than.

Aim: To observe the combined effects of four physical factors(noise, lighting, temperature and humidity) on temporary threshold shift (TTS).

Method:The auditory threshold of 120 children with cleft palate were detected by electrical response audiometry.

An analysis of psychological factors on hearing threshold and its variation of alternate binaural loudness balance;

Objective To lind out the situations of the hearing loss,which differ from the people without hearing impair- ment in hearing threshold and the balance between ears on their level.

Methods The animal models of secretory otitis media were established by injecting platelet activating factor(PAF)into the middle ear of guinea pigs in order to understand the hearing threshold and the pathologic changes of middle ear and Eustachian tube mucisa.

Effects of two frequencies infrasound exposure on auditory threshold in guinea pigs;

Results In the pure acoustic test of auditory threshold on two groups,the difference of auditory threshold had significance in the all.

Objective The latency and auditory threshold of the cochlear action potential N 1 [AP(N 1)] were observed systematically after infrasound exposure (125 dB) in guinea pigs.

Auditory Threshold After Infrasound Exposure in Guinea Pig;