Masking is a necessary part in ABR test the same as other Audiological experiments to obtain the real responses without the intrusion of the other ear. In the current research we are aimed at studying the effect of the masking noise on the pure latency of wave V and interwave latencies of I-III, III-V and I-V. Noise was delivered to the non test ear with intensities of 0, 30, 50 and 70 dB in four different sessions while the intensity level of the stimulus was fixed in all four sessions.

Many pregnant women are exposed to noise in the workplace. Noise can affect both fetus and pregnancy of pregnant women. Hormonal disturbances and nanism are of devastating effects of noise. An increased risk of shortened gestation has been shown in four studies Results. In a third study showed the length of gestation in female infants to be inversely correlated to maternal residential noise exposure. Decreased birth weight has also been associated with noise exposure in pregnant women.Some of the adverse impacts of exposure to noise is discussed here as an investigation report.