The voice that seems to be harmless turned out to have considerable impact damage to hearing. Xiaoming Zhou of East China Normal University and Michael Merzenich of the University of California was testing methods of destruction of sound.
Usually involves destruction by hearing a voice that can measure whether one can detect a faint sound or not. However, recent studies say that the sound of anything in a long time can damage hearing.
Both researchers were testing the present invention using a mouse. Rats were given a voice 65 decibels for 10 hours, then there was silence for 14 hours. This is done for two months so that rats can absorb noise and quiet work environment.
The result, mice was significantly slower in distinguishing sounds in comparison with mice that have not entered the trial. The mice also had less activity in their brains in response to sound stimuli.
"The high level of noise that damages hearing, but the sound in the medium level will not break. This is why the damage can not be detected in previous studies," said Zhou.
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