Electronically controlled high fidelity ear protector e.g. ear muffs, for use by musicians during concerts, has controller limiting maximum sound level of sound transmission from microphone to earphones by about eighty five decibel

摘要

The ear protector has a customized otoplastic provided with earphones. A controller limits maximum sound level of sound transmission from a mini high fidelity (Hi-Fi) microphone to the earphones by about 85 decibel.