Simultaneous translation changed all that.The speaker talks into a microphone linked to a sound- proof booth (interpreting booth)just off the assembly room floor.There the interpreter speaking into a second microphone translates the speech for the benefit of those who don't understand the original language,all of whom wear an ear-piece (耳塞)no bigger than a hearing aid(助听器)，Simultaneous translation changed all that. The speaker talks into a microphone linked to a sound￾proof booth (interpreting booth) just off the assembly room floor. There the interpreter speaking into a second microphone translates the speech for the benefit of those who don’t understand the original language, all of whom wear an ear-piece (耳塞)no bigger than a hearing aid(助听器)