A special chip called a digital signal processor analyses the incoming sound from microphones placed close to the dentaldrill.
在牙钻附近安置了麦克风，一种称为数字信号处理器的特殊芯片会对麦克风中获取的声音进行分析。
2
When he had things arranged on the table, he pulled the drill toward the dental chair and sat down to polish the false teeth.
桌上东西码好了，他就把牙钻拉到牙科椅边上，坐上椅子磨起假牙来。
3
Noise-reduction headphones block the screech of the drill and play a CD of your choice, and the specially constructed dental chair channels the sound waves from the music into a full-body massage.