I found that the sound of drilling can evoke deep worry in dental patients.
我发现钻牙的声音会使牙科患者深感忧虑。
2
A special chip called a digital signal processor analyses the incoming sound from microphones placed close to the dental drill.
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。
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.