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目前的电影还音系统，除了数字还音外，一般仍采用把激励光刃照射到声带上，用硅光电池接收透过声带的光信号；然后把该光信号转换成电信号，再把电信号放大，推动扬声器，从而得到观众听到的声音。也有先把声带用均匀光照射，通过光学系统把声带的像成到隙缝处，再用光电...
The current movie still sound system, in addition to digital still sound, the general still used to stimulate the light blade is irradiated to the vocal cords, with silicon photovoltaic cells through the vocal cords to receive optical signals; then the optical signals into electrical signals, and then the electrical signals Zoom in and push the speaker to get the sound the audience heard. There are also the first vocal cords with uniform light irradiation, through the optical system to the vocal cords into the gap, and then photoelectric ...