Pupilary light reflex , physiological function of rod and cone , photosensory transduction mechanism of rod ; sound transmission in middle ear and microphonic potential 瞳孔对光反射、视锥视杆细胞的生理功能、视杆细胞感光换能机制；中耳传音功能和微音器电位。
3.
Most present acoustic level gauges use a sound generator which can produce high - power acoustic waves and a microphone which can detect the echo signal . the fluid level can be worked out based on the artificial analysis of the echo curve 目前正在应用的井下液位测量仪器，主要是通过爆炸声源产生大功率声脉冲信号，利用微音器接收回波信号，人为地对回波信号曲线进行分析来估算液位。
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Which kind of does choice usage tiny , is to choose the right voice the proceeding the voice the different way for learning up processing . the tiny of user , stereo set system may have very and severely of acceptance of persons , but certainly make them at veto a certain and tiny the to before and first try and see . don t wanting to forget other programing may need the different way 选择使用哪一种微音器，就是选择对声音进行声学上加工的不同方式。对于微音器，音响系统的使用者可能有极强烈的偏爱，但一定要使他们在否决某种微间器之前先试一试。不要忘记其他节目可能需要不同的方式。
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Choice and enlarger the number that match process the equipments with loudspeaker . for example , you enlarger that choose with loudspeaker , possible demand the number process the equipments the proceeding the electronics filter to handle . if have to choose is not a voice to defend loudspeaker to give something back to arrange the way , and can then consider to choose the appropriate and tiny to proceed to rectify 选择与放大器和扬声器相匹配的讯号加工设备。例如，你选择的放大器和扬声器，可能需要讯号加工设备进行电子过滤处理。如果不得不选择不是防声音回馈的扬声器布置方式，则可考虑选择适当微音器进行补救。
