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传声器按声作用方式可分为压强式、压差式和复合式三种类型。当振膜一面受到声波作用,另一面被壳体遮挡受不到声波作用,振膜受到的力正比于声压,此时为压强传声器。若其尺寸比声波波长小得多时,压强传声器振膜受到的力与频率无关,且无指向性。当传声器振膜两面都受声波作用,振膜受到的力正比于两面声压的差,此时为压差传声器。在尺寸较小、离声源较远时,压差传声器振膜受到的力与声音频率成正比,当离声源较近时,在低频
Microphone by the role of sound can be divided into pressure-type, pressure-type and composite three types. When the diaphragm side of the sound waves, the other side of the shelter is not affected by sound waves, diaphragm force is proportional to the sound pressure, this time for the pressure microphone. If the size is much smaller than the acoustic wavelength, the pressure applied to the diaphragm of the microphone is independent of frequency and directivity. When the microphone on both sides of the diaphragm by the sound waves, diaphragm force is proportional to the difference between the sound pressure on both sides, this time for the pressure microphone. In the smaller size, far from the sound source, the differential microphone diaphragm diaphragm force and the sound frequency is proportional to the sound source when the closer when the low frequency