电容式麦克风怎么看参数?

2025-03-16 07:19:17
推荐回答(2个)
回答1:

这一下子说不完的,呵呵,你自己去看看的吧,叫我打字的,打到明天都打不完的呢

麦克风规格的参数

http://wenku.baidu.com/link?url=Mk5nT54Zk5Mt3Y8JbmC0fiDn49pChs5BzM4P8ga-5vmYxpo6Ozqh7anu0vFjewyGNuh3v7lfp9RHi9LWRI4UbmUn8EUBX5u5MQN0lK8L4pi

回答2:

音头:采用的器件类型,电容式麦克风目前最普遍。
频响:表示能接受的频率范围,光凭这个参数不够,这个范围只是表示在30Hz-20kHz频带内灵敏度在一个可接受范围内,但是这个范围并没有一个公认的值,因此更好的描述是频响曲线。不过对于人声,对频响的要求其实很低,过宽的频响反而会录进一些不需要的环境噪声。
灵敏度:1kHz单位声压输入时输出的值,一般在-30dB到-50dB,其实这个值本身意义并不太大,因为麦克风都会经过放大器和AD转换的。
指向性:心形指向性指对正面灵敏度最高,背面最低。适合对确定的目标录音,如果用于电话会议之类就要多个麦克风。
输出阻抗:影响后端设备匹配问题。
负载阻抗:后端设备的阻抗不能小于这个值,否则输出会下降。
等效噪声级:无声音输入的时候麦克风本身的输出噪声,是非常重要的参数,麦克风能够”清晰录制的声音“取决于录制的声音和噪声的差值,也有用信噪比(SNR)描述这个特性的,SNR=94-Noise。即此麦克风信噪比为76dBA。
最大声压:能够接受的最大的声音,如果超过这个值,总谐波失真(THD)会急剧增大。这也是一个很重要的参数。
转载自知乎ace zh的答案

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