BYR Achieve · 镜像论坛

Re: 六级的高频信号咋这样?

2008/6/28镜像同步0 回复

【在 nan01 的大作中提到: 】 : 我觉得是那女的声音频率太高了，抽样小于那个什么奈奎斯特抽样间隔，所以导致严重失真！！ Let's make a short analysis. At first the speaker's voice was recorded into a digital media. At this point, if the sampling rate wasn't adequate (at least Nyquist rate), the voice would never be able to be reproduced well. And if a noise of high power level was also recorded with the interesting voice, the voice could not play well either. In fact digital voice didn't take up make storage space, so it was unlikely the recording studio would use a very low sampling rate. The next potential problem was the circuits between the broadcast center, where the recorded voice clips were played, and the loudspeakers in exam rooms. The bandwidth should be enough for digital voice, since we could hear other clips clearly. The most probable cause might be that there was a noise mixed with the voice when it was being recorded. ~~

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