如何用MEMS麦克风估算声强？

喜


我一直在寻找一种使用MEMS麦克风估计声强的方法很长一段时间。我正在使用带有MEMS麦克风的STM32F4DISCOVERY板（它是MP45DT02）。我写了一个应用程序，使用这个麦克风接收声音，将其写入缓冲区并使用ST提供的库将其从PDM转换为PCM。到目前为止，它与ST给出的程序非常相似 - “音频播放和录音”。后来我使用快速傅立叶变换来获得信号频谱。
我需要估计声音的振幅如何反映在光谱的条高度上。数据表是适度的，甚至没有任何说明。我该如何解决这个问题？
＃mp45dt02-MEMS麦克风傅立叶



以下为原文




hi,


I've been looking for a way to estimate sound intensity using MEMS microphone for a very long time. I am using STM32F4DISCOVERY board with a MEMS microphone on it (it's MP45DT02). I wrote an application that receives sound using this this microphone, writes it into a buffer and converts it from PDM to PCM using library given by ST. So far it works very similar to a program given by ST - ''Audio playback and record''. Later I use fast fourier transform to get the signal spectrum.
I need to estimate how the amplitude of the sound will be reflected on the spectrum's bars height. The datasheets are modest or even say nothing about it. How can I solve the problem?   
#mp45dt02-mems-microphone-fourier