Hello all,
I am using a GRAS 46ae 1/2'' CCP free-field microphone set along with a NI 9250 and CDAq 9171 DSP module. I am using Matlab to acquire and analyze my data. I am new to signal processing and thus have some very basic questions that I could not find the answer to in the equipment documentation:
1) What are the units of my measurement (I think they are in Pascals, but most of the graphs in the microphone manual are shown in dB and I have seen some info in mV).
2) I am getting very low signals when compared to those obtained by some researchers in the same field (in the order of 0.1 units compared to their 10 units) is there some adjustment that can be done to the DSP modules in order to amplify this signal?
3) Last but not least, can someone recommend some very basic website or book for acoustic signal processing?
I thank you all in advance 🙂
Cecilia