Frankly, I am a "very" beginner in sound measurement with LabView 8.2.
My program have to measure the pressure (already done) and stethoscope sound(similar to heart beat) for blood pressure measurement.
I found the sampling rate could be less than 1 kHz for pressure using USB DAQ.
But, I have no idea for sound measurement except that..
(I have to identify the start / end points of sound rather than detail waveform.)
First, I have to prepare some sensors for stethoscope sound.
Generally, what kind of "micro" sensors for sound measurement?
(For example about application,
http://www.ymec.com/hp/signal2/heart1.htm Is there any selection guide for sound measurement?
Second, I am worring about data aquisition.
As I mentioned earlier, I have to measure two signals simultaneously (time-synchronized).
To my knowledge, the sound should be faster than 10 kHz.
Can I use a (good) specification sound card for my purpose or general NI-DAQ USB card?
Third, Is any sound card support the LV programming? or any other toolbox such as NI-RealTime?
(I know only there is an add-on toolkit of sound data analysis *not* aquisition from NI.)
Thanks.
*)Any complex analysis can be performed after the measurements.
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08-12-2008 03:26 AM에 labmaster에 의해 편집되었음