Hi,
We have purchased 2 microphone no. 4939 1/4 inch, 4226 Multifunction acoustic calibrator and 2690 Nexus conditional amplifier. This instruments are enough to measure frequency spectrum from high speed model jet flow. Is there anything need to buy for getting spectrum. Please explain how to use conditional amplifier for noise measurement.
snipped-for-privacy@gmail.com wrote in news:17fb97fe-3373-4cbc-88be-d60d9fd36bd0 @a8g2000prf.googlegroups.com:
What you bought will give you accurate waveforms that can be calibrated, but will not transform them into the frequency domain. For that you need an FFT analyser, or you could use a soundcard and a PC and an appropriate program.
Cheers
Greg Locock
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