PXI4461 Calibration Gras BE46 Microphone Sensitivity

[Sam.Huang]

Hi all,

I want to Calibration Gras BE46 Microphone Sensitivity by PXI4461 configured as snapshot,I desired be to realized two type single point & Full Frequency Sweep and get Sensitivity of the Gras BE46.I don't know if right for those.Actually,I am a newbie in acoustic testing.Any prompt reply will be highly appreciated.

[dsb@NI]

It looks like you have the Sound and Vibration Toolkit. Here are some options:

1. Run example which uses calibrator to calibrate microphone at a single test frequency: <LabVIEW>\examples\Sound and Vibration\Calibration\Calibrate Microphone (DAQmx).vi
2. Obtain a reference microphone where you have a known sensitivity, and then, calculate the sensitivity of your microphone by ratio. Refer to <LabVIEW>\examples\Sound and Vibration\Calibration\Calibrate by Reference Accelerometer (DAQmx).vi
3. Calibrate your amplifier and speaker (so that you know the sound pressure level at the measurement location for a given analog output level at the calibration frequency.

In all cases, you are attempting to calibrate your microphone using a known standard.

For measurement of microphone sensitivity across the frequency range of the microphone, you can modify example <LabVIEW>\examples\Sound and Vibration\Audio Measurements\Discrete Swept-Sine Measurements (DAQmx).vi. Use a reference microphone (with known sensitivity and flatness) and your microphone on the ai reference and ai response channels, respectively.