Acoustic Rt60 with labview

[r1ick31]

Hello, I have an Ni usb-4431 and an IEPE microphone, I wonder if there any way to calculate the reverberation time using labview.

[santo_13]

You've got the proper hardware to capture acoustics. For the software part, could you please share any known math behind processing the signal to calculate reverberation? Btw, you also need a sound source, how are you doing that?

[dsb@NI]

Hopefully, you weren't waiting on this much-delayed response.

You could start with the Sound and Vibration Example VI: Sound Level Meter (DAQmx).vi, configure the sound level meter per ISO 3382, record sound level data while the sound level is on and then decaying (when you turn source off), use cursors or your own automated algorithm to measure the time (RT60) for the total band power to drop by 60 dB.

Recommendations include taking multiple measurements at multiple locations. 

The Sound and Vibration Assistant included an example project that computed reverberation time for one recording. Sadly, this SignalExpress example project (.seproj) was never converted to a LabVIEW sample project (lvproj).

If you found or created a more direct way to make RT60 measurements in LabVIEW, please share!