Hi,
I am looking to build a volume velocity source for measuring acoustic and vibro-acoustic transfer functions. The design will use a ~15ft 2" ID hose with a nozzle that has a microphone mounted to it to measure the source strength. The tube diameter is to act as an omnidirectional point source up to 2-3 kHz and the reason for the length is to decrease the length mode resonance so it is lower in frequency and the peaks are spaced more closely.
My question is what sort of driver should I use to drive this to high sound levels from 100Hz to 3kHz? My initial thought was to use a compression driver as that is what several commercially available volume velocity sources use. The issue with this seems to be getting something that will drive high levels below 200-300Hz. However the celestion Axi2050 seems promising. Are there better options for compression drivers that could do this or maybe less expensive options? Or maybe I would get higher levels or better results from something other than a compression driver?
I'm not very concerned with distortion levels or linearity as I will only be looking at output/input transfer functions so all of that will be accounted for. I am mostly looking to be able to drive the highest levels I can.
I'd love to hear people's thoughts on this one.
Also I wasn't sure on the right sub-forum for this so feel free to move it if I have picked the wrong one.
I am looking to build a volume velocity source for measuring acoustic and vibro-acoustic transfer functions. The design will use a ~15ft 2" ID hose with a nozzle that has a microphone mounted to it to measure the source strength. The tube diameter is to act as an omnidirectional point source up to 2-3 kHz and the reason for the length is to decrease the length mode resonance so it is lower in frequency and the peaks are spaced more closely.
My question is what sort of driver should I use to drive this to high sound levels from 100Hz to 3kHz? My initial thought was to use a compression driver as that is what several commercially available volume velocity sources use. The issue with this seems to be getting something that will drive high levels below 200-300Hz. However the celestion Axi2050 seems promising. Are there better options for compression drivers that could do this or maybe less expensive options? Or maybe I would get higher levels or better results from something other than a compression driver?
I'm not very concerned with distortion levels or linearity as I will only be looking at output/input transfer functions so all of that will be accounted for. I am mostly looking to be able to drive the highest levels I can.
I'd love to hear people's thoughts on this one.
Also I wasn't sure on the right sub-forum for this so feel free to move it if I have picked the wrong one.