Pneumatic whistles

I just picked up a couple of these off EBay for $65.00 I’ve heard them before and there something different.Question is can I run them at my horn PSI 150 or would I gave to regulate them down?

I dont know too much, but I think from what I have read, that they eat lots of air. You may need to get a bigger tank? They are cool tho:D

Whistles don’t get damaged when they are ran at a high pressure. They use a lot of air though.