Whats the loudest valves???

i have 4 herin 1" valves on my 02 edge and they r loudest one's that i've heard

i got the heron at ekmw

PARKERS ARE THE LOUDEST

I've had 1/2" Parkers and now I have 1/2" Asco. I think the Asco valves are louder. They echo soooo loud.