I am trying to determine the differences is the sound level on a RAW Hm1000x in .22 cal. with the stock moderator and a couple of Donnyfl moderators. I have a Extech sl510 to do this. It's being done in a soundproof room so as not to disturb the neighbors. The problem is the meter is registering the same db, (92-93), with or without the moderator. All the settings on the meter are correct. "A" weighting, fast response, and I'm using the peak mode. It should be reading somewhere in the 70's with it on but is doesn't. I called the manufacture and the store that it was purchased from -- no help from either source. Before it's sent back I'm trying to find out exactly what's wrong. The meter is put 6 inches from the muzzle. Has anybody that has a sound meter had a problem like this? Thank you.
hotair
hotair