Hi ya'll!! This post may be a little strange, but I'll ask anyway. We're getting ready to put a used Electrovert H-500 out on our floor. We currently have a old Hollis Poly-clean. When you look at the blowers on a Poly-Clean compared to the blowers on the H-500, the H-500's blowers look about twice as big...and the Hollis is kinda' loud...but people don't complain too much when it's running...I don't know about the H-500 though. The sound suppresion foam on the inside of the H-500 needs replacing, it's deteriorated quite a bit. But there's a person here that is suggesting that instead of replacing the foam, look into "white noise" generators. This person says that when they were in a machine shop environment, "white noise generators" were amazing as far as lowering the decible level of the machines. I have to plead ignorance on this subject. Do any of you have any knowledge about this? Or have any first hand experience with "white noise generators"? Myself, I think we should just replace the sound suppression foam, but this person swears that "white noise generators" is the way to go (but they can't tell me where I can find this stuff)...if that is true, where do I go to get these generators (speakers and certain frequency sources I assume)? Is there such equipment? I've searched the web, but can't find anybody that sells this stuff (makes me more confidant that I should just replace the sound suppresion foam). Is this just a bunch of gobble-dee-gook or what? -Steve Gregory- ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################