BCM450 system using viking delay paging unit,older Bogen amp. When any user including cordless and IP desk phones page over sets and horns. sets sound find but horns play the page message and a lot of sounds such as wind going across the mouthpiece. It's hard to explain but it's like the mouthpiece is SUPER SENSITIVE and is picking up everything during the page. I have tried the WMT-1A with no change. If you page from an IP desk phone and don't move and press the goodbye key when you finish the page it seems fine. If you page from an IP phone that sits on a desk in the warehouse area it sounds like your paging from a pyle of leaves. Any thoughts let me know.