The past few weeks I've been hearing lots of long periods of noise on the main Trumbull Fire channel, 33.56. Enough to break squelch and sometimes lasting several minutes. Tonight I'm hearing the same thing on one of their secondary channels, 33.76. Any ideas what could be causing that? I've check a few things in the house but the noise doesn't seem to be coming from anything I can identify. Sometimes it doesn't last very long so it is a little difficult to try to pin down a cause in the house or the immedaite area..Same thing on two different scanners although both are on the same antenna.