I seem to be experiencing a problem with the silence detector on the latest RadioBOSS release. Why is it that when it's set to the defualt silence threshold, it doesn't activate? I have to set it to a minimum of -25.0db in order for it to function even though it's clearly not receiving any audio signal that would constitute the system to believe it is receiving a signal of -70.0 or lower. Is there some inherit noise perhaps that's keeping it from detecting the silence below -25.0?