Since last year I've been hearing something similar in the milair band. The mode is WBFM; I've heard phone calls, kids playing in a pool with Mom holloring to stop slopping water all over, music from where?. The signals start out weak, get strong very quickly, and usually last a couple of minutes if that. I thought it was my Stridsberg amp mixing with some other signals; but I've picked up these signals just about everywhere I traveled in Berks County in the mobile without an amp. Also hear them on other scanners & radios. Since the phone calls are analog, it shouldn't be cell phone or cordless phones as they should be digital. Here is a list of freqs I've heard them on; really a mystery as to where they are coming from, but always in the WBFM mode:
262.5 - 263.1 - 264.3 - 265.5 - 266.1 - 266.7 - 268.5 - 269.125 - 269.975 - 273.9 - 286.5 - 296.7
I don 't think it's a pirate link as these signals are really strong when they come in compared to the pirates on satcom. There's no set time when they come in; only in for a few minutes then fade out, maybe a half hour later in again & out; really stange!