Cable channel sound contamination

Hi,
The background to this question is that my wife and I are renting a room out of a larger house. On the owner’s side he has installed a set-top box for viewing some channels in HD and has broadband internet as well as Comcast digital voice phone service.

I used to run and hook-up cable myself, so I see no fault in the way the cable is "T"ed off. The modem is on a dedicated leg away from the cable so it can send and receive signal just fine. There is also a powered amp involved, but signals are at acceptable levels for all runs of coax.

What I’m here for is to ask if anyone has had a situation where the audio from one channel is heard in a manner similar to feedback in the audio of the channel you are watching?

It’s not very loud, but say you are watching a drama on TV and two people are talking… so that dramatic pause happens where there is only silence … it’s at th-at moment you start hearing William Shatner try to save someone money on a f***** hotel room… “mamby-pamby… cupcake… mama’s-boy”… >sigh<

Only 2 channels do this with our cable, 1 channel is within 2 channels of the offending audio. The other channel I have not yet found which channel it is that projects it’s audio onto it.

What would be the most likely reason for such a phenomenon? What can be done- besides calling my cable company? I’m already that far. Thanks in advance.

Possibly some signal ingress from an unshielded cable?

Are the channels that this happens on also broadcast over the air?

No Astroboy,
both channels are within the cable TV range only.

Hmmm… then you got me. We’ve exceeded the limits of my knowledge.

I get this exact thing. I have cable TV with a set-top box, but also a regular roof aerial. The volume on cable tends to be lower than with the aerial signal, so I have the TV turned up. During quiet dramatic moments of a film on pay-per-view, I can often hear crowd noise from Match of the Day or some such inappropriate sound. I just put it down to a quirk of my TV. I assume the circuits aren’t sufficiently isolated or something.