[NJblue]

When I am in the guest bathroom I hear a constant, rapid sound that sounds like it could be dripping inside a wall or other enclosed area. I cannot isolate exactly where the sound is coming from other than I can only hear it while in this room. To see if it is indeed a plumbing issue I have turned off the main supply to the house, opened up all faucets and shower valves throughout the house and drained the toilet tank (including towl drying it). Even with all of these measures I still hear the sound at the same rate (more than one per second).

The only remaining source of water in the bathroom is the remnant of what is in the toilet bowl. However, after an hour and a half, this water level has not dropped at all. I would think that if this is causing the sound, the water level would go down at least a little based on the tempo of the "dripping".

Has anyone else experienced this or have a theory about its source? Given the measures that I have taken to determine the cause, I am beginning to wonder if it may be something other than a plumbing issue. I even thought it may be the ticking of a hidden clock but the tempo is faster than once per second.