For the last month, I have a vibrating sound low in volume, but strong enough to hear clearly sounding like a motor or a pump. I turned off the power and also shut off the water, but to no avail...the sound continues. It is so hard to sleep and ear plugs help. I checked in the crawl space and did not hear it. The sound is hard to locate, but may be coming from the garage. I hear the sound in most of the home, but stronger nearer to the garage. Right now late in night, it is really humming. No signs of leaking pipes. I am stumped and so wish to cut that sound out. What to do, who to get (plumber or electrician) and how to find the source of the sound?
According to user LCD, from How do I find out the cause of a low frequency hum in my house?, you can detect the source of the hum with a variety of methods:
- Check that others can hear the noise. Other family members, neighbors, etc.
- Make a cone listening device with something like a sheet of paper that you can hold up to your ear. This will help you to better narrow down the location that the sound is coming from.
- Use a stethoscope (you can find one pretty cheap at a drugstore), preferably with a metal head. Use this to try to further locate the source of the sound. Place the stethescope on pipes, walls, floors, radiators, vents, etc. Be careful not to come into contact with electricity as you're doing this.
- Turn off circuit breakers (individual, or the master). If the master breaker stops the hum, then use the individual breakers, one-by-one until the hum returns. If you find the circuit that the hum is on, start tracing that circuit.
- Turn off water supply (individual, or the master).
You might also consider using an app on your phone meant for monitoring audio or showing "spectrograms". This might help you to visualize the frequency of the hum.
The above listed reference also includes a variety of potential sources that are worth checking to help identify the potential source.