Leaking pipes somewhere but don't know where

I use a broom stick or dowel place it on the ground then my ear to the dowel.

Yes a 3 or 4’ dowel works better than one you have to kneel down for.

Ipoh are turning the stick into a stethoscope. I listen if I can here water I move on until I can no longer hear the water movement.

I take extra time on sidewalks or driveways as these are places pipe likes to break. In some cases you can hear the flowing water pickup rocks and hit the concrete.

The break can also be under the house. By using this method I have found broken pipes and even located drain pipes under slabs when I did not know where they went having someone tap on the pipe with a wrench or hammer may help you to find it in some cases if it turns and you loose the sound.

If you find a spot the water noise stops turn the water on in the house if you now hear it the break is usually 1-2’ closer to the main, I have had really good luck using a broomstick or even a 1/4” wood dowel I think anything solid would also work to transmit the vibrations.