Acoustic Logging
Acoustic Logging is a method of determining the location of a leak in a water main, by placing listening devices at known distances along the main.
Multiple acoustic loggers are placed on the surface fittings such as fire hydrants and valves and each logger records the noise level of the water main over a series of short intervals.
The distance between the acoustic loggers is recorded and a program can use this information to chart of the location of water leaks. The loggers can be used to identify leaks in both property services and water mains.
Acoustic logging is probably most useful in sandy soils where even large leaks may not become apparent on the surface.
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