The most popular approach to water leak detection is to use acoustic/vibration sensors or pressure transducers attached to the surface of a pipe. When two sensors are used, the leakage location can be determined by estimating the time difference through correlation of the receive signals. An electronic leak detector is equipped with a transducer that is sensitive to sounds coming from a system of pipes. If a sound registers on the machine, it is transmitted to the security system at a higher frequency. The principle of sound is what is used to detect leaks in pipes using an electronic leak detector.