Which device detects the sound of a leak?

• A. Ultrasonic Leak Detector
• B. Microfoam Solution
• C. Trace Gas Detector
• D. Electronic Leak Detector

Answer: (A)

Leaks create a noise as pressurized gas escapes, and some of that noise sits in ultrasonic frequencies that humans can’t hear. An ultrasonic leak detector is built with a sensitive microphone and electronics to pick up those high-frequency sounds, then translate them into an audible signal or a readout. By moving the detector around the suspected area, you can find the spot where the sound is strongest, pinpointing the leak source quickly, even in walls or behind insulation.

Other methods rely on visible changes or chemical senses rather than listening: microfoam shows leaks by bubbles forming at the opening, trace gas detectors look for trace amounts of a special gas used to trace leaks, and electronic leak detectors sense gas molecules with sensors but don’t listen for sound. The ultrasonic device is the one designed to detect the sound itself.