2
Introduction and Scope
This manual covers the principles in acoustic leak detection for the following
products produced by Palmer Environmental.
Lmic (pronounced El Mike) Low cost leak sounding system
Gmic (pronounced Gee Mike) Ground microphone - leak sounding system
Rmic (pronounced Are Mike) Road microphone - leak sounding system.
The basics in the general operation are the same but each system has its own
advantages.
Lmic
is designed as a low cost lightweight system which is simple to use yet highly
effective in the detection the sources of leak noise in industrial, commercial and even
household situations and can be used as a tool as part of a plumbing tool kit.
Gmic
is a more sophisticated piece of equipment containing filters and the option of
aviation headphones. This combination provides the operator with a highly effective
listening device with the ability to virtually eliminate unwanted or interfering ambient
noise.
Rmic
has the features of the Gmic but has the additional capability of being able to
use an acoustically shielded ground microphone foot for use in all weathers
especially high wind. The Rmic foot virtually eliminates the noise produced in bad
weather conditions and is especially suited for use on hard road surfaces, tarmac,
concrete etc.
The following section provides an introduction to the methods of acoustic leak
detection.
