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Title: Leak locating microphone, method and system for locating fluid leaks in pipes

A leak detecting microphone inserted directly into fluid within a pipe includes a housing having a first end being inserted within the pipe and a second opposed end extending outside the pipe. A diaphragm is mounted within the first housing end and an acoustic transducer is coupled to the diaphragm for converting acoustical signals to electrical signals. A plurality of apertures are provided in the housing first end, the apertures located both above and below the diaphragm, whereby to equalize fluid pressure on either side of the diaphragm. A leak locating system and method are provided for locating fluid leaks within a pipe. A first microphone is installed within fluid in the pipe at a first selected location and sound is detected at the first location. A second microphone is installed within fluid in the pipe at a second selected location and sound is detected at the second location. A cross-correlation is identified between the detected sound at the first and second locations for identifying a leak location.
 [1];  [2]
  1. (Oak Park, IL)
  2. (Highland Park, IL)
Issue Date:
OSTI Identifier:
University of Chicago (Chicago, IL) ANL
Patent Number(s):
US 5349568
Contract Number:
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
leak; locating; microphone; method; fluid; leaks; pipes; detecting; inserted; directly; pipe; housing; opposed; extending; outside; diaphragm; mounted; acoustic; transducer; coupled; converting; acoustical; signals; electrical; plurality; apertures; provided; located; below; whereby; equalize; pressure; installed; selected; location; sound; detected; cross-correlation; identified; locations; identifying; acoustic transducer; electrical signals; electrical signal; fluid pressure; selected location; leak detecting; /367/73/