The noise module detects points of entry of high-pressure gas into an open borehole by listening for an ultrasonic signature.
Sound energy caused by gas entering the borehole is focused by a conical acoustic mirror within the probe onto a microphone. The microphone is tuned to measure the acoustic energy in a frequency band centred at 40kHz, characteristic of entry of high- pressure gas through a narrow orifice.
|Max. pressure:||Nominal 1MPa. Gas-filled hole only|
|I003952||Ultrasonic noise probe|
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Robertson Geologging Ltd., 2017
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