SOUND DETECT & SOUND DETECT PRO USER MANUAL
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8-14 Real-time Acoustic Analysis
Real-time analysis results are shown at the top right of the Display Window.
The level in decibels of sound arriving from the strongest sources, up to 3, are
presented (see Section
8-11 Cursors & Sound Pressure Levels (SPLs))
. The
Display Window also provides additional information about problems related to
the specific application.
Generally, the device is used for either leak detection (locating and estimating
the size of compressed air leaks) or partial discharge detection (locating and
analyzing partial discharges in electrical applications).
8-14-1 Air Leak Detection
The device must be set to Gas Leak Mode to detect compressed air leaks (see
Section 8-6 Application Modes and Section
8-6-2 Gas Mode Settings
).
The device detects compressed air leaks based on the sound emitted by the
leak. When a leak is detected, the device estimates the size of the leak. The user
must enable the gas leakage level calculation in the equipment.
8-14-1-1 Exclude Reflected Sound
Background noise can disrupt acoustic inspections. Users should test inspection
areas from different angles. If a sound source is steady, then it is most likely an
actual sound source. Reflected sound appears to drift or disappear when be
captured from different positions.
SELECT THE APPROPRIATE MODE BEFORE CAPTURING MEDIA OR
PERFORMING ACOUSTIC ANALYSIS.
8-14-1-2 Exclude Noise
Environmental noise in the low frequency band can cause false positives. To
find the true sound source, ICI recommends using middle or high frequency to
capture the position of sound sources. A relatively narrow band range is also
suggested as it can eliminate interference noise.
Users may also use the focus tool to eliminate environmental interference noise,
reflection noise, multi-source interference, etc. (see
Section 8-12 Focus Tool
).
8-14-1-3 Specific Power
The specific power is a measure of how much energy is needed to produce a
certain amount of compressed air. The unit is measured in kW/m³/min.
