The Background Noise Absorber allows the user to accurately measure equipment noise by
“eliminating” background noise. The Sound Level Meter first stores the background noise as a
reference level. From there, when a sound is measured, the display will show the sound level
measurement minus the background noise. To operate the meter in BA mode, follow these steps:
1. Power the meter.
2. Press the MAXHLD key (the MAX HOLD icon will appear on the LCD).
3. Press the BA key (‘F” will appear to the left of the SPL display icon).
4. Press the MAX HOLD key again (the MAX HOLD icon will reappear on the LCD).
5. The meter is now displaying the background, reference noise.
6. Power the device under test and note the new sound level meter reading.
7. If the reading changes, the new reading is the sound level of the device. If the reading does not
change, the noise produced from the device is either equal to or less than the background
noise.
8. Press the BA key again to return to the normal mode of operation
The Background Noise Absorber allows the user to accurately measure equipment noise by
“eliminating” background noise. The Sound Level Meter first stores the background noise as a
reference level. From there, when a sound is measured, the display will show the sound level
measurement minus the background noise. To operate the meter in BA mode, follow these steps:
1. Power the meter.
2. Press the MAXHLD key (the MAX HOLD icon will appear on the LCD).
3. Press the BA key (‘F” will appear to the left of the SPL display icon).
4. Press the MAX HOLD key again (the MAX HOLD icon will reappear on the LCD).
5. The meter is now displaying the background, reference noise.
6. Power the device under test and note the new sound level meter reading.
7. If the reading changes, the new reading is the sound level of the device. If the reading does not
change, the noise produced from the device is either equal to or less than the background
noise.
8. Press the BA key again to return to the normal mode of operation
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