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Sound Data: Sound Pressure Levels at 7 Meters DB (A)

This document contains sound data measurements for different configurations of a 30GGMC generator set. It provides sound pressure level and sound power level data in decibels across various frequencies for standard, weatherized, and quiet site exhaust configurations. Notes provide information on measurement methodology and conditions, including load, distance from generator, and measurement standards used. Exhaust-only sound pressure levels are also included for an open exhaust configuration without a muffler.

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208 views1 page

Sound Data: Sound Pressure Levels at 7 Meters DB (A)

This document contains sound data measurements for different configurations of a 30GGMC generator set. It provides sound pressure level and sound power level data in decibels across various frequencies for standard, weatherized, and quiet site exhaust configurations. Notes provide information on measurement methodology and conditions, including load, distance from generator, and measurement standards used. Exhaust-only sound pressure levels are also included for an open exhaust configuration without a muffler.

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Anonymous 4Pq2vhjWLV
Copyright
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Sound Data

30GGMC 60Hz

Sound Pressure Levels @ 7 meters dB(A)


Position (Note 1) 8 Position
Configuration Average
1 2 3 4 5 6 7 8
Infinite
Standard-Unhoused (Note 3) 70.7 73 73 72.7 72.1 72.8 72.6 74.2 72.7
Exhaust
F216 Weather w/ Exhaust
79.8 80.4 80.2 78.6 78.3 77.1 76.7 79.9 79.1
Silencer
F217 Quite Site II Second
67.1 66.9 67.4 67 68 65.8 66 68.5 67
Stage

Note:
1. Position 1 faces the engine front at 23 feet (7 m) from the surface of the generator set. The positions proceed around the generator set in a
counter-clockwise direction in 45 increments.
2. Data based on full rated load with standard radiator-fan package.
3. Sound data for generator set with infinite exhaust do not include exhaust noise.
4. Sound pressure levels per ANSI S1.13-1971 as applicable.
5. Reference sound pressure is 10 Pa.
6. Sound pressure levels are subject to instrumentation, measurement, installation and generator set variability.
7. Sound data with remote-cooled sets are based on rated loads without fan noise.

Sound Power Levels dB(A)


Octave Band Center Frequency (Hz) Sound Power
Configuration Level
63 125 250 500 1000 2000 4000 8000
Infinite
Standard-Unhoused (Note 3) 63.9 78.0 89.3 91.8 94.6 93.3 90.3 89.7 99.8
Exhaust
F216 Weather w/ Exhaust
90.3 102.8 102.3 97.6 96.8 95.9 93.6 89.0 107.4
Silencer
F217 Quite Site II Second
87.8 80.5 85.7 84.7 84.8 84.4 83.7 83.1 93.8
Stage

Note:
1. Sound pressure levels per ANSI S12.34-1988 and SIO 3744 as applicable.
2. Data based on full rated load with standard radiator-fan package.
3. Sound data for generator set with infinite exhaust do not include exhaust noise.
4. Reference sound pressure is 1pW-1x10-12 W.
5. Sound pressure levels are subject to instrumentation, measurement, installation and generator set variability.
6. Sound data with remote-cooled sets are based on rated loads without fan noise.

Exhaust Sound Pressure Levels @ 1 meter dB(A)


Octave Band Center Frequency (Hz) Sound
Open Exhaust (No Muffler) @ Rated Load 63 125 250 500 1000 2000 4000 8000 Pressure Level
82.48 96.87 99.62 103.6 101.0 101.2 101.8 97.9 109

Note: Sound pressure level per ISO 6798 Annex A as applicable.

Cummins Power Generation Data and Specification Subject to Change Without Notice Bulletin msp-1045a

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