Acoustic Definitions - Kohler SFGLD480 Operation & Maintenance Manual

1. INTRODUCTION
The purpose of this information is to define the noise emission levels in Kohler gas engines.

2. ACOUSTIC DEFINITIONS

Decibel
Logarithmic unit that relates an energy magnitude with another, similar, magnitude accepted as a reference.
Sound power
Energy that a sound source emits to the surrounding medium by time unit.
Sound pressure
Atmospheric pressure variations at one point, produced by the propagation of a sound wave.
3. NOISE EMISSION AT 1200 RPM
The following table shows the sound pressure distribution in octave frequency bands and the total sound level
with the engine running continuously at 1200 rpm and at 100% power.
ENGINES F/SFGLD
125
250
500
1000
2000
4000
LpA,  dB(A)
HGM ENGINES
125
250
500
1000
2000
4000
LpA,  dB(A)
PRODUCT INFORMATION
IC-G-D-00-042e
SOUND PRESSURE LEVEL IN GAS ENGINES
180 240
-- 59
70 73
82 79
84 85
81 83
76 77
88 88
560
71
77
79
81
88
83
90
1.17
INDEX DATE
E
March 2015
O&M_2.002211.810_A_10_2016
360 480
-- 66
69 70
76 76
82 81
83 80
79 73
87 85
Dep. 2
560
71
79
81
83
84
79
89
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