PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IC-G-D-00-042e E
March 2015
SOUND PRESSURE LEVEL IN GAS ENGINES
1/3
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
180 240 360 480 560
LpA IN FREQUENCY
BANDS (
H
z)
125
250
500
1000
2000
4000
--
70
82
84
81
76
59
73
79
85
83
77
--
69
76
82
83
79
66
70
76
81
80
73
71
79
81
83
84
79
LpA,
dB(A)
88 88 87 85 89
HGM ENGINES
560
LpA IN FREQUENCY
BANDS (
H
z)
125
250
500
1000
2000
4000
71
77
79
81
88
83
LpA,
dB(A)
90
1.17
O&M_2.002211.810_A_10_2016
