PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IC-G-D-00-043e F
July 2016
SOUND PRESSURE LEVEL
IN THE GAS ENGINES EXHAUST AREA
1/3
1. INTRODUCTION
The purpose of this information is to define the noise emission levels in the
Kohler
gas engine exhausts.
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.
F/SFGLD ENGINES
180
240
360
480
560
LpA IN FREQUENCY
BANDS (Hz)
63
125
250
500
1000
2000
4000
94
106
106
112
108
109
109
96
109
113
115
111
113
112
96
109
113
115
112
113
114
94
111
112
119
116
117
116
98
109
112
117
113
113
114
LpA,
dB(A)
117
120
121
124
121
HGM ENGINES
560
LpA IN FREQUENCY
BANDS (Hz)
63
125
250
500
1000
2000
4000
99
109
115
116
114
114
116
LpA,
dB(A)
122
1.21
O&M_2.002211.810_A_10_2016
