POWER TOPIC - WHY SILENT GENERATORS?
NOISE SOURCES (ESTIMATED SOUND POWER LEVELS)
Engine noise – This is mainly caused by mechanical and combustion forces and typically ranges from 100 dB (A) to 121 dB (A), measured at one meter, depending on the size of the engine.
Cooling fan noise – This results from the sound of air being moved at high speed across the engine and through the radiator. Its level ranges from 100 dB (A) to 105 (A) dB at one meter.
Alternator noise – This is caused by cooling air and brush friction and ranges from approximately 80 dB (A) to 90 dB (A) at one meter.
Induction noise – This is caused by fluctuations in current in the alternator windings that give rise to mechanical noise that ranges from 80 dB (A) to 90 dB (A) at one meter.
Engine exhaust – Without an exhaust silencer, this ranges from 120 dB (A) to 130 dB (A) or more and is usually reduced by a minimum of 15 dB (A) with a standard silencer.
Structural/mechanical noise – This is caused by mechanical vibration of various structural parts and components that is radiated as sound.
TYPICAL NOISE LEVELS