also deined as an unwanted nce noise can aect human in number o ways like their hearing, ability to communicate and their behavior. umber o ways in which the inal sound radiation may beinluenced5 reduction at the source o combustion orcesand mechanical orces, reduction o the vibrationtransmission between the sources and the outer surace, reduction o the sound radiation o the outer surace, reduction o combustion pressures. henoise o vehicles and machines is mainly deined by thenoise generated by their power plant which is usually anengine. he separationo engine combustion and mechanical noise indicated that their contribution was almost e'ual.
(PDF) An overview of automobile noise and vibration control
P11221 - Noise Reduction for Internal Combustion Engines - Edge Rit
An Overview of Automobile Noise and Vibration Control
Noise reducing Methods for
Engine: A Review Noise Sound
Aswith any occupational hazard, control technology should aim atreducing noise to acceptable levels by action on the work environment. )or noise reduction muler, silencer, vibration control, barriers andenclosures can be used and should be considered at the designstage. his paper presents the dierent methods o noisereduction. he transmission path properties are determined by the vibration modes o the structure. N additionthere are many e'uipment installation where the cost todevelop noise reduction measures or old e'uipment is prohibitive. ne o the predominating contributors to the totalengine noise is the noise emitted by the engine though strides o progress have been made in sourcenoise reduction, some type o industrial and manuacturinge'uipment such as hammer mills, power presses, plasticgrinders, diesel engines etc. Or will reducethe noise transmission through the air or through the structure o the workplace. 2, assistant Professor,.I.S.S.M.S.C.O.E., Mechanical Engg. he main noise sources wereconsidered to be mechanical in nature. he muler accomplishes with a resonating chamber, which isspeciically tuned to cause destructive intererence, whereopposite sound waves cancel each other.