A REVIEW OF ENGINE NOISE CONTROL

The author outlines the background to the research into noise control conducted during the last 15 years by the Perkins Engine company. Noise reductions of between 3 and 6 dba can be obtained by use of a package that can be applied to various engines. The development of a quiet engine known as the 6 is described. The disappointing results given by this engine were thought to be due to the incorporation of empirically designed features. Research into a new method of predicting noise at the design stage was started in 1973 using the new comprehensive noise test facilities at Perkins which are described. The prediction of engine vibration is being carried out using finite element structural analysis applied to very simple elements. The author describes the construction of a special "research engine" developed to check the predictive technique. Tests on the engine show a reduction of nearly 11 dba on cylinder block noise compared with a standard engine. The research at present is aimed at establishing the structural features responsible for block noise. Future research is to include a study into the subjective content of engine noise. /TRRL/

• Corporate Authors:

  Trade and Technical Press, Limited

  Crown House
  Morden, Surrey SM4 5EW,   England 
• Authors:
  • Southall, R
• Publication Date: 1976-11-12

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 321-325
• Serial:
  • Noise Control and Vibration Insulation
  • Volume: 7
  • Issue Number: 9
  • Publisher: Trade and Technical Press, Limited

Subject/Index Terms

• TRT Terms: Design; Engines; Finite element method; Forecasting; Laboratories; Mathematical models; Measurement; Motors; Noise; Noise control; Prototypes; Sound; Sound level; Structural analysis; Test procedures; Vibration
• Uncontrolled Terms: Decreases; Models
• Old TRIS Terms: Engine noise
• ITRD Terms: 9009: Decrease; 9011: Design (overall design); 6490: Finite element method; 132: Forecast; 6237: Laboratory (not an organization); 6136: Measurement; 6205: Model (not math); 1334: Motor; 9109: Prototype; 6748: Sound; 6747: Sound level; 6288: Test method; 5558: Vibration
• Subject Areas: Bridges and other structures; Design; Environment; Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00152577
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jun 17 1977 12:00AM