NOISE MEASUREMENT

IN BRITAIN FROM APRIL 1, 1970, ALL MOTOR VEHICLES WILL HAVE TO BE CONSTRUCTED TO COMPLY WITH REGULATIONS ON LIMITS EXTERNAL NOISE. THIS ARTICLE CONSIDERS THE EXACT NATURE OF PRESCRIBED TEST PROCEDURE AND THE PERFORMANCE OF THE SPECIFIED MEASURING APPARATUS. DURING THE TEST, THE VEHICLE ACCELERATES AT FULL THROTTLE OVER A DISTANCE OF 20 METERS, FROM AN ENGINE-SPEED OF THREE-QUARTERS OF THAT FOR MAXIMUM B.H.P., OR THREE-QUARTERS OF THE GOVERNED SPEED, IN A GEAR SUCH THAT, DURING ACCELERATION, THE MAXIMUM ENGINE-SPEED CLOSELY APPROACHES, BUT DOES NOT EXCEED, THE SPEED FOR MAXIMUM B.H.P., OR THE GOVERNED SPEED. OBSERVATIONS OF VERIATIONS OF NOISE WITH TIME, DURING THE TEST, CAN BE USEFUL IN THE DIAGNOSIS OF THE PREDOMINANT SOURCE OF NOISE. /AUTHOR/

• Supplemental Notes:
  • Vol 60, No 3, PP 111-112
• Corporate Authors:

  IPC Transport Press, Limited

  Dorset House, Stamford Street
  London SE1 9LU,   England 
• Authors:
  • Mills, C H
• Publication Date: 1970-3

Media Info

• Serial:
  • Automobile Engineer
  • Publisher: IPC Transport Press, Limited

Subject/Index Terms

• TRT Terms: Measuring instruments; Motor vehicles; Sound level meters; Traffic noise
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00223257
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 17 1970 12:00AM