EXTERNAL NOISE OF MOTOR VEHICLES. DUSSELDORF CONFERENCE 1975. PART C: SHORT DISTANCE NOISE MEASURING METHOD

AUSSENGERAEUSCHE VON KRAFTFAHRZEUGEN. KOLLOQUIUM DUESSELDORF 1975. TEIL C: NAHFELD-GERAEUSCHMESSMETHODE.

IN PART C OF THE REPORT POSSIBILITIES AND LIMITS FOR NOISE CONTROL OF MOTOR VEHICLES BY SHORT DISTANCE MEASUREMENTS, AND CRITERIA FOR A SIMPLIFIED NOISE MEASURING METHOD FOR THE PURPOSE OF TRAFFIC SURVEILLANCE AND PROPOSITIONS FOR A MODIFIED TYPE TEST ARE DISCUSSED. THE SHORT DISTANCE METHOD DESCRIBED IS SUITABLE FOR EXAMINING OLDER VEHICLES FOUND IN TRAFFIC, AND IT ALLOWS ONE TO FIND REAL NOISE OFFENDERS. THE MEASUREMENTS CAN BE CARRIED OUT ALMOST ANYWHERE, AS THERE IS NO NEED FOR SPECIAL REQUIREMENTS AT THE MEASURING POINT. IT IS POINTED OUT THAT FURTHER IMPROVEMENTS IN EFFECTIVENESS ARE TO BE EXPECTED, IF RELEVANT NOISE VALUES ARE ESTABLISHED ALREADY AT THE OFFICIAL TEST AND THEY ARE ENTERED ON THE VEHICLE DOCUMENTS, SO THAT AN IMMEDIATE COMPARISON IS POSSIBLE. IT IS SHOWN THAT THERE IS A SUITABLE METHOD FOR MEASURING IN TRAFFIC IN THE VICINITY OF THE EXIT OF THE EXHAUST PIPE. LIMITS FOR SHORT DISTANCE MEASUREMENTS SHOULD NOT BE FIXED, AS THE FIXING OF THE RELATIVE STATE OF TECHNOLOGY IS CONSIDERED TO BE A MORE FLEXIBLE AND BETTER SOLUTION, BEARING IN MIND A MEASUREMENT TOLERANCE OF 5 DB(A). A CORRELATION BETWEEN MEASUREMENT VALUE AND DRIVING NOISE ACCORDING TO EG OR ISO CANNOT BE ESTABLISHED BECAUSE OF VARIABLE OPERATING CONDITIONS AND SHOULD NOT BE SOUGHT. SURVEILLANCE OF EXHAUST NOISE SHOULD BE SUFFICIENT FOR THE NEXT FEW YEARS, AND HANDLED WISELY IT SHOULD BRING SIGNIFICANT BENEFITS. IT IS RECOMMENDED THAT NOISE CONTROL MEASURING METHODS BE INTRODUCED BY LEGISLATION AS SOON AS POSSIBLE. SEE ALSO IRRD ABSTRACTS NOS 306719 AND 306720.

Language

  • German

Media Info

  • Pagination: 61-76
  • Serial:
    • VDI-Berichte
    • Issue Number: 234
    • Publisher: VDI Verlag GmbH
    • ISSN: 0083-5560

Subject/Index Terms

Filing Info

  • Accession Number: 01300402
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • ISBN: 3180902345
  • Files: ITRD
  • Created Date: Nov 21 2010 7:49AM