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Measuring, Understanding and Reducing Tyre Noise Emission under Realistic Vehicle Operation Conditions, including the Contribution of the Road Surface

Objective



Objectives and content

The growing traffic density, particularly in suburban and city centres, leads to the inhabitants being increasingly subjected to and disturbed by traffic noise.

The proposed activities aim to provide a contribution in solving the environmental problem of the urban and suburban traffic noise pollution, with an optimisation of the tyres and road surfaces.

The main problem is to obtain an effective global traffic noise reduction. The current method for evaluation of noise levels is IS0 362 on IS0 asphalt 10844. However it can be observed that no European road asphalt is really equivalent to IS0 10844 (ref. Sandberg - "Tire road noise - A subject of international concern"). Also, human noise level perception can be quite different when compared to the measurements and results ,, obtained using microphones, as used in all the noise approval methods. Clearly the human ear is not a microphone and therefore its response curve is not linear in the frequency domain, and is selective in noise identification. Furthermore, test procedures are limited because the human ear is not always 7.5m from the noise source and contributions of single noise sources (engine, exhaust system, tyres, etc.) are directional. From these limitations, the research will address the problem of (running vehicles) real noise reduction in general European real road conditions.

The focus of the research is:

- How to measure and evaluate the tyre conditions to noise pollution in actual European road conditions. From these measurements a ranking of noise, can be made, so that improved products or surfaces can be identified.
- How to optimize both the tyre product and the road surface. (This will include modelling and simulation techniques).

This will result in new products and surfaces capable of reducing noise pollution. It will be reasonable to obtain 1 - 2 dB(A) tyre noise reduction on the same surface; 3 - 5 dB(A) noise reduction due to road surface. Such result will dramatically drop the emitted energy due to the intensity of tyre/road noise pollution (by up to 50%).

The results of the research will be prototypes of new tyres (including "all season" and "winter"), new road surfaces, new measurement and evaluation techniques for road noise pollution, guidelines on how to plan future "low noise" European road surfaces, traffic condition.

The summary of the project is to improve the environment by reducing the traffic noise pollution. This is turn will improve driving safety as drivers will be subjected to reduced vehicle internal noise fatigue.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Pirelli Coordinamento Pneumatici SpA
Address
Viale Sarca 222
20126 Milano
Italy

Participants (8)

GIE PSA Peugeot Citroën
France
Address
18,Rue Des Fauvelles 18
92252 La Garenne-colombes
Helsinki University of Technology
Finland
Address
5 A,puumiehenkuju 5 A
2150 Espoo
Leuven Measurements and Systems (International) Numeral Technologies NV
Belgium
Address
68,Interleuvenlaan 68
3001 Heverlee
MIRA LIMITED
United Kingdom
Address
Watling Street
CV10 0TU Nuneaton
NOKIAN TYRES PLC.
Finland
Address
Pirkkalaistie 7
37101 Nokia
Numerical Integration Technologies NV
Belgium
Address
11 A,ambachtenlaan
3001 Heverlee
Technische Hochschule Darmstadt
Germany
Address
30,Petersenstrasse 30
64287 Darmstadt
UNIVERSITY OF ROME "LA SAPIENZA"
Italy
Address
Via Eudossiana 18
00184 Roma