Speron 2020 - A tool for predicting the acoustic performance of road surfaces (Leisstra 3, part project 1)

Start date 01/01/2011
End date The project is closed: 31/12/2013



Tyre/road noise mainly consists of two parts, air-pumping noise and noise created by vibrations of the tyre surface. Air-pumping is a collective concept for noise created directly in the contact between tyre and road. There are a number of suggested generation mechanisms for air-pumping noise but no general theory that can explain and predict the phenomena for all combinations of tyre, road and vehicle speed. This project attacs air-pumping from a different angle - the vehicle speed dependency of different types of noise sources. We assume that air-pumping noise is generated by monopole type of sources (similar to small, pulsating spheres). Then the sound pressure level caused by air-pumping must have a vehicle speed exponent around 4. In other words, the sound pressure level will be proportional to U4, where U is the vehicle speed. The, so far, better understood generation mechanism, tyre vibrations, have a U2 dependency. By analysing the speed exponent of tyre/road noise, the proportion of the two different components can be identified. This powerful tool allows for advanced investigations of the air-pumping phenomenon with the goal to understand how it can be predicted.

 

  

Influence of air-flow related sources to the total tyre/road
noise for a slick tyre rolling on a rough road surface.

 

The project is carried out at the Division of Applied Acoustics in the research group Vibroacoustics.

More information can be found at Leisstras homepage.

Keywords: tyre/road noise, air-pumping

Project members

Projectleader  
Thomas Beckenbauer (Müller BBM GmbH)

Project members  
Julia Winroth
Wolfgang Kropp
Carsten Hoever

Contact
Dr. rer. nat Christina Bückers, leistra3@bast.de
External partners at the project
​Müller BBM GmbH (Projektleitung)
Chalmers University of Technology
Continental Reifen Deutschland GmbH
Karlsruher Institut für Technologie
Chalmers Areas of Advance
​Built Environment
Transport
​​German Federal Ministry of Economics and Technology

Published: Wed 05 Jun 2013. Modified: Mon 29 Jun 2015