Abstract
A dominating part of tyre noise is radiated from a region close to
the tyre/road contact patch, where it is very difficult to measure
both the tyre vibration and the acoustic near field. The approach
taken in the present paper is to model the tyre and road surfaces
with a Boundary Element Model (BEM), with unknown node vibration
data on the tyre surface. The BEM model is used to calculate a set
of transfer functions from the node vibrations to the sound
pressure at a set of microphone positions around the tyre. By
approximate inversion of the matrix of transfer functions, the
surface vibration data can then be estimated from a set of
measured sound pressure data. The paper describes the different
elements of this so-called Inverse Boundary Element Method (IBEM)
including the measurement system, and it gives results from a
verification measurement on a loudspeaker sound source. Results
from tyre noise measurements will be presented at the conference.
| Original language | English |
|---|---|
| Title of host publication | Proceedings from Inter-Noise 98, 16-18 November 1998 |
| Place of Publication | Christchurch, NZ |
| Publication date | 1998 |
| Publication status | Published - 1998 |
| Event | 27th International Congress and Exhibition on Noise Control Engineering - Christchurch, New Zealand Duration: 16 Nov 1998 → 18 Nov 1998 Conference number: 27 |
Conference
| Conference | 27th International Congress and Exhibition on Noise Control Engineering |
|---|---|
| Number | 27 |
| Country/Territory | New Zealand |
| City | Christchurch |
| Period | 16/11/1998 → 18/11/1998 |