Conveners
A21.03 Tyre/road noise: S153
- Manfred Haider (AIT Austrian Institute of Technology GmbH)
A21.03 Tyre/road noise: P436
- Manfred Haider (AIT Austrian Institute of Technology GmbH)
A21.03 Tyre/road noise: S405
- Manfred Haider (AIT Austrian Institute of Technology GmbH)
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Reto Pieren (Empa)11/09/2026, 08:40A21 Transportation Noise and Vibration
The close-proximity (CPX) method according to ISO 11819-2 is increasingly applied to monitor and character-ize road surfaces. To better understand the physical mechanisms underlying CPX measurements and to enable predictions of CPX spectra, a hybrid simulation model called CPX simulator is developed. This contribution presents experimental and numerical investigations conducted during model...
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Beate Altreuther (Müller-BBM Industry Solutions GmbH)11/09/2026, 09:00A21 Transportation Noise and Vibration
The CPX method is a standard method for assessing the acoustic properties of road surfaces. The reference tyres to be used with this method are specified in ISO/TS 11819-3. The H1 tyre (AVON AV4) mentioned therein, which is used to characterize the tyre/road noise of trucks, has been discontinued since the end of 2014. This makes it necessary to find a suitable replacement for AVON AV4.With...
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Petra Markova (Transport Research Centre)11/09/2026, 09:00A21 Transportation Noise and Vibration
Road traffic noise is significantly influenced by road surface properties, in particular by the surface type and its condition. The noise generated at the tyre–road interface is commonly assessed using the Close Proximity (CPX) method according to ISO 11819-2, which enables direct source related measurements.This contribution addresses long term monitoring of the noise emission of different...
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Anneleen Bergiers (Belgian Road Research Centre)11/09/2026, 09:20A21 Transportation Noise and Vibration
Within the framework of working group ISO/TC43/SC1/WG33, which is dealing with measuring methods for comparing traffic noise on different road surfaces, the revision of ISO/TS 11819-3 is ongoing since 2025. This technical specification concerns reference tyres used in CPX (Close-Proximity) noise measurements. One of the remarks received during the systematic review of this technical...
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Blanka Hablovicova (Transport Research Centre)11/09/2026, 09:40A21 Transportation Noise and Vibration
The CPX method uses two mandatory microphones and up to four additional (optional) microphones to assess road surface noise. The microphones are positioned around a reference tyre and record noise generated at the tyre–road contact. However, the overall noise levels may vary depending on the number and placement of the microphones. This raises the question of whether the currently mandatory...
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Maria Ramos (BRISA)11/09/2026, 10:20A21 Transportation Noise and Vibration
BRISA, Portugal’s leading highway concessionaire, is committed to place sustainability at the core of its road infrastructure management, with a particular focus on mitigating traffic noise through efficient pavement management. In this context, BRISA has been investigating the acoustic impact of replacing end-of-life pavements, analysing both the immediate noise reduction and the long-term...
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Jiawen Meng (Karlsruhe Institute of Technology)11/09/2026, 10:40A21 Transportation Noise and Vibration
With the increasing adoption of electric vehicles, tyre--road noise is becoming the dominant source of vehicle exterior noise at low and medium speeds. This study analyses on-board sound intensity (OBSI) data collected under constant-speed and acceleration conditions for five production tyres on three electric vehicles, measured on an ISO~10844:1994 reference surface.The baseline speed...
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Jinhong Li (Université Gustave Eiffel - UMRAE)11/09/2026, 11:00A21 Transportation Noise and Vibration
The understanding of tyre/road interactions is of great interest in traffic noise reduction and tyre design. This paper deals with the forced response of a slick rolling tyre in contact with a rough road surface. The calculations are performed in quasi-statics in a fixed contact zone using a Eulerian coordinate system, assuming no coupling between structural vibrations and the contact...
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Kazuma Saito (University of Southampton)11/09/2026, 11:20A21 Transportation Noise and Vibration
Road traffic noise is a major environmental concern in urban areas due to its adverse health effects. At a steady driving speed of 35-120 km/h, tyre noise is known to be the dominant noise source of car noise. The tyre has a multi-layer structure of rubber, steel and textile components. Therefore, a full 3D model is computationally expensive and prevents repeated simulations. In contrast,...
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Robin Mafféïs (Université Gustave Eiffel)11/09/2026, 11:40A21 Transportation Noise and Vibration
This study proposes the use of an acoustic metamaterial in the wheel arch to reduce the noise generated by tire-road contact. The method employed is based primarily on the use of a simplified numerical model of a wheel arch that combines finite elements with boundary elements to evaluate the impact of an acoustic absorption treatment in this area. Based on this assessment, an acoustic...
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