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TAURA: Traffic Noise Auralisator

Applicant Heutschi Kurt
Number 149618
Funding scheme Project funding (Div. I-III)
Research institution Eidg. Materialprüfungs- und Forschungsanstalt (EMPA)
Institution of higher education Swiss Federal Laboratories for Materials Science and Technology - EMPA
Main discipline Other disciplines of Engineering Sciences
Start/End 01.07.2014 - 30.06.2016
Approved amount 198'092.00
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Keywords (8)

auralisation; acoustics; noise control; noise; environmental noise auralisation; virtual acoustical environment; road traffic noise synthesizer; railway noise synthesizer

Lay Summary (German)

Lead
Zur Untersuchung der als besonders störend empfundenen Signalaspekte von Bahn- und Strassenlärm können Hörversuche mit Probanden im Labor durchgeführt werden. Voraussetzung dazu ist die Verfügbarkeit von geeigneten akustischen Signalen, die sich hinsichtlich spezifischer Merkmale unterscheiden. Im Rahmen dieses Forschungsprojekts soll als zentrales Werkzeug solcher Tests ein Verkehrslärmsynthesizer entwickelt werden, der frei wählbare Strassen- und Eisenbahnlärmszenarien erzeugen kann.
Lay summary

Inhalt und Ziel des Forschungsprojekts

Die Hörbarmachung bzw. Auralisation einer Verkehrslärmszenerie erfordert einen Emissionssynthesizer, der die von den einzelnen Quellen abgestrahlten Audiosignale generiert und ein Ausbreitungsfilter, das die Schallausbreitungseffekte von der Quelle zum Zuhörer nachbildet. Der Fokus in diesem Projekt ist auf die Erzeugung der Quellensignale gerichtet. Der Schlüssel zu einer plausiblen Quellensignalsynthese liegt in der Simulation eines grossen Fahrzeugparks mit individuellen, fahrzeugspezifischen Geräuschmerkmalen. Zusätzlich soll der Einfluss der wichtigsten emissionsbestimmenden Aspekte modellierbar sein.

 

Wissenschaftlicher und gesellschaftlicher Kontext des Forschungsprojekts

Mit der Entwicklung eines Auralisators für Verkehrslärm entsteht eine Plattform, die eine einfache Durchführung von spezifischen Hörversuchen erlaubt. Es darf erwartet werden, dass das Werkzeug einen Beitrag zur Identifikation von neuen, künftig in einer Lärm-Beurteilung zu berücksichtigenden, Signalmerkmalen leisten wird. Überdies kann sich die Auralisationstechnik in der Kommunikation mit Laien zu einem nützliches Hilfsmittel entwickeln, indem nicht mehr nur auf abstrakte Aussagen in Dezibel abgestellt werden muss, sondern die akustischen Verhältnisse direkt erlebbar gemacht werden können.

Direct link to Lay Summary Last update: 04.10.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Auralization of railway noise: Emission synthesis of rolling and impact noise
Pieren Reto, Heutschi Kurt, Wunderli Jean Marc, Snellen Mirjam, Simons Dick G. (2017), Auralization of railway noise: Emission synthesis of rolling and impact noise, in Applied Acoustics, 127, 34-45.
Auralization of Accelerating Passenger Cars Using Spectral Modeling Synthesis
Pieren Reto, Bütler Thomas, Heutschi Kurt (2016), Auralization of Accelerating Passenger Cars Using Spectral Modeling Synthesis, in Applied Sciences, 6(5), 1-27.
Auralisation of accelerating passenger cars
Pieren Reto, BütlerThomas, Heutschi Kurt (2015), Auralisation of accelerating passenger cars, in EURONOISE 2015, Maastricht, HollandEAA; ABAV; NAG, Maastricht, Holland.
Auralisation of Railway Noise: A Concept for the Emission Synthesis of Rolling and Impact Noise
Pieren Reto, Wunderli Jean Marc, Zemp Armin, Sohr Sebastian, Heutschi Kurt, Auralisation of Railway Noise: A Concept for the Emission Synthesis of Rolling and Impact Noise, in Inter-Noise 2016, HamburgDeutsche Gesellschaft für Akustik, DEGA, Berlin.

Collaboration

Group / person Country
Types of collaboration
SONORUS consortium, EU Marie Curie Sweden (Europe)
- in-depth/constructive exchanges on approaches, methods or results

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Workshop on aircraft noise and auralisation Individual talk Auralisation in environmental acoustics 18.04.2016 TU Delft, Netherlands Pieren Reto;
Conference Euronoise 2015 Talk given at a conference Auralisation of accelerating passenger cars 31.05.2015 Maastricht, Netherlands Pieren Reto;


Self-organised

Title Date Place
Workshop on listening tests and auralisations 29.03.2016 Empa Dübendorf, Switzerland

Communication with the public

Communication Title Media Place Year
New media (web, blogs, podcasts, news feeds etc.) Künftigen Lärm simulieren, um ihn zu vermindern Medienmitteilung International 2016

Associated projects

Number Title Start Funding scheme
135555 VisAsim - Visual-Acoustic Simulation for landscape impact assessment of wind farms 01.07.2011 Interdisciplinary projects
178991 Urban Mining for Low Noise Urban Roads and Optimized Design of Street Canyons 01.01.2019 Project funding (Div. I-III)

Abstract

Noise caused by traffic is a relevant health factor in urban environments, along major transport routes and in the vicinity of airports. Noise - in contrast to sound - can principally not be measured but has to be assessed. For the most relevant noise sources, objective quantities have been derived that correlate with the annoyance as reported by people. However these correlations are usually weak. One reason for this is the fact that the describing quantities used so far represent the acoustic situation only in a very simplified manner. A method to further investigate the signal properties relevant to noise is to conduct listening experiments where differ-ent stimuli are presented to test persons. Relying on audio recordings allows for little variation of different signal aspects only. A more versatile method with a much higher degree of freedom as well as full control of the influencing signal parameters is to synthesize the stimuli and thus to auralise an acoustical environment. While in use for quite some time in room acoustics, the application to environmental noise has been discov-ered only recently. In this research project a traffic noise auralisator shall be developed that covers road traf-fic and railway noise. It will form the basis for future experiments to refine the characterization of noise. The key element is a synthesizer that simulates the acoustical emission of a great many of different vehicles, op-erating on wide variety of surfaces and under different operating conditions. To obtain the corresponding steering parameters, a hierarchic synthesizer structure with core parameters and global parameters is pro-posed. While the core parameters will be determined with controlled experiments for a small number of ve-hicles, the global parameters are measured for a large vehicle fleet. Hereby a measurement strategy with suppression of the effect of neighbor vehicles is developed. The method will then be applied to freely flowing traffic. The emission synthesizer will be complemented by a time variable filter to simulate the sound propa-gation effects from the moving sources to a receiver position. This propagation filter is already available from the simulation of wind turbine noise. The completed auralisation tool will finally be tested in comparison with real recordings. This validation step will help to assess the quality of the auralisation and yield an answer to the central research question, whether a traffic noise soundscape can be generated synthetically with sufficient accuracy. Hereby the listening impression reported by test persons should not differ significantly between real-world recordings and the synthesized sounds.
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