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ICSV26
Congrès international sur le son et la vibration

ICSV26 Congrès international sur le son et la vibration

Cynthia Magnen chercheure contractuelle en linguistique et
Julien Tardieu ingénieur de recherche en psychoacoustique,
tous deux rattaché.es à la Maison des Sciences de l’Homme et de la Société de Toulouse (MSHS-T, USR3414, CNRS / Université fédérale de Toulouse-Midi-Pyrénées) participent au 26ème Congrès international sur le son et la vibration (ICSV26) à Montréal du 7 au 11 juillet 2019.

Le Congrès est organisé par :
L’Institut international d’acoustique et de vibration (IIAV)
L’Association canadienne d’acoustique (CAA)
L’Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST)


ICSV26, MONTRÉAL, QC, CANADA
L’Institut international d’acoustique et de vibration (IIAV) et l’Association canadienne d’acoustique (CAA) et l’Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST) ont le plaisir d’inviter des scientifiques et des ingénieurs du monde entier à participer au 26e Congrès international sur le son et la vibration (ICSV26) qui se tiendra à Montréal du 7 au 11 juillet 2019.

Ce congrès est un événement majeur dans le domaine de l’acoustique et des vibrations.
Il offre aux scientifiques et aux ingénieurs une occasion importante de partager leurs derniers résultats de recherche et d’échanger des idées sur les théories, les technologies et les applications dans ces domaines. Le congrès présentera un large éventail de documents techniques de haut niveau provenant du monde entier : des conférences plénières distinguées présenteront les développements récents sur des thèmes importants du son et des vibrations ...


Cynthia Magnen

Cynthia Magnen est chercheure contractuelle en linguistique à la Maison des Sciences de l’Homme et de la Société de Toulouse (MSHS-T, USR3414, CNRS / Université fédérale de Toulouse-Midi-Pyrénées).

Le poster :

MENTAL REPRESENTATIONS EVOKED BY AIRCRAFT NOISE COMPONENTS

This study aims at better understanding aircraft noise annoyance through an analysis of mental representations associated to aircraft noise.

From a theoretical point of view, we investigate top-down strategies of sound perception. In particular, we want to identify mental representations that are evoked by the sounds and that drive listeners’ sound perception.

Thanks to interviewing techniques, we helped participants to explicit what they had in mind when listening to the different sounds, and without asking them about annoyance. We focused on three main aircraft noise signal components : multiple pure tones (MPT), blade pass frequency (BPF) and broadband noise (BN). Two sets of sounds corresponding to two types of large aircraft were eared by 84 participants in an isolated sound booth.

Each sound was played once, and for each sound participants were asked to answer a series of questions aimed at collecting verbal descriptions on the played sound. Seven different questions were created to help the participants produce a detailed description of his/her perception of the sounds.

A content analysis was performed on the verbal data to explicit the relations between the different terms that are present in the verbal data in order to create semantic categories.

This method has proven to be efficient since a large and reach verbal corpus has been collected. The linguistic analysis of this corpus revealed specific mental representations of each aircraft noise component.

In particular, both MPT and BPF had negative connotations, with different levels and with specific semantic profiles in contrast with BN. Finally, this study leads to new perspectives in the analysis of aircraft noise annoyance since that annoyance is also function of mental representations that are evoked by aircraft noise, and not only by acoustic parameters.

Keywords : sound perception, mental representations, aircraft noise

- Plus d’informations sur le site du ICSV26


Julien Tardieu

Julien Tardieu est ingénieur de recherche en psychoacoustique à la Maison des Sciences de l’Homme et de la Société de Toulouse (MSHS-T, USR3414, CNRS / Université fédérale de Toulouse-Midi-Pyrénées).

La conférence :

PERCEPTUAL RELEVANCE OF ACOUSTICAL PARAMETERS IN AIRCRAFT NOISE

This paper focuses on the perception of three main signal components of aircraft sound : multiple pure tones (MPT), blade passing frequency (BPF) and broadband noise.

The interaction between these components and their relative impact on noise annoyance still needs to be investigated. The experiment carried out in this study aims at understanding if MPT is a prominent perceptual factor when combined with BPF, and how MPT perceptual prominence changes when MPT and BPF are combined at different gain levels.

To address this issue, we used a free sorting task (FST) protocol in which participants have to use their own similarity criteria in order to sort a set of sounds.

FST is a simple procedure that allows to reveal the perceptual strategies of participants when they are exposed to a set of complex sounds. Its main advantage is to let the participants free to choose his/her sorting criteria, with very few guidance from the experimenter.

From a theoretical point of view, this task is based on perceptual categorization, which is a natural cognitive process used in everyday life. Two sets of 15 sounds corresponding to two types of large aircraft were judged by 57 participants in an isolated sound booth.

These data were analyzed using multivariate component analysis (MCA) to identify perceptual factors used by most of the participants to form their categories. Results showed that MPT was always more perceptually salient than BPF, and that BPF and MPT intensity differences were not relevant for the participants.

Keywords : sound perception, free sorting task, aircraft noise

- Plus d’informations sur le site du ICSV26