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Portail > Offres > Offre UMR7031-SANGUE-025 - Chercheur (H/F) sur la caractérisation du rayonnement de la voix humaine

Scientist (H/F) on Evaluation of the acoustical radiation oh the human voice

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : lundi 30 mai 2022

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General information

Reference : UMR7031-SANGUE-025
Workplace : MARSEILLE 13
Date of publication : Monday, May 9, 2022
Type of Contract : FTC Scientist
Contract Period : 20 months
Expected date of employment : 1 July 2022
Proportion of work : Full time
Remuneration : Between 2743,70 and 3896,74 € gross per month depending on experience
Desired level of education : PhD
Experience required : 1 to 4 years

Missions

The position is part of the 3-year collaborative research project RAYOVOX focusing of the characterization of the acoustical radiation of the human voice from the vocal tract to the far field. The project is funded by the French National Research Agency.
This collaborative project gathers the Laboratory of Mechanics and Acoustics (joint research unit of Aix-Marseille University, CNRS and Centrale Marseille) and the Institute ∂'Alembert (joint research unit of Sorbonne University and CNRS). It aims at developing a multimodal instrumentation enabling the simultaneous evaluation of several characteristics of the human voice: far-field directivity, near-field patterns, radiation impedance as seen by the vocal tract. An ambitious goal is to perform this evaluation on single realizations, i.e., without repeatability requirements and stationarity hypothesis.
The selected candidate will participate in several aspects of the RAYOVOX project. He/she will in particular be involved in the development and exploitation of the far-field and the near-field antennas and in the application of the instrumentation on singers.

Activities

- He/she will first participe to the design of the two microphone arrays and in the development of the numerical post-processing tools enabling the computation of the various quantities of interest.
- Concerning the far-field antenna, the aim is to implement experimental protocol designed at Institute ∂'Alembert to calibrate the sensors (positioning and frequency response), to optimize their location and to develop the tools for the sparse representation of the acoustic fields as spherical harmonics. The developments are to be validated using a calibrated sound source with controllable directivity available at LMA.
- Concerning the near-field antenna, the methodology will rely on the evaluation of the impedance matrix and of the radiation modes that are to be computed using BEM (or equivalent) on morphologically realistic surface meshes. These data will then be informed with pressure measurements in the vicinity of the speaker face in order to estimate the distribution of acoustical velocity at lip level and of pressure both in near- and far-fields.
- A last part of the proposed activities will focus on the integration of the two aforementioned antennas with the instrumentation designed during the PhD of Timothée Maison for the in vivo characterization of the vocal tract resonances. First applications of the instrumentation will consider and evaluate the redundancy between the devices, then to assess its ability to highlight intra- and inter-individual differences.

Skills

- Very strong motivation for experimental work
- Previous experience in voice, musical, or room acoustics
- Strong knowledge in signal processing

Work Context

This offer is part of a 3-year collaborative project
The selected applicant will spend most of its time at LMA, in the Technopôle Chateau-Gombert (Marseille 13e), hosting about 110 people working on several areas of mechanics and acoustics : structural dynamics, composites and heterogeneous materials, interfaces and adhesion, waves propagation in structured, porous or random media, ultrasound, field control, musical acoustics, perception. In collaboration with Fabrice Silva, Marc Pachebat, Cédric Pinhède and Patrick Sanchez (team Sounds), he/she will benefit from the facilities offered by platforms MAS (Music Audio Sound) et PSIVA (Platform Science Innovation Vibro-Acoustics, including the anechoic and semi-anechoic rooms).
Strong interaction with Institute ∂'Alembert are planned, with scheduled visits at campus Jussieu (Paris 5e) and at the campus Saint-Cyr l'École hosting the experimental facilities. He/she will collaborate with François Ollivier, Hélène Moingeon, Christian Ollivon et Matthieu Hartenstein (PhD candidate) from the MPIA team.

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