Victor ROSI' Thesis Defence

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Victor ROSI will defend his thesis: "THE METAPHORS OF SOUND: FROM SEMANTICS TO ACOUSTICS -  A STUDY OF BRIGHTNESS, WARMTH, ROUNDNESS, AND ROUGHNESS"
done in the PDS team, at IRCAM (STMS: Ircam, Sorbonne Université, CNRS, ministère de la Culture), on the 8th of July at 2PM.

This thesis is in the Stravinsky room at IRCAM, but you can follow it throught our IRCAM' s YouTube channel:  https://youtu.be/jEpCnmMQqck

JURY:

Supervisor
Patrick SUSINI – Ircam STMS  (IRCAM-Sorbonne Université-CNRS-ministère de la Culture), Paris

Co-supervisors
Olivier HOUIX – Ircam STMS  (IRCAM-Sorbonne Université-CNRS-ministère de la Culture), Paris
Nicolas MISDARIIS –  Ircam STMS  (IRCAM-Sorbonne Université-CNRS-ministère de la Culture), Paris

Reviewers
Charalampos SAITIS – C4DM, Queen Mary University, London
Sølvi YSTAD – PRISM Lab, CNRS-Aix-Marseille University, Marseille

Examiners
Ophelia DEROY – CVBE, Ludwig Maximilian University, Munich
Bruno L. GIORDANO – La Timone Neuroscience Institute, CNRS, Marseille

Guest member
Mikhail MALT – Ircam STMS  (IRCAM-Sorbonne Université-CNRS-ministère de la Culture), Paris

Abstract:

The mysteries of the auditory world prompt us all to describe, as best as we can, what we hear. In some professional environments, the ability to verbally convey one’s perception of sound qualities is crucial, whether you are a sound engineer, a musician, a sound designer, or a composer. Sometimes, talking about a sensation of any kind leads us to use metaphorical vocabulary. Thus, communication in the world of sound and music often depends on terms extracted from other sensory modalities like vision or touch. This is the case of four well-known attributes at the heart of this study, brightness, warmth, roundness, and roughness. But do we all have the same auditory sensation associated with such "extrasonic" concepts? To what extent are we able to faithfully describe a sensation expressed by these metaphors?

Brightness, warmth, roundness, roughness. The meaning of these terms used as sound attributes has been studied within the general framework of the semantic dimensions of sounds. However, the specific origins of such metaphorical terms and their mutual connections remain to be discovered. The aim of this study is to explore and expose the connection between these attributes and their projection in the sound domain. In other words, we aim to align their semantic definitions with mental representations expressed by their acoustic portraits. For each of the four attributes, we have reported on different layers of semantic descriptions that can be acoustic, metaphorical, or source-related. Through interviews and an online survey, we were able to develop definitions for each of the attributes based on the most relevant information from a population of sound professionals. However, the four terms depended on a lot of metaphorical elements that were still difficult to elucidate. To disambiguate these metaphorical descriptions, we asked three different expert populations (sound engineers, conductors and non-experts) to evaluate brightness, warmth, roundness and roughness in a corpus of orchestral sounds. We chose to use the new method of Best-Worst Scaling to fulfill that goal. This method allowed us to show that while some concepts transcend sound expertise, others can be specific to it. Gathering the data from the sound professionals brought forth a musical composition called Quadrangulation – by Bertrand Plé – whose objective was to illustrate and transmit the meaning of the four concepts.

Through this interdisciplinary approach, we shed light on connections between our ability to understand a sound attribute’s meaning and the mental representation associated with them. In addition, we uncovered potential incongruities between the perceptual projection of a metaphorical sound concept and the clarity of its definition. Finally, based on our results, we proposed a semantic explanation of the relations between the four concepts, thus inviting a better understanding of their use in professional conversations. 

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