Raphael Leiba

Gustave Eiffel University · UMR en Acoustique Environnementale (UMRAE)

Le bruit, en particulier celui dû au trafic routier, est cité par de nombreuses études comme une source de préoccupation sociétale majeure. Jusqu'à présent les réponses des pouvoirs publics ne se basent que sur une quantification énergétique de l'exposition sonore, souvent via la mesure ou l'estimation du LA ou du Lden, et des prises de décisions r...

This study deals with noise annoyance in urban environments. It is based on a previous work that resulted in two main outputs. First, a measurement tool that identifies and extracts sonic properties of the main urban noises sources, i.e. the different types of vehicles. Second, a modeling tool that estimates the perceived annoyance level by adaptin...

This work is part of a study dealing with city-dwellers' quality of life. Noise is known to be an important factor influencing the quality of life. In order to diagnose it properly, we propose a noise monitoring system of urban areas. It is based on the use of large microphone arrays in order to extract the radiated sound field from each passing-by...

Unlocking the industrial potential of acoustic metamaterials requires a design process which accounts for the realities of the required additive manufacture. At present, the impact of additive manufacturing tolerances and surface topologies on the acoustic behaviour of designs is not well understood. This research investigates the effects of the su...

The focus of this paper is on utilizing a copula-based technique for separating music signals. In this method, copulas are utilized to model the dependency structure of the source components. The objective is to minimize the Kullback-Leibler divergence between the copula density of the estimated source components and the copula density of the sourc...

This paper focuses on the localisation and characterisation of noise sources generated by aircraft flyovers near airports. Classical delay-and-sum beamforming algorithm has first been used to realise acoustic maps of sound sources, but the image resolution and the dynamic range of this technique are limited. To overcome these physical limitations,...

Commonly used conventional acoustic porous materials suffer from a limited operational frequency range and great dependency of the sample thickness on their performance. For this reason, acoustic metamaterials have caught the eye of the scientific community with their ability to manipulate and absorb soundwaves despite their subwavelength dimension...

The sound absorptive performance of a proposed “meta-liner” are investigated in this paper. The structure is composed of closely placed plates connected by openings at alternating locationsin a stacked format. This system presents multiple band gaps with high absorption and sub-wavelength behaviour (sample thickness equals 0.04 λ), achieved through...

This study deals with community noise quality assessment (annoyance) of urban environments. It is based on a previous work that resulted in: a) a road-traffic vehicle audio signals extraction tool, allowing to estimate different sonic properties; b) a modeling tool that estimates the perceived annoyance level by adapting a current multiclass psycho...

Le bruit, en particulier celui dû au trafic routier, est une préoccupation sociétale majeure. Il influe sur notre qualité de vie mais aussi sur notre santé. Pour quantifier l’exposition au bruit, les approches réglementaires se focalisent sur l’utilisation d’indices énergétiques, principalement le Lden et le LA;eq. Or ces indices ne rendent compte...

Characterising the urban sonic environment is usually done by measuring the energetic indicators such as the average A-weighted level. The European 2002/49/EC directive compels large cities to establish noise maps and pursue action plans aimed at reducing the percentage of citizens exposed to excessive noise levels. In parallel the soundscape conce...

Pour la caractérisation de l’environnement sonore urbain une approche possible consiste à évaluer des indicateurs énergétiques comme le niveau acoustique moyen ou d'autres plus sophistiqués tels l’indice Lden construit par pondération des périodes de la journée : jour(d)/soirée(e)/nuit(n). Le Lden est notamment utilisé pour constituer les cartes de...

Cartes stratégiques de bruit ou écoquartiers, la prise en compte de la gêne sonore en milieu urbain dans les politiques de la ville est réelle. Mais beaucoup de chemin reste à faire pour réaliser de réelles cartes de la gêne sonore.

Noise in urban context is one of the main concern in terms of societal impact. In fact, sound environment is adressing issues at various levels: transmission of information, social relations, perception of comfort, and in the worst cases, health effects on city-dwellers. The paper will present the first steps of an academic research concerning meas...