Publications de Xavier Falourd

No need to shout: Effect of signal loudness on sibling communication in barn owls

Xavier Falourd, Hervé Lissek, Patrick Marmaroli, Dorian Cazau

In animal communication, signal loudness is often ignored and seldom measured. We used a playback experiment to examine the role of vocal loudness (i.e., sound pressure level) in sibling to sibling communication of nestling barn owls Tyto alba. In this spe ...

2017

A sound diffusion system for directional sound enhancement

Xavier Falourd, Hervé Lissek, Alexandre Delidais, Alain Dufaux, Baptiste Crettaz, Patrick Marmaroli, Cédric Monchâtre

A loudspeaker array is described including several circular sound emitters that are bunked. One circular sound emitter can be either a circular array of loudspeakers (kind 1) or a toroidal loudspeaker (kind 2). The loudspeaker array can be composed of circ ...

André Roland S.A.2015

Pass-by noise acoustic sensing for estimating speed and wheelbase length of two-axle vehicles

Xavier Falourd, Hervé Lissek, Jean-Marc Odobez, Patrick Marmaroli

This paper focuses on acoustic road traffic monitoring and looks, more specifically, into the problem of speed and wheelbase length estimation of two-axle vehicles as they pass by. It is known that both front and rear axle trajectories may be dissociated u ...

2013

Observation of Vehicle Axles Through Pass-by Noise: A Strategy of Microphone Array Design

Xavier Falourd, Hervé Lissek, Jean-Marc Odobez, Patrick Marmaroli

This paper focuses on road traffic monitoring using sounds and proposes, more specifically, a microphone array design methodology for observing vehicle trajectory from acoustic-based correlation functions. In a former work, authors have shown that combinin ...

IEEE Institute of Electrical and Electronics Engineers2013

Melanic color-dependent antipredator behavior strategies in barn owl nestlings

Xavier Falourd

The arms race between predators and prey has led to morphological and behavioral adaptations. Different antipredator strategies can coexist within a population if each strategy is the result of a trade-off with competing demands. Antipredator behavior can ...

Oxford University Press2012

A Bimodal Sound Source Model for Vehicle Tracking in Traffic Monitoring

Xavier Falourd, Hervé Lissek, Jean-Marc Odobez, Patrick Marmaroli

The paper addresses road traffic monitoring using a compact microphone array. More precisely, estimation of both speed and wheelbase distance of detected vehicles is performed. The detection algorithm is based on the comparison between theoretical and meas ...

2011

Device and method for capturing and processing voice

Xavier Falourd, Philippe Martin, Hervé Lissek, Patrick Marmaroli

A portable voice capture device comprising: an orientable arm with a first differential array of microphones comprising at least one pair of microphones, the directivity of said first array being arranged for sensing voice from a first direction depending ...

2011

Etude d'une antenne octaédrique pour la localisation de sources sonores compétitives

Xavier Falourd, Hervé Lissek, Patrick Marmaroli

L'environnement industriel ou urbain peut être composé de nombreuses sources nuisibles compétitives. Les stratégies optimales pour réduire le bruit nécessitent en amont une connaissance la plus précise possible des caractéristiques acoustiques et physiques ...

2010

Localisation des premières réflexions dans une salle par chrono-goniométrie acoustique

Xavier Falourd, Hervé Lissek, Romain Boulandet

De plus en plus souvent, les espaces d'écoute sont amenés à accueillir des spectacles autres que ceux pour lesquels ils ont été conçus et dimensionnés. C'est le cas d'un auditorium classique devenant le temps d'un festival une salle de concert pour musique ...

2010

Study of an octahedral antenna for both sound pressure level estimation and 3D localization of multiple sources

Xavier Falourd, Hervé Lissek, Patrick Marmaroli

This study deals with localization and characterization of multiple sources by mean of an octahedral array processing. We show how correlations enable to both localize more sources that the number of sensors and estimate their sound level pressure simultan ...

2010

Caractérisation acoustique spatiale de salles : étude énergétique des premières réflexions

Xavier Falourd, Hervé Lissek, Lukas Rohr

Toute production de musique ou de parole dans un espace clos fait intervenir en amont des questionnements d’acoustique. Pour offrir à l’auditeur des conditions d’écoute optimales, l’acousticien utilise des descripteurs caractérisant le champ sonore. Les mé ...

2010

Spatial echogram analysis of a small auditorium with observations on the dispersion of early reflections

Xavier Falourd, Hervé Lissek, Lukas Rohr

Classical room acoustics are based on the interpretation of different sound attributes such as reverberation time, clarity and spatial decay. Based on echograms calculated from a microphone array, the dispersion of early reflections is measured and the ref ...

2010

Tomographie acoustique du Léman

Xavier Falourd

The main objective was to show that the acoustic tomography constitutes a new method to investigate the main hydrodynamical processes of the lake of Geneva. The work is based of the various related fields to the tomography, namely : acoustic wave propagati ...

EPFL2005