Ignacio Spiousas

Ignacio Spiousas
National Scientific and Technical Research Council | conicet

PhD

About

22
Publications
9,497
Reads
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93
Citations
Introduction
I am currently working on multimodal integration both in the temporal (sensorimotor synchronization) and the spatial (audio-visual space integration) domain.
Additional affiliations
November 2018 - present
National Scientific and Technical Research Council
Position
  • Researcher
Description
  • Multimodal integration on sensorimotor synchronization.
September 2016 - September 2018
McGill University
Position
  • PostDoc Position
Description
  • Effect of sound localization on perceived emotion.
April 2014 - August 2016
National University of Quilmes
Position
  • PostDoc Position
Description
  • Multimodal integration on sensorimotor synchronization.

Publications

Publications (22)
Article
Full-text available
Before the availability of artificial light, moonlight was the only source of light sufficient to stimulate nighttime activity; still, evidence for the modulation of sleep timing by lunar phases is controversial. Here, we use wrist actimetry to show a clear synchronization of nocturnal sleep timing with the lunar cycle in participants living in env...
Article
Full-text available
In this study we evaluated whether a method of direct location is an appropriate response method for measuring auditory distance perception of far-field sound sources. We designed an experimental set-up that allows participants to indicate the distance at which they perceive the sound source by moving a visual marker. We termed this method Cross-Mo...
Article
Full-text available
Previous studies on the effect of spectral content on auditory distance perception (ADP) focused on the physically measurable cues occurring either in the near field (low-pass filtering due to head diffraction) or when the sound travels distances greater than 15 m (high-frequency energy losses due to air absorption). Here, we study how the spectrum...
Article
Full-text available
In this work we report an illusion of proximity of a sound source created by a sonic crystal placed between the source and a listener. This effect seems, at first, paradoxical to naïve listeners since the sonic crystal is an obstacle formed by almost densely packed cylindrical scatterers. Even when the singular acoustical properties of these period...
Article
Full-text available
This letter demonstrates the mechanical tuning of modes confined in two-dimensional acoustic cavities based on anisotropic metafluids. The employed metafluids have been designed with effective parameters such that the radial component of the sound speed tensor keeps constant and the acoustic impedance remains finite along the tuning. It is shown th...
Article
This study aimed to test the hypothesis that associates blindness with a reduced ability to judge the absolute distance from sound sources. Our working hypotheses were the following: (a) Within reach, a blind subject will be able to make up for the lack of vision using proprioceptive information to calibrate the acoustic distance perception cues. (...
Preprint
Full-text available
The Covid-19 pandemic and associated lockdowns triggered worldwide changes in the daily routines of human experience. The Blursday database provides measures of subjective time and related processes from more than 2,800 participants (over 9 countries) tested on 14 questionnaires and 15 behavioral tasks during the Covid-19 pandemic. The easy-to-proc...
Article
Full-text available
Time reversal (TR) focusing of acoustical waves is a widely studied phenomenon that usually requires a chaotic cavity or disordered scattering medium to achieve spatial and frequency decorrelation of the acoustic field when using a single channel. On the other hand, sonic crystals were disregarded as scattering media for the TR process because of t...
Article
Full-text available
Many species synchronize reproductive behavior with a particular phase of the lunar cycle to increase reproductive success. In humans, a lunar influence on reproductive behavior remains controversial, although the human menstrual cycle has a period close to that of the lunar cycle. Here, we analyzed long-term menstrual recordings of individual wome...
Preprint
Full-text available
As humans transitioned from hunter-gatherer to agricultural to highly urbanized post-industrial communities they progressively created environments that isolated sleep from its ancestral regulators, including the natural light-dark cycle. A prominent feature of this isolation is the availability of artificial light during the night, which delays th...
Article
Full-text available
In a recently published work by our group [Scientific Reports, 7, 7189 (2017)], we performed experiments of visual distance perception in two dark rooms with extremely different reverberation times: one anechoic (T ∼ 0.12 s) and the other reverberant (T ∼ 4 s). The perceived distance of the targets was systematically greater in the reverberant room...
Article
Full-text available
Multi-scattering theory (MST) is an analytical tool which allows for the resolution of the field dispersed (scattered) by an interfering medium after leaving a source. The basis of the method consists in determining the way each inhomogeneity (scatterer) in the medium affects the incident wave, something which ultimately depends on the shape and me...
Conference Paper
We performed a one-channel time-reversal acoustic mirror for a wide-band (30 Hz to 20 kHz) impulse in a 30 × 5 meters (diameter X height) empty cylindrical tank made of concrete, with columns and beams. The time-reversed pulse (or equivalently, the autocorrelation of the impulse response) peaks 30 dB above the temporal sidelobes. We measured the tw...
Article
In this work we present an experimental realization of resonance switching inside a large, relative to the lattice constant, sonic crystal (SC) cavity. The resonances arise from a temporary trapping of the acoustical energy between two sonic crystal slabs when the frequency of the wave falls within a partial band-gap region (thus, the propagation i...
Conference Paper
Full-text available
Sonic crystals are made by the periodic arrangement of hard scatterers in a host medium, such as air, and are efficient devices for controlling the propagation of sound. There is a vast literature that shows many of their extraordinary capacities like forbidden frequency bands, hyperfocusing, self­collimation or negative refraction, and potential a...
Thesis
Full-text available
El objetivo del presente trabajo es investigar las posibles aplicaciones de los cristales sónicos en el control del espacio acústico. Un cristal sónico la forma más simple de obtener un metamaterial acústico y se construye de un arreglo cristalino de cilindros en aire. Los mismos poseen propiedades de transmisión y reflexión no triviales. Ejemplos...
Conference Paper
Full-text available
The ability of subjects to estimate the distance to a sound source in a room relies on the integration of a number of different cues: sound intensity level, direct-to-reverberant energy ratio, spectral content and binaural cues, among others. This work examines how the perception of auditory distance is modified for a particular sound field: the tr...
Article
Full-text available
Both temporal and directional responses of a cavity inside a two-dimensional sonic crystal are investigated. The size of the cavity is large compared to the lattice parameter and the wavelength for the frequency range of interest. Hence, a hybrid method to compute the response is proposed, combining multiscattering theory for the calculation of the...
Article
New acoustic metamaterials offer promising applications, ranging from noise barriers to acoustical diodes. This work applies large-sized sonic crystals to room acoustics. A model of a rectangular room where the walls were replaced by 2-D sonic crystals is proposed. In this way, the room is conceived as a rectangular cavity inside the crystal, and w...

Questions

Question (1)
Question
I am recently working with visually impaired participants and I was wondering if there is any standardized questionnaire or short test (nothing that requires special techniques or apparatus) that would allow us to group them according to their degree of vision loss. It would be better if it was a questionnaire since it would allow me to retrospectively ask past participants for their answers but any help would be much appreciated.
Thanks! Ignacio.

Network

Cited By

Projects

Projects (4)
Project
Time processing during the COVID-19 pandemic
Project
Nos dedicamos a estudiar cómo el cerebro procesa el tiempo en el rango de las centenas de milisegundos (millisecond timing). Este rango incluye los tiempos involucrados en la coordinación muscular, la producción y percepción del habla, la sincronización a la música, la danza, la memoria de trabajo, etc. Nuestro paradigma experimental es la sincronización sensomotora, que es la habilidad principalmente humana que nos permite realizar movimientos en sincronía con un estímulo externo periódico. La tarea paradigmática es finger tapping, o sea sincronizarse a un estímulo periódico golpeteando con el dedo como cuando seguimos el pulso de la música. Realizamos experimentos de perturbaciones (por ejemplo un cambio de tempo) y desarrollamos modelos matemáticos que nos permitan describir el comportamiento en forma unificada y realizar predicciones tanto comportamentales como a nivel de procesamiento neural.
Project
This project aims to develop sonic crystal devices that control the propagation of sound in the audible range and alter the perception of sound sources. An application to contemporary music performance is also intended, as an extension of musical instruments and as a Sonic Crystal Room.