Vari-Sound

Memoli, Gianluca; Chisari, Letizia; Eccles, Jonathan; Caleap, Mihai; Drinkwater, Bruce W.; Subramanian, Sriram

doi:10.1145/3290605.3300713

Cited by 16 publications

(3 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But, imagine that a spot of sound is delivered to a single person in the audience while others around that person cannot perceive it. In another example, in a cinema, the movie audio could be played in different languages and delivered to specific persons in the audience (Memoli et al, 2019a). Figure 1b is a simplified representation of sound "bending" around an object by Norasikin et al (2018).…”

Section: Auditory Stimulation Beyond Headphonesmentioning

confidence: 99%

Multisensory Integration as per Technological Advances: A Review

2021

View full text Add to dashboard Cite

Multisensory integration research has allowed us to better understand how humans integrate sensory information to produce a unitary experience of the external world. However, this field is often challenged by the limited ability to deliver and control sensory stimuli, especially when going beyond audio–visual events and outside laboratory settings. In this review, we examine the scope and challenges of new technology in the study of multisensory integration in a world that is increasingly characterized as a fusion of physical and digital/virtual events. We discuss multisensory integration research through the lens of novel multisensory technologies and, thus, bring research in human–computer interaction, experimental psychology, and neuroscience closer together. Today, for instance, displays have become volumetric so that visual content is no longer limited to 2D screens, new haptic devices enable tactile stimulation without physical contact, olfactory interfaces provide users with smells precisely synchronized with events in virtual environments, and novel gustatory interfaces enable taste perception through levitating stimuli. These technological advances offer new ways to control and deliver sensory stimulation for multisensory integration research beyond traditional laboratory settings and open up new experimentations in naturally occurring events in everyday life experiences. Our review then summarizes these multisensory technologies and discusses initial insights to introduce a bridge between the disciplines in order to advance the study of multisensory integration.

show abstract

Section: Auditory Stimulation Beyond Headphonesmentioning

confidence: 99%

Multisensory Integration as per Technological Advances: A Review

2021

View full text Add to dashboard Cite

show abstract

“…Acoustic metasurfaces are made up of sub-wavelength structures, capable of locally manipulating both phase and intensity of an impinging sound wave in a small footprint. Metasurfaces designed combining analytical and numerical procedures have shown efficient passive sound control over a wide frequency range and in very little space [8,9]. Assembled in meta-filters or acoustic lenses they could cooperate with digital processing of the signal to obtain a desired coverage of a listening area.…”

Section: Introductionmentioning

confidence: 99%

Optimising Metasurface Retrieval by Hill Descending

Chisari,

Philippides,

Memoli

2024

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

View full text Add to dashboard Cite

Delivering a uniform acoustic experience in a space is a well-known challenge. Today, this is achieved stacking many digitally controlled wavefront shape loudspeakers. However, since the directivity of each speaker varies with the frequency, the sound waves do not mate consistently, resulting in a non-uniform sound pressure level, changing with both the frequency and the position of the listener.Here we show how this can be addressed using acoustic metasurfaces, capable of locally manipulating both phase and intensity of a sound wave in a small footprint by changing their geometrical parameters. When coupled at the outlet of a sound source, they could create meta-filters, passively embedding part of the required signal processing, creating sound homogeneity or providing sound effects. The question is: given a desired wavefront, how can the parameters be tuned efficiently? In this study, a method for retrieving an acoustic metasurface through the hill descending algorithm is presented. The algorithm is tested on a simple optimization problem, searching for the best metamaterials combination providing a desired coverage in a reflection-free listening area. Input data are retrieved by finite-element modelling a simplified sound system in a reflection-free venue. Further research is required to validate this method toward multi-objective optimisation.

show abstract

“…Acoustic metamaterials have already proven that they can contribute to obtain more compact and lighter sound systems, allowing an effective directivity control and cancelling emissions in unwanted directions and thus, contributing to deliver the intended acoustic field in the region of interest [8,11]. When coupled at the outlet of a sound source, acoustic metamaterials can create acoustic lenses [7],…”

Section: Introductionmentioning

confidence: 99%

Toward Aberrations Correction in Audio Systems With Acoustic Metamaterials

CHISARI,

MEMOLI,

PHILIPPIDES

2023

Reproduced Sound 2023

View full text Add to dashboard Cite

Immersive audio is crucial for immersive experiences, but the tools aiming to deliver it to the listeners are still limited to headphones and bulky loudspeaker arrays. In this paper, we discuss the possibility of using a single loudspeaker, whose emission is augmented coupling acoustic metamaterial lenses with it, to obtain sound field control and thus to deliver localized sound cues in a 2D environment around a listener. Together with the sound field control, the reduction of the form-factor of the system is obtained. In fact, the realization of personal sound zones typically require at least 13 loudspeakers, placed around the listener but metamaterials have already proven that they can contribute to obtain more compact and lighter audio systems, allowing an effective directivity control and cancelling emissions in unwanted directions and thus, contributing to deliver the intended acoustic field in the region of interest. Just like an optical objective made of only two lenses, however, it was recently found that such a system suffers from the acoustic equivalent of spherical aberration. In this work, inspired by optics, we use numerical methods to design an additional metasurface to passively correct this aberration. Perspectives of combining systems of multiple lenses to correct audio systems will be discussed.

show abstract

Vari-Sound

Cited by 16 publications

References 54 publications

Multisensory Integration as per Technological Advances: A Review

Multisensory Integration as per Technological Advances: A Review

Optimising Metasurface Retrieval by Hill Descending

Toward Aberrations Correction in Audio Systems With Acoustic Metamaterials

Contact Info

Product

Resources

About