16 papers · ranked by Valyu relevance
Yankai Zhang, Qian Xiang, Qiaoxi Zhu, Antonio Moschitta
Differential beamforming has attracted much research since it can utilize an array with a small aperture size to form frequency-invariant beampatterns and achieve high directional gains. It has recently been applied to the loudspeaker line array to produce a broadside frequency-invariant radiation pattern. However…
Rafaely, Boaz, Khaykin, Dima
Spherical loudspeaker arrays have been recently studied for directional sound radiation, where the compact arrangement of the loudspeaker units around a sphere facilitated the control of sound radiation in three-dimensional space. Directivity of sound radiation, or beamforming, was achieved by driving each loudspeaker…
Thomas Dietzen, Randall Ali, Maja Taseska, Toon van Waterschoot
In the development of acoustic signal processing algorithms, their evaluation in various acoustic environments is of utmost importance. In order to advance evaluation in realistic and reproducible scenarios, several high-quality acoustic databases have been developed over the years. In this paper, we present another…
Julius O. Smith
A simple approach to microphone- and speaker-arrays is described in which the microphone array is regarded as a sampling grid for the acoustic field, and the corresponding speaker-array is treated as a "spatial digital to analog converter" that reconstructs the acoustic field from its spatial samples. Advantages of…
Bartlomiej Chojnacki, Farook Sattar, Niladri Bihari Puhan, Reza Fazel-Rezai
'Reza Fazel-Rezai'] Electroacoustic transducers represent one of the crucial materials used in the construction of loudspeaker arrays. The dispersion in their parameters may influence the performance of a speaker set. Parametric loudspeaker arrays and omnidirectional sound sources have been used for years. However, the…
Noman Akbar, Glenn Dickins, Mark R. Thomas, Prasanga N. Samarasinghe + 1 more
'Thushara D. Abhayapala'] We propose a straightforward and cost-effective method to perform diffuse soundfield measurements for calibrating the magnitude response of a microphone array. Typically, such calibration is performed in a diffuse soundfield created in reverberation chambers, an expensive and time-consuming…
Chesney Buyle, Lieven De Strycker, Liesbet Van der Perre, Alberto Bernardini
'Alberto Bernardini'] Accurately positioning energy-constrained devices in indoor environments is of great interest to many professional, care, and personal applications. Hybrid RF-acoustic ranging systems have shown to be a viable technology in this regard, enabling accurate distance measurements at ultra-low energy…
Hongmin Ahn, Kyounghun Been, In-Dong Kim, Chong Hyun Lee + 1 more
'Wonkyu Moon'] A parametric array (PA) loudspeaker is a highly directional audio source that might grant one's convenience if it is used with mobile devices. However, conventional PA loudspeakers is almost impossible to apply in mobile devices using a battery because of the large power consumption and large device…
Hai Morgenstern, Boaz Rafaely, Markus Noisternig
Spherical microphone arrays (SMAs) and spherical loudspeaker arrays (SLAs) facilitate the study of room acoustics due to the three-dimensional analysis they provide. More recently, systems that combine both arrays, referred to as multiple-input multipleoutput (MIMO) systems, have been proposed due to the added spatial…
Nima Zargarnezhad, Bruno Mesquita, Ewan A Macpherson, Ingrid Johnsrude
Higher-order ambisonic rendering is an increasingly common acoustic field reproduction technique that enables presentation of virtual sounds at nearly any location in 3D space, relatively unconstrained by the veridical locations of loudspeakers. We evaluated whether 3D sound reproduction through a 9^th^ order ambisonic…
Pedro Izquierdo Lehmann, Rodrigo F. Cádiz, Carlos Sing‐Long
The sweet spot can be interpreted as the region where acoustic sources create a spatial auditory illusion. We study the problem of maximizing this sweet spot when reproducing a desired sound wave using an array of loudspeakers. To achieve this, we introduce a theoretical framework for spatial sound perception that can…
Katarina C. Poole, Drew Cappotto, Vincent Martin, Jakub Sztandera + 3 more
The ability to detect changes in complex auditory scenes is crucial for human survival, yet the neural mechanisms underlying this process remain elusive. This study investigates how the presence and location of sound sources impacts active auditory change detection as well as neural correlates of passive change…
Carol A. Sammeth, Kerry A. Walker, Nathaniel T Greene, Achim Klug + 1 more
Sensorineural hearing loss is common with advancing age, but even with normal or near-normal hearing in older persons, performance deficits are often seen for suprathreshold listening tasks such as understanding speech in background noise or localizing sound direction. This suggests there is also a more central source…
Fotis Georgiou, Claudia Kawai, Beat Schäffer, Reto Pieren
This paper introduces a methodology tailored to capture, post-process, and replicate audio-visual data of outdoor environments (urban or natural) for VR experiments carried out within a controlled laboratory environment. The methodology consists of 360 $^\circ$ video and higher order ambisonic (HOA) field recordings…
Alexander Kazakov, Nelken Israel
Background: The sound fed to a loudspeaker may significantly differ from that reaching the ear of the listener. The transformation from one to the other consists of spectral distortions with strong dependence on the relative locations of the speaker and the listener as well as on the geometry of the environment. With…
Florian Camerer
The design of a 9-channel microphone system for location recording of mainly atmospheres will be described. The key concept is matching the recording and reproduction angles of the individual sectors. The rig is designed for the AURO-3D 9-channel playback system (4 height speakers). An analysis of the reproduction…