Download or read book Virtual Auditory Space Generation and Applications written by Simon Carlile and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: An illusion of auditory space can be generated by the appropriate filtering of sounds presented over headphones: the so-called virtual auditory space (VAS). This book provides a bridge between many of the different disciplines that are involved in developing and exploiting this technology. The first part is fairly introductory in nature, while the second examines a number of issues relating to the generation of high fidelity virtual auditory space. The last two chapters review current research applications of VAS.
Download or read book Virtual Auditory Space written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of Contents --Auditory space -- The physcial and psychological basis of sound localization -- Digital signal processing for the auditory scientist: a tutorial introduction.
Download or read book Virtual Auditory Space written by Simon Carlile and published by R G Landes Company. This book was released on 1996 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Efficient Representation of Adaptable Virtual Auditory Space written by Michael C. Kelly and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Creation of a System for Real Time Virtual Auditory Space and Its Application to Dynamic Sound Localization written by Jacob William Scarpaci and published by . This book was released on 2006 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The study of sound localization has historically been done using stationary sources with no head movement, in part due to technological constraints. One way of studying sound localization is to use virtual auditory space (VAS) stimuli; in this approach a filtered sound is presented over headphones with the filter designed to create eardrum pressures that match those created by a loudspeaker located in real space. These filters, called spatialization filters, are designed to simulate a sound-source in an arbitrary location. This thesis used VAS stimuli to explore how movement of the head or sound source can affect the perceived location of a sound. There are three parts to this thesis: (1) the creation of a system capable of rendering dynamic auditory scenes; (2) the development of effective spatialization filters that account for movement of the sound source relative to the head; and (3) an investigation into how subjects perform in tasks that utilize dynamic auditory stimuli. In the system design, two key aspects were the ability to change the spatialization filters dynamically and the small system delay between a head movement and the corresponding update to the filter. The key issue related to the use of Head Related Transfer Functions (HRTFs) as spatialization filters was the requirement of a smooth percept as the virtual source moves, in particular the interpolation between measured HRTFs. A set of human listening experiments were conducted to study several aspects of the perception of dynamic stimuli. Specifically, reaction times in response to dynamic sound stimuli as well as the subject's ability to follow a moving virtual source were measured. Measurements of system performance showed that a cost effective, flexible, and open-source system could be developed that is capable of dynamic simulations with system delays less than 7 ms. In dynamic experiments, auditory perception was found to be affected by shorter system delays then previously thought relevant. Human tracking data were obtained and used to develop a model that describes a subject's interaction with spatially dynamic sound sources.
Download or read book Generating a Virtual Auditory Space with Near field and Measured Room Acoustics written by Alan H. Kan and published by . This book was released on 2009 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Auditory Space Modeling and Virtual Auditory Environment Simulation written by Jiashu Chen and published by . This book was released on 1992 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Virtual Auditory Space Individual Differences written by J. Middlebrooks and published by . This book was released on 1998 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Head related transfer functions (HRTFs) capture the direction dependent filter characteristics of the external ears. When a sound is filtered by HRTFs measured from a listener's own ears and played over headphones, the listener hears a virtual source that is well localized in space. When sounds were filtered by other listeners' HRTFs, listeners showed fairly accurate localization in the lateral dimension but showed conspicuous vertical and front/back errors. We examined differences among HRTFs measured from 45 listeners. We quantified differences by subtracting HRTFs between listeners for corresponding locations, then computing the variance of the resulting difference spectra across 393 locations. Interlistener differences could be reduced by shifting HRTFs scaling in frequency. Optimal scalars reduced variances by an average of 20.2% across all pairs of listeners and by more than 50% in 9.5% of listener pairs. The optimal scalar for any pair of listeners correlated highly with the relative sizes of certain physical dimensions. When HRTFs were shifted optimally then used in virtual localization trials, all measures of virtual localization performance tended to improve. In the majority of cases, the performance penalty for use of HRTFs from another listener was reduced by more than half.
Download or read book Spatial Hearing written by Jens Blauert and published by MIT Press. This book was released on 1997 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of spatial hearing has exploded in the decade or so since Jens Blauert's classic work on acoustics was first published in English. This revised edition adds a new chapter that describes developments in such areas as auditory virtual reality (an important field of application that is based mainly on the physics of spatial hearing), binaural technology (modeling speech enhancement by binaural hearing), and spatial sound-field mapping. The chapter also includes recent research on the precedence effect that provides clear experimental evidence that cognition plays a significant role in spatial hearing.The remaining four chapters in this comprehensive reference cover auditory research procedures and psychometric methods, spatial hearing with one sound source, spatial hearing with multiple sound sources and in enclosed spaces, and progress and trends from 1972 (the first German edition) to 1983 (the first English edition) -- work that includes research on the physics of the external ear, and the application of signal processing theory to modeling the spatial hearing process. There is an extensive bibliography of more than 900 items.
Download or read book Rendering Localized Spatial Audio in a Virtual Auditory Space written by Dmitry Nikolaevich Zotkin and published by . This book was released on 2002 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-quality virtual audio scene rendering is a must for emerging virtual and augmented reality applications, for perceptual user interfaces, and sonification of data. We describe algorithms for creation of virtual auditory spaces by rendering cues that arise from anatomical scattering, environmental scattering, and dynamical effects. We use a novel way of personalizing the head related transfer functions (HRTFs) from a database, based on anatomical measurements. Details of algorithms for HRTF interpolation, room impulse response creation, HRTF selection from a database, and audio scene presentation are presented. Our system runs in real time on an office PC without specialized DSP hardware.
Download or read book Using Virtual Reality to Understand the Brain written by Michael L. Spezio and published by . This book was released on 2002 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book How and Why Does Spatial Hearing Ability Differ among Listeners What Is the Role of Learning and Multisensory Interactions written by Guillaume Andéol and published by Frontiers Media SA. This book was released on 2016-08-29 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spatial-hearing ability has been found to vary widely across listeners. A survey of the existing auditory-space perception literature suggests that three main types of factors may account for this variability: - physical factors, e.g., acoustical characteristics related to sound-localization cues, - perceptual factors, e.g., sensory/cognitive processing, perceptual learning, multisensory interactions, - and methodological factors, e.g., differences in stimulus presentation methods across studies. However, the extent to which these–and perhaps other, still unidentified—factors actually contribute to the observed variability in spatial hearing across individuals with normal hearing or within special populations (e.g., hearing-impaired listeners) remains largely unknown. Likewise, the role of perceptual learning and multisensory interactions in the emergence of a multimodal but unified representation of “auditory space,” is still an active topic of research. A better characterization and understanding of the determinants of inter-individual variability in spatial hearing, and of its relationship with perceptual learning and multisensory interactions, would have numerous benefits. In particular, it would enhance the design of rehabilitative devices and of human-machine interfaces involving auditory, or multimodal space perception, such as virtual auditory/multimodal displays in aeronautics, or navigational aids for the visually impaired. For this Research Topic, we have considered manuscripts that: - present new methods, or review existing methods, for the study of inter-individual differences; - present new data (or review existing) data, concerning acoustical features relevant for explaining inter-individual differences in sound-localization performance; - present new (or review existing) psychophysical or neurophysiological findings concerning spatial hearing and/or auditory perceptual learning, and/or multisensory interactions in humans (normal or impaired, young or older listeners) or other species; - discuss the influence of inter-individual differences on the design and use of assistive listening devices (rehabilitation) or human-machine interfaces involving spatial hearing or multimodal perception of space (ergonomy).
Download or read book Mapping Auditory Space Onto Visual Space in Virtual Environments written by Eric Danas and published by . This book was released on 1995 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Individual of Spectral Cues for Applications in Virtual Auditory Space written by David Schönstein and published by . This book was released on 2012 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spaces Speak Are You Listening written by Barry Blesser and published by MIT Press. This book was released on 2009-09-18 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: How we experience space by listening: the concepts of aural architecture, with examples ranging from Gothic cathedrals to surround sound home theater. We experience spaces not only by seeing but also by listening. We can navigate a room in the dark, and "hear" the emptiness of a house without furniture. Our experience of music in a concert hall depends on whether we sit in the front row or under the balcony. The unique acoustics of religious spaces acquire symbolic meaning. Social relationships are strongly influenced by the way that space changes sound. In Spaces Speak, Are You Listening?, Barry Blesser and Linda-Ruth Salter examine auditory spatial awareness: experiencing space by attentive listening. Every environment has an aural architecture.The audible attributes of physical space have always contributed to the fabric of human culture, as demonstrated by prehistoric multimedia cave paintings, classical Greek open-air theaters, Gothic cathedrals, acoustic geography of French villages, modern music reproduction, and virtual spaces in home theaters. Auditory spatial awareness is a prism that reveals a culture's attitudes toward hearing and space. Some listeners can learn to "see" objects with their ears, but even without training, we can all hear spatial geometry such as an open door or low ceiling. Integrating contributions from a wide range of disciplines—including architecture, music, acoustics, evolution, anthropology, cognitive psychology, audio engineering, and many others—Spaces Speak, Are You Listening? establishes the concepts and language of aural architecture. These concepts provide an interdisciplinary guide for anyone interested in gaining a better understanding of how space enhances our well-being. Aural architecture is not the exclusive domain of specialists. Accidentally or intentionally, we all function as aural architects.
Download or read book Head Related Transfer Function and Virtual Auditory Display written by Bosun Xie and published by J. Ross Publishing. This book was released on 2013-07-23 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book systematically details the basic principles and applications of head-related transfer function (HRTF) and virtual auditory display (VAD), and reviews the latest developments in the field, especially those from the author’s own state-of-the-art research group. Head-Related Transfer Function and Virtual Auditory Display covers binaural hearing and the basic principles, experimental measurements, computation, physical characteristics analyses, filter design, and customization of HRTFs. It also details the principles and applications of VADs, including headphone and loudspeaker-based binaural reproduction, virtual reproduction of stereophonic and multi-channel surround sound, binaural room simulation, rendering systems for dynamic and real-time virtual auditory environments, psychoacoustic evaluation and validation of VADs, and a variety of applications of VADs. This guide provides all the necessary knowledge and latest results for researchers, graduate students, and engineers who work in the field of HRTF and VAD.
Download or read book Auditory Neuroscience written by Jan Schnupp and published by MIT Press. This book was released on 2012-08-17 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated overview of hearing and the interplay of physical, biological, and psychological processes underlying it. Every time we listen—to speech, to music, to footsteps approaching or retreating—our auditory perception is the result of a long chain of diverse and intricate processes that unfold within the source of the sound itself, in the air, in our ears, and, most of all, in our brains. Hearing is an "everyday miracle" that, despite its staggering complexity, seems effortless. This book offers an integrated account of hearing in terms of the neural processes that take place in different parts of the auditory system. Because hearing results from the interplay of so many physical, biological, and psychological processes, the book pulls together the different aspects of hearing—including acoustics, the mathematics of signal processing, the physiology of the ear and central auditory pathways, psychoacoustics, speech, and music—into a coherent whole.
