Development and Comparison of Three-dimensional Audio Systems PDF Download
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Author: Shen Flindell
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Shen Flindell
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
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ISBN:
Category : Acoustic localization
Languages : en
Pages :
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Over the last few years one of the most promising advances for Human Machine Interfaces (HMI) has been the development of 3-Dimensional Audio (3-D Audio). The Air Operations Division of DSTO has been engaged in an extensive research program developing 3-D audio for the military aviation environment. This document is intended to provide some general background and to list some of the broader requirements that need to be considered when designing any 3-D audio system. Included in this report is some background information describing the perceptual basis of 3-D audio, a brief review of some of the research associated with the development of 3-D audio, a discussion of the hardware and software requirements for the implementation of 3-D audio, a brief survey of current commercial 3-D audio systems, and some discussion of the issues that require further consideration.
Author: Adel Senki
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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It is anticipated that 3-D sound will become a major component in virtual reality environments. In this thesis, we investigate the development of a Windows(TM) 3-D sound system using binaural technology. This work should eventually be integrated in complex virtual environment software. The 3-D sound effects are achieved by applying a filter pair representing audio cues from a specific point in space to the left and right channels of headphones. As a first step, an offline 3-D audio file generation system is developed, and effects such as sound reflections in a virtual rectangular room are added to this system. The real-time implementation is considered next. The first approach tested for the real-time implementation uses the time domain convolution of a sound source signal with head-related transfer functions, but the computational load of this approach is such that it cannot run in real-time at audio sampling rates. As an alternative, a second approach with a Fast Fourier Transform overlap and save technique is used to reduce the computational load, and a real-time implementation at audio frequencies is therefore successfully achieved.
Author: William G. Gardner
Publisher: Springer Science & Business Media
ISBN: 9780792381563
Category : Technology & Engineering
Languages : en
Pages : 176
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3-D Audio Using Loudspeakers is concerned with 3-D audio systems implemented using a pair of conventional loudspeakers. A well-known problem with these systems is the requirement that the listener be properly positioned for the 3-D illusion to function correctly. This book proposes using the tracked position of the listener's head to optimize the acoustical presentation, thus producing a much more realistic illusion over a larger listening area than existing loudspeaker 3-D audio systems. Head-tracking can be accomplished by applying pattern recognition techniques to images obtained from a video camera. Thus, an immersive audio environment can be created without donning headphones or other equipment. 3-D Audio Using Loudspeakers discusses the theory, implementation, and testing of a head-tracked loudspeaker 3-D audio system. Crosstalk cancellers that can be steered to the location of a tracked listener are described. The objective performance of these systems has been evaluated using simulations and acoustical measurements made at the ears of human subjects. Many sound localization experiments were also conducted; the results show that head-tracking both significantly improves localization when the listener is displaced from the ideal listening location, and also enables dynamic localization cues. Much of the theory and experimental results presented are also applicable to loudspeaker 3-D audio systems in general, not just head-tracked ones. 3-D Audio Using Loudspeakers is of interest to researchers studying virtual acoustic displays, and to engineers developing the same. The book serves as a valuable reference to anyone working in this field.
Author: Durand R. Begault
Publisher:
ISBN:
Category : Computer sound processing
Languages : en
Pages : 248
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![OE [publication] PDF](https://books.google.com/books/content/images/frontcover/IrUfAQAAMAAJ?fife=w80-h100)
Author:
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ISBN:
Category :
Languages : en
Pages : 690
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Category : Aeronautics
Languages : en
Pages : 456
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Giovanni Coticchio
Publisher: Springer Science & Business Media
ISBN: 0857298267
Category : Health & Fitness
Languages : en
Pages : 361
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Book Description
The oocyte is the largest and most mysterious cell in the body of mammalian organisms. Through its growth and maturation, it reaches extreme levels of specialization, while maintaining at the same time a condition of totipotency. Its unique ability, in co-operation with the spermatozoon, to give rise to a fully developed organism formed from hundreds of different tissues and myriads of individual cells has inspired intellectuals of all ages. Oogenesis finds impetus and purpose in casting scientific perspective towards this unique cell for the benefit of scientists and assisted reproductive technology (ART) specialists. The authors of the chapters are distinguished authorities in their respective areas of competence. From the opening of the book the reader is lead on a fantastic voyage from the formation of the primordial oocyte to the development of the early embryo, passing through crucial processes of oogenesis, such as co-ordination of oocyte and follicle growth, gene expression and organelle reorganization during growth and maturation, epigenetic mechanisms, regulation of meiosis, totipotency, cell polarity, oogenesis in vitro and maternal regulation of early development.
Author: Michael Wozniewski
Publisher:
ISBN:
Category : Shared virtual environments
Languages : en
Pages : 106
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"Immersive virtual environments offer the possibility of natural interaction within a virtual world that is familiar to users because it is based on everyday activity. The use of such environments for the representation and control of 3-D sound remains largely unexplored. We propose a novel paradigm for interacting with sound and using virtual space as the medium for spatial audio processing. A supporting software framework has been developed that provides functionality not available in other 3-D audio systems, including powerful control over the directivity of sound and the ability to bend the rules of physics for musical purposes. These features provide the necessary tools to create virtual scenes for audio engineering, musical creation, listening, and performance. Tracking technology allows the use of gesture-based interaction techniques to control the environment, resulting in many possibilities for novel applications." --
Author: Educational Research Information Center (U.S.)
Publisher:
ISBN:
Category : Education
Languages : en
Pages : 696
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