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Resolution in an Artificially Generated Multiple Object Auditory Sensations Space Using New Auditory Sensations

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Auditory space, produced by means of a Continuous Transmission Frequency Modulated (C.T.F.M.) wide beam, wide band sonar, has been used in a sensory aid for the blind for some time. Yet, no satisfactory definition of auditory resolution which is directly related to spatial resolution, has been obtained and measured by controlled experiments. In this paper, laboratory experiments, using realistic system simulation techniques are described which determine the ability of subjects to resolve objects in space by auditory means, under both static and dynamic conditions. It is shown that while the auditory frequency resolution is poor under static conditions, it is significantly improved in the dynamic case. The Doppler effect, involving doubling the rate of change of the audio frequency, plays a significant part in this improvement. An increase in relative velocity of an object may also enhance the resolution capability quantitatively as well as qualitatively to an extent that signals may be resolved cognitively before the subject's reaction can take place.
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Document Type: Research Article

Publication date: September 1, 1976

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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