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Thursday, July 30, 2020 | History

3 edition of Psychophysical evaluation of three-dimensional auditory displays found in the catalog.

Psychophysical evaluation of three-dimensional auditory displays

Frederic Wightman

Psychophysical evaluation of three-dimensional auditory displays

semiannual progress report

by Frederic Wightman

  • 366 Want to read
  • 37 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC], [Springfield, Va.? .
Written in English

    Subjects:
  • Principal components analysis.,
  • Acoustic imaging.

  • Edition Notes

    Other titlesPsychophysical evaluation of three dimensional auditory displays.
    StatementFrederic L. Wightman; principal investigator.
    SeriesNASA-CR -- 189848., NASA contractor report -- NASA CR-189848.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14685237M

    Psychophysical calibration of whole-body vibration in the display of impact events in auditory and haptic virtual environments Conference Paper November with 7 Reads How we measure 'reads'. Next, it gives an overview of the auditory display and its relationship to the visual display, emphasizing the roles played by the apparent location of sound sources and the repetition of sounds in time. Finally, the paper discusses the current prototype sound system and some of the difficulties to be faced in implementing the proposed facility.

    Psychophysical estimates of frequency selectivity obtained by deriving auditory filter (AF) shapes using the notched-noise method (Patterson et al., ) have shown frequency selectivity to be negatively correlated with audiometric threshold at the signal frequency (f s) (e.g., Peters and Moore, ). Thus for individuals with even mild to.   Introduction. Colour vision assessment is an important tool to colour vision screening or to select candidates for some specific jobs where normal trichromatic vision is desirable or mandatory (e.g., colour matching and assessment in the textiles or paint industries, grading of gemstones) [1,2].In addition, it has been demonstrated that colour vision assessment has high diagnostic and.

    Typically, auditory discrimination abilities in adult listeners are assessed using behavioral measures. Such psychophysical measures can provide useful information about a listener's auditory perception of a dynamic sound. However, performing these measures requires a significant amount of linguistic experience and cognitive ability. Masking In Three-dimensional Auditory Displays II: Effects Of Spatial And Spectral Simil2irity. None. Applications of virtual auditory displays. Current technology makes it possible to simulate naturally-occurring spatial auditory cues quite accurately. However, the cost of such a system is not justifiable, or even desirable, for all applications.


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Psychophysical evaluation of three-dimensional auditory displays by Frederic Wightman Download PDF EPUB FB2

Psychophysical evaluation of three-dimensional auditory displays Wightman, Frederic L. Abstract. Work during this reporting period included the completion of our research on the use of principal components analysis (PCA) to model the acoustical head related transfer functions (HRTFs) that are used to synthesize virtual sources for three Author: Frederic L.

Wightman. Get this from a library. Psychophysical evaluation of three-dimensional auditory displays: annual progress report, period covered, 5/1//30/95, NASA cooperative research agreement NCC [Frederic L Wightman; United States. National Aeronautics and Space Administration.].

Get this from a library. Psychophysical evaluation of three-dimensional auditory displays: semiannual progress report. [Frederic Wightman; United States. National Aeronautics and. Psychophysical evaluation of three-dimensional auditory displays: NTRS Full-Text: View Document [PDF Size: KB] Author and Affiliation: Wightman, Frederic L.

(Wisconsin Univ., Madison, WI, United States) Abstract: Work during this reporting period included the completion of our research on the use Psychophysical evaluation of three-dimensional auditory displays book principal components analysis (PCA) to Author: Frederic L.

Wightman. Psychophysical Evaluation of Three-Dimensional Auditory Displays Frederic L. Wightman, Ph.D., Principal Investigator Waisman Center, University of Wisconsin Highland Avenue Madison, WI (NASA-CR) PSYCHOPHYSICAL EVALUATION OF THREE-DIMENSIONAL AUDITORY DISPLAYS Annual Progress Report, I May - 30 Apr.

(Wisconsin Univ. The CRA proposed a program of applied psychophysical research designed to determine the requirements and limitations of three-dimensional (3-D) auditory display systems.

These displays present synthesized stimuli to a pilot or virtual workstation operator that evoke auditory images at predetermined positions in space. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Psychophysical evaluation of three-dimensional auditory displays. By Frederic L. Wightman. Abstract. Work during this reporting period included the completion of our research on the use of principal components analysis (PCA) to model the acoustical head related transfer functions (HRTFs) that are used to synthesize virtual sources for three.

The fidelity of reproducing free-field sounds using a virtual auditory display was investigated in two experiments. In the first experiment, listeners directly compared stimuli from an actual loudspeaker in the free field with those from small headphones placed in front of the ears.

Headphone stimuli were filtered using head-related transfer functions (HRTFs), recorded while listeners were. A psychophysical detection test was used to measure the response of human subjects to ‘good’ and ‘bad’ smells.

Different intensities and frequencies of odour stimulation were delivered by an olfactometer and the responses to a group of malodours (valeric acid, skatol, butyric acid) and pleasant smells (amyl acetate, cishexenol, linalool) were compared. psychophysical research designed to determine the requirements and limitations of three-dimensional (3-D) auditory display systems.

These displays present synthesized stimuli to a pilot or virtual workstation operator that evoke auditory images at predetermined positions in space. The images can be either stationary or moving. Fidelity of three-dimensional-sound reproduction using a virtual auditory display Article (PDF Available) in The Journal of the Acoustical Society of America (1) February with.

To assess binaural unmasking at the suprathreshold level, the amplitude ratios of N1m under the S 0 N 0 and S pi N 0 conditions for Hz (A2/A1 in Fig. 2A) are plotted as a function of relative signal level (compared to the psychophysical threshold under the S 0 N 0 condition) in Fig.

binaural unmasking effects at the suprathreshold level decreased as the signal level increased. Table summarizes the advantages and disadvantages of monaural, stereo, and three-dimensional audio displays.

When combined with the global positioning system, the three-dimensional audio display could present the radio communications of an individual's squad members in the direction they are relative to him.

Psychophysical Evaluation of Three-Dimensional Auditory Displays Frederic L. Wightman, Ph. D., Principal Investigator Waisinan Center, University of Wisconsin Highland Avenue Madison, WI (NASA-CR) PSYCHOPHYSICAL EVALUATION N OF THREE-DIMENSIONAL AUDITORY DISPLAYS.

A true three-dimensional auditory display could the careful psychophysical evaluation of listeners’ ability to accurately localize the virtual or synthetic sound. This paper sums up the previous research on Head-Related Transfer Function (HRTF) individualization for three-dimensional (3D) virtual auditory display.

Papers which involve experiment research, theoretical computation research, and applications of 3D virtual auditory display based on HRTFs have been reviewed. A series of experiments was conducted to evaluate 3D auditory beacons to be used by drivers of remote‐controlled vehicles.

The auditory beacons were generated from an external sound source, conditioned using the Convolvotron T M and then presented through Sennheiser HD‐ earphones.

In addition, a pink noise masker was presented through an overhead loudspeaker at a level of 80 dBA. Toxic effects on sensory systems have rarely been evaluated by psychophysical methods. As examples of possible applications four studies are described.

Sodium salicylate and kanamycin, both reported to produce hearing deficits in man, have also been demonstrated to affect auditory thresholds in monkeys.

Bridget Lewis and Carryl Baldwin. Comparison of Traditional Psychophysical and Sorting Methods for In-Vehicle Display Design. Proceedings of the Human Factors and Ergonomics Society, 59(1), Google Scholar; Bridget Lewis, Jesse Eisert, Daniel Roberts, and Carryl Baldwin.

Designing Unambiguous Auditory Crash Warning Systems. Thus, our results suggest that auditory streaming in rats is only observed when an adequate behavioral evaluation is used, and that, similar to the case in humans, ΔF-dependent auditory streaming in rats is more likely to occur with short ITIs in the ABA- tone paradigm.

Methodological considerations   Physiological and psychophysical evidence indicate that the auditory system is quite sensitive to patterns of interaural cross correlation (IACC). Formation of three-dimensional auditory space. Finally, we elaborate on psychophysical spatial tasks and percepts that are possible just because of the formation of the auditory .