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Spectral and temporal integration of brief tones

Hoglund, Evelyn M.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1186528279

Abstract Details

2007, Doctor of Philosophy, Ohio State University, Speech and Hearing Science.
Spectral and temporal processing have an extensive history of research for the discrimination and integration of tones. The integration of both dimensions simultaneously, however, has received little attention in psychoacoustics. This dual integration is vital to our daily processing of sounds around us, and has also not been effectively addressed in the ecological acoustics research. For this reason, we still have essentially no understanding of how the auditory system processes sounds that are changing in both frequency and time domains at the same time. This study was designed to begin the process of measuring the basic detection of signals that vary in both spectral and temporal dimensions. Baseline measures of detection for 10 msec pure tones were taken and the levels adjusted so that all the frequencies could be detected at the same level of attenuation. The thresholds were then obtained for spectral integration of the signals and for temporal integration, so that these results could be compared with prior research. The signals were then varied on both dimensions simultaneously in several ways: with equal spectral and temporal step sizes, different spectral and temporal step sizes, random presentation, and with doubled spectral or temporal information. The data were also analyzed along several differences: spectral step size, temporal step size, frequency range, direction, slope, and predictability. The spectral and temporal integration conditions showed a good match with the results of prior research, showing that the current procedures and signals could be used to reliably compare to existing results. The spectrotemporal integration conditions showed the threshold for overall detection of the signals to be limited by the ability to integrate spectral information, while the temporal integration was much better. Additionally, very little influence could be seen by most of the differences in signals. Surprisingly, random presentation of frequencies did not negatively influence detection; rather, results indicated that differences in step size between the dimensions were a greater factor in the measured thresholds.
Lawrence Feth (Advisor)
107 p.
spectral integration; temporal integration; spectrotemporal integration; brief tones; multiple looks; psychoacoustics

Recommended Citations

Citations

  • Hoglund, E. M. (2007). Spectral and temporal integration of brief tones [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1186528279

    APA Style (7th edition)

  • Hoglund, Evelyn. Spectral and temporal integration of brief tones. 2007. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1186528279.

    MLA Style (8th edition)

  • Hoglund, Evelyn. "Spectral and temporal integration of brief tones." Doctoral dissertation, Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1186528279

    Chicago Manual of Style (17th edition)

osu1186528279
691
© 2007, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.