Temporal Integration of Sinusoidal Increments in the Absence of Absolute Energy Cues Classical temporal integration (TI) is often viewed as a frequency-dependent, energy-based detection process. Detection thresholds for brief sinusoidal increments in either a fixed-level or a random-level broadband pedestal are reported that refute this traditional perspective of TI. Instead, evidence is presented that indicates (a) detection of absolute energy is not ... Research Article
Research Article  |   December 01, 2002
Temporal Integration of Sinusoidal Increments in the Absence of Absolute Energy Cues
 
Author Affiliations & Notes
  • C. Formby, PhD
    Division of Otolaryngology—HNS University of Maryland School of Medicine Baltimore
  • M. G. Heinz
    Speech and Hearing Sciences Program Massachusetts Institute of Technology Cambridge
  • I. V. Aleksandrovsky
    Division of Otolaryngology—HNS University of Maryland School of Medicine Baltimore
  • Contact author: Craig Formby, PhD, 16 S. Eutaw Street, Suite 500, Division of Otolaryngology–HNS, University of Maryland School of Medicine, Baltimore, MD 21201. E-mail: cformby@smail.umaryland.edu
  • * Currently affiliated with Johns Hopkins University, Baltimore, MD
    Currently affiliated with Johns Hopkins University, Baltimore, MD×
  • ** Currently affiliated with Florida Medical Center and Nova Southeastern University, Ft. Lauderdale, FL
    Currently affiliated with Florida Medical Center and Nova Southeastern University, Ft. Lauderdale, FL×
Article Information
Hearing & Speech Perception / Acoustics / Hearing / Research Articles
Research Article   |   December 01, 2002
Temporal Integration of Sinusoidal Increments in the Absence of Absolute Energy Cues
Journal of Speech, Language, and Hearing Research, December 2002, Vol. 45, 1285-1296. doi:10.1044/1092-4388(2002/103)
History: Received April 12, 2001 , Accepted April 9, 2002
 
Journal of Speech, Language, and Hearing Research, December 2002, Vol. 45, 1285-1296. doi:10.1044/1092-4388(2002/103)
History: Received April 12, 2001; Accepted April 9, 2002
Web of Science® Times Cited: 2

Classical temporal integration (TI) is often viewed as a frequency-dependent, energy-based detection process. Detection thresholds for brief sinusoidal increments in either a fixed-level or a random-level broadband pedestal are reported that refute this traditional perspective of TI. Instead, evidence is presented that indicates (a) detection of absolute energy is not necessary for the TI effect and (b) the frequency dependence of TI is consistent with variations across frequency in peripheral auditory tuning, rather than the integration process per se. When peripheral frequency selectivity is controlled, TI can be explained by a frequencyinvariant integration process over at least the frequency range from 500 to 4000 Hz. This process is characterized by threshold improvements of 8–9 dB per decade increase in duration for increment durations between 10 and 300 ms.

Acknowledgments
This project was supported in part by the Office of Naval Research through a Multi-University Research Initiative (Shihab Shamma, P.I.) and by NIH Awards T32DC00038 and 1K24DC00183. Chinneta Pettaway-Willis and Tonia Cain provided editorial assistance, and Guinn Sherlock assisted in the preparation of the figures.
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