Abstract
Forward-masked psychophysical tuning curves were obtained using a fixed, low-level signal at a frequency of 4 kHz, and masker frequencies of 2.0, 2.5, 3.0, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, and 5.5 kHz, at masker-signal gaps of 20, 30, 40, 60, 80, and 100 ms. An adaptive two-interval, two alternative forced-choice (2I-2AFC) procedure was used to obtain the masker level at threshold. This procedure was repeated with the addition of a 4.75-kHz suppressor at 50 or 60 dB SPL, gated with the masker. Tuning curves were broader, and estimates of compression and gain from derived input/output functions were decreased in the presence of a suppressor as compared to the no-suppressor condition. The results are consistent with physiological results, which show that suppression leads to a broadening of tuning curves and a partial linearization of the midlevel portion of the basilar-membrane input/output function. © 2003 Acoustical Society of America.
| Original language | English |
|---|---|
| Pages (from-to) | 322-332 |
| Number of pages | 10 |
| Journal | Journal of the Acoustical Society of America |
| Volume | 114 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jul 2003 |
Keywords
- Acoustic Stimulation
- Adult
- physiology: Attention
- physiology: Auditory Threshold
- physiology: Basilar Membrane
- Humans
- Linear Models
- physiology: Loudness Perception
- physiology: Perceptual Masking
- physiology: Pitch Discrimination
- Psychoacoustics
- Sound Spectrography
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Manchester Centre for Audiology and Deafness (ManCAD)
Munro, K. (PI), Millman, R. (PI), Lamb, W. (Support team), Dawes, P. (PI), Plack, C. (PI), Stone, M. (PI), Kluk-De Kort, K. (PI), Moore, D. (PI), Morton, C. (PI), Prendergast, G. (PI), Couth, S. (PI), Schlittenlacher, J. (PI), Chilton, H. (PI), Visram, A. (Researcher), Dillon, H. (PI), Guest, H. (Researcher), Heinrich, A. (PI), Jackson, I. (Researcher), Littlejohn, J. (Researcher), Jones, L. (PI), Lough, M. (Researcher), Morgan, R. (Researcher), Perugia, E. (Researcher), Roughley, A. (Researcher), Whiston, H. (Researcher), Wright, C. (Support team), Saunders, G. (PI), Kelly, C. (PI), Cross, H. (Researcher), Loughran, M. (Researcher) & Hoseinabadi, R. (PI)
Project: Research