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Spectral modulation masking patterns reveal tuning to spectral envelope frequency
- Source :
- The Journal of the Acoustical Society of America. 122(2)
- Publication Year :
- 2007
-
Abstract
- Auditory processing appears to include a series of domain-specific filtering operations that include tuning in the audio-frequency domain, followed by tuning in the temporal modulation domain, and perhaps tuning in the spectral modulation domain. To explore the possibility of tuning in the spectral modulation domain, a masking experiment was designed to measure masking patterns in the spectral modulation domain. Spectral modulation transfer functions (SMTFs) were measured for modulation frequencies from 0.25 to 14 cycles/octave superimposed on noise carriers either one octave (800-1600 Hz, 6400-12,800 Hz) or six octaves wide (200-12,800 Hz). The resulting SMTFs showed maximum sensitivity to modulation between 1 and 3 cycles/octave with reduced sensitivity above and below this region. Masked spectral modulation detection thresholds were measured for masker modulation frequencies of 1, 3, and 5 cycles/octave with a fixed modulation depth of 15 dB. The masking patterns obtained for each masker frequency and carrier band revealed tuning (maximum masking) near the masker frequency, which is consistent with the theory that spectral envelope perception is governed by a series of spectral modulation channels tuned to different spectral modulation frequencies.
- Subjects :
- Masking (art)
Physics
Adult
Acoustics and Ultrasonics
Acoustics
Perceptual Masking
Auditory Threshold
Amplitude modulation
Pitch Discrimination
Noise
Arts and Humanities (miscellaneous)
Acoustic Impedance Tests
Acoustic Stimulation
Hearing
Spectral envelope
Modulation
Reference Values
Octave
Humans
Pitch Perception
Sensitivity (electronics)
Music
Subjects
Details
- ISSN :
- 15208524
- Volume :
- 122
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- The Journal of the Acoustical Society of America
- Accession number :
- edsair.doi.dedup.....1c05fafa9d80e3098b5cc3149fd9da46