Journal ArticleDOI
Estimation of the center frequency of the highest modulation filter.
TLDR
The results support the idea that the highest modulation filter has a center frequency in the range 100-120 Hz.Abstract:
For high-frequency sinusoidal carriers, the threshold for detecting sinusoidal amplitude modulation increases when the signal modulation frequency increases above about 120Hz. Using the concept of a modulation filter bank, this effect might be explained by (1) a decreasing sensitivity or greater internal noise for modulation filters with center frequencies above 120Hz; and (2) a limited span of center frequencies of the modulation filters, the top filter being tuned to about 120Hz. The second possibility was tested by measuring modulation masking in forward masking using an 8kHz sinusoidal carrier. The signal modulation frequency was 80, 120, or 180Hz and the masker modulation frequencies covered a range above and below each signal frequency. Four highly trained listeners were tested. For the 80-Hz signal, the signal threshold was usually maximal when the masker frequency equaled the signal frequency. For the 180-Hz signal, the signal threshold was maximal when the masker frequency was below the signal fr...read more
Citations
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Journal ArticleDOI
Forward Masking in the Amplitude-Modulation Domain for Tone Carriers: Psychophysical Results and Physiological Correlates
Magdalena Wojtczak,Paul C. Nelson,Paul C. Nelson,Neal F. Viemeister,Laurel H. Carney,Laurel H. Carney +5 more
TL;DR: Physiological observations suggest that stages of processing higher than the IC must be considered to account for the AM-processing time constants measured perceptually in humans.
Journal ArticleDOI
Modulation masking and glimpsing of natural and vocoded speech during single-talker modulated noise: Effect of the modulation spectrum
TL;DR: Perceptual results combined with acoustic analyses of the preserved glimpses of the target speech suggest contributions of modulation masking and cognitive-linguistic processing as factors contributing to performance.
Journal ArticleDOI
Specificity of the Human Frequency Following Response for Carrier and Modulation Frequency Assessed Using Adaptation
TL;DR: The results are consistent with the suggestion that the FFR for low-frequency pure tones at medium to high levels mainly originates from neurons tuned to higher frequencies, and Implications for the use and interpretation of the F FR are discussed.
Journal ArticleDOI
Modulation cues influence binaural masking-level difference in masking-pattern experiments.
Marc Nitschmann,Jesko L. Verhey +1 more
TL;DR: Simulations with a binaural model indicate that a large portion of the decrease in the BMLD in remote-masking conditions may be due to an additional modulation cue available for monaural detection.
References
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Journal ArticleDOI
Neural processing of amplitude-modulated sounds.
TL;DR: The picture that emerges is that temporal modulations are a critical stimulus attribute that assists us in the detection, discrimination, identification, parsing, and localization of acoustic sources and that this wide-ranging role is reflected in dedicated physiological properties at different anatomical levels.
Journal Article
A model for the prediction of thresholds, loudness, and partial loudness
TL;DR: In this paper, a model for steady sounds is described having the following stages: 1) a fixed filter representing transfer through the outer ear, 2) an excitation pattern from the physical spectrum, 3) transformation of the excitation patterns to a specific loudness pattern, 4) determination of the area under the specific loudeness pattern, 5) determination for a given ear, and 6) summation of loudness across ears.
Journal ArticleDOI
Temporal modulation transfer functions based upon modulation thresholds
TL;DR: Although the TMTFs are not directly consistent with the attenuation characteristic of a simple lowpass filter, a model which incorporates such a filter, with a time constant of 2.5 ms, describes the entire TMTF and also describes the modulation functions obtained with square-wave and pulse modulation.
Journal ArticleDOI
Modeling auditory processing of amplitude modulation I. Detection and masking with narrow-band carriers
TL;DR: A quantitative model for describing data from modulation-detection and modulation-masking experiments is presented, which proposes that the typical low-pass characteristic of the temporal modulation transfer function observed with wide-band noise carriers is not due to "sluggishness" in the auditory system, but can instead be understood in terms of the interaction between modulation filters and the inherent fluctuations in the carrier.
Journal ArticleDOI
Periodicity coding in the inferior colliculus of the cat. I. Neuronal mechanisms
TL;DR: Intrinsic oscillations of short duration, i.e., regularly timed discharges of units in response to stimuli without a corresponding temporal structure, were frequently observed in the ICC and were commonly found to be integer multiples of 0.4 ms.