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Terms in this set (19)
Solutions to PCT Problems
No good solution to the problem of task difficulty.
Beats can be avoided by use of ______.
Off-frequency listening can be reduced by the use of _______ above and below the signal frequency.
Better fitting procedures can be used.
Narrowband noise maskers
low-level noise bands
When people in psychoacoustics talk about measuring auditory filters, they are generally referring to this method
Obtain threshold for tonal signal in presence of two bands of noise.
Use of noise bands on both sides of the signal avoids problems of beats and off-frequency listening by.
Signal threshold indicates amount of noise entering the filter centered on the signal.
_____ used a technique to determine the shape of the auditory filter. The threshold of the sinusoidal signal is measured as a function of the width of the spectral notch in the noise masker. The amount of noise passing through the auditory filter centered at the signal frequency is proportional to the shaded areas.
Deriving the filter shape from data...
Thresholds for different ____ represent the area under the filter, not the shape of the filter.
Patterson found a shape formula that worked well and called it ____ _____ or ____ ____.
Problems with the Notched-Noise Method
The ___ ____ does not provide a simple measure of ______ .
Filter shapes change with ____ because the peripheral auditory system is ____ .
______ is determined by the signal level at its output, which is not how any real filter works. Rosen, Baker and Darling (1998).
Glasberg and Moore (1990, 2000) provided solutions to these problems.
Other Phenomena ...
Sensitivity to phase:
At low modulation rates, __ and __ tones have similar spectra, a carrier tone and side bands at + and - the modulation freq.
For AM, they are all in phase.
For FM, the carrier is 90 degrees out of phase. 3-component approximation is called quasi-FM or QFM.
In general, subjects can tell the difference between AM and QFM only when the 3 spectral components fall within the same ______.
The ear is not sensitive to the phase of ______.
Components of complex tones in different critical bands are processed individually.
_______ provides a measure of the width of the critical band.
Subjects may be using ____ rather than frequency analysis
What acoustical law says that the ear does a true Fourier analysis and that people can therefore hear the pitches corresponding to the individual sinusoidal components of a complex sound.
Who determined the limits of our ability to hear the 1st 12 harmonics of a sound, for conditions where the fundamental was 125 Hz to 2000 Hz.
Plomp says the ear acts as a _____.
We use ____ or ____ filters as a model when describing auditory frequency selectivity.
Many different stimulus configurations or masking paradigms show effects of ____.
The various measures are in general agreement regarding _____ as a function of frequency.
Limitations of the Filter Model
Filters are ___, but the peripheral auditory system is not.
The ERBN equation ignores ____ .
The notched-noise method of establishing filter shape and width is based on the ______ of masking, which does not hold in all cases.
power spectrum model
show the effect of a single narrowband masker across a range of frequencies.
Who has argued that masking patterns underestimate the amount of masking.
Developed by Moore and Glasberg (1983, 1987) to show the effect of a single narrowband masker across a range of frequencies.
Can be considered as a model of masking patterns based on data obtained in notched-noise filter studies.
Intended to provide a summary of what would occur in a masking-pattern experiment in the absence of off-frequency listening.
____ are intended to provide a truer picture of the spread of masking than masking patterns.
THIS SET IS OFTEN IN FOLDERS WITH...
Psychoacoustics- Theories of Hearing
Psycho- Measurement 2
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