Masking Flashcards
Masking the the ability of __ _____ to _______ with the ___________ of another
one sound; interfere; perception
Masking is measured by how much the _________ of a _____ __________
threshold; signal increases
Both _____ and ____ can mask tone
noise and tone
Higher threshold means the level must be ________ in order to _____ it
increased; detect
What are two uses for masking?
Clinical Audiometry and research
How is masking used in clinical audiometry?
mask contralateral ear if there is a risk of cross hearing
How is masking used in research?
ability to detect a stimulus in the presence of another informs about the operation of the cochlea
upward spread of masking means that a tone will tend to mask tones _____ it in ________, rather than ____ it
above; frequency; below
What are two factors that can influence the detection of the signal in a masking experiment?
beats, and nonlinearity of the peripheral auditory system
What is beating?
two tones that are close in frequency cause waveform to modulate in amplitude
What is the solution for beating interfering with signal detection when using masking?
using a short duration signal
What does nonlinearity of the peripheral auditory system mean?
aural harmonics and combination tones exists at high signal
What are aural harmonics?
higher harmonics of the signal frequency
What are combination tones?
they occur when signal and masker are simultaneously present
Why is masking asymmetric?
upward spread of masking
White noise masks ___ of many _________
tones; frequencies
What is the signal-to-noise ratio?
ratio of the level of the signal to the level of the noise
Signal to noise ratio is used to describe the _______ threshold
masked
what is the critical band?
width of the auditory filter or peripheral filter
its assumed that the detection of a signal is based on the _____ of an _____ filter centered on the signal ________
output; internal; frequency
masking depends on amount of of masking _____ coming through the _____. “_____ ________ _____”
noise; filter; “Power Spectrum Model”
size (width) of the filter is the _______ ____
critical band
you can estimate the size or critical band of a filter by using the _______ ____ method
notched noise
An equivalent rectangular bandwidth (ERB) is used to:
estimate the size/width of the auditory filter
