Psychoacoustics Exam 1
psychoacoustics is the study of relationships between the __________ of a stimuli and
_________ of them - ANS - physical characteristics; our psychological experience
psychoacoustics is a subset
...
Psychoacoustics Exam 1
psychoacoustics is the study of relationships between the __________ of a stimuli and
_________ of them - ANS - physical characteristics; our psychological experience
psychoacoustics is a subset of ______ - ANS - psychophysics
the study of relationships between the physical characteristics of a stimuli and our psychological
experience of them - ANS - psychoacoustics
the general physical phenomenon of sound - ANS - acoustics
main physical characteristics of acoustic stimuli (4): - ANS - -intensity
-frequency
-duration
-spectral complexity
the perceptual correlate associated with:
a) intensity
b) frequency
c) spectral/signal complexity
d) duration - ANS - a) loudness
b) pitch
c) timbre
d) perceived duration
psychoacoustics is used in: - ANS - -audiology
-audio engineering
-speech synthesis
-telephone and stereo design
-hearing aid design
-basic, applied, and translational science
levels of perception from easiest to hardest: - ANS - -detection
-discrimination
-identification
-comprehension
often the absolute threshold, or the lowest level of sound that elicits a detection response - ANS -
detection
the just noticeable difference between sounds - ANS - discrimination
usually measures percent correct - ANS - identification
psychophysical testing involves: - ANS - -perceptual thresholds
-psychophysical scales
difference threshold - ANS - the minimum difference in two stimuli that a subject can detect
50% of the time
absolute threshold - ANS - the minimum stimulation needed to detect a stimulus 50% of the time
why are psychoacoustic measurements far more complex than acoustic measurements? - ANS - -
varies from person to person
-it is dealing with human perception
-it is not a 1 to 1 correspondence
perceptual threshold - ANS - the point at which the intensity level of a stimulus is just large
enough to cause a change in the mental response of a stimulus
three types of perceptual thresholds: - ANS - -absolute threshold
-terminal threshold
-difference threshold
psychophysical scale - ANS - relates the strength of a sensation to the strength of the physical
stimulus which caused the sensation
an example of a psychophysical scale is a ________ - ANS - -loudness scale
-pitch scale
an example of a perceptual threshold is a _______ - ANS - hearing threshold
detection threshold - ANS - the lowest intensity of a stimulus that can be detected a specific
percentage of times, usually 50%
an absolute threshold can be either: - ANS - -a detection (sensory) threshold
-a recognition (cognitive) threshold
difference threshold - ANS - the smallest physical difference between two stimuli in which a
listener can determine that two stimuli are perceptually different
example of difference threshold - ANS - the smallest noticeable difference in pitch
recognition threshold - ANS - the lowest intensity of a stimulus at which the stimulus can be
recognized a specific percentage of the time, usually 50%
terminal threshold - ANS - the maximum value of stimulus that elicits a given response
3 classical psychophysical methods: - ANS - -method of limits
-method of constant (random) stimuli
-method of adjustment
in the _______, the stimulus is under the investigator's control and the subject simply responds
after each presentation - ANS - method of limits
the following are response biases associated with the method of limits, except for (2):
a) habituation
b) anticipation
c) persistence
d) perseveration - ANS - c & d
the subject may anticipate the level at which his respo
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