Sensitivity Flashcards
DL =
difference limen
JND =
just noticeable difference
What are hearing thresholds?
The faintest sound you can just hear
MAF =
minimum audible field
MAP =
minimum audible pressure
minimum audible field =
free field (speakers)
minimum audible pressure =
headphones
What is the integration-time model?
the auditory system sums or integrates energy over time
in the integration-time model, if you have less ____ you need more _____
time; energy
in the integration-time model, once ________ exceeds some point, you don’t need extra _____
duration; energy
What is the multiple looks model?
sound is detected in short time windows and each sample is used to make a decision about the presence or absence of the sound
in the multiple-looks model, the ______ the sound the more “____” or the more _________ there is that a sound is ________
longer; looks; evidence; present
in the integration-time model, total energy = _____ X____
power X time
differential sensitivity is detecting an ________ in __________, _______, or ___________
increase; frequency, intensity, or duration
Weber’s Law says that if you can detect 12 Hz increase in a 120 Hz tone, you should just detect a ___ Hz change in a 140 Hz tone
14
in Weber’s law change in s over s is the ________
constant
In Webers law S (the stimulus) can be: (3)
frequency, intensity, duration
What is the frequency discrimination DL?
1-3 Hz at 40 dB
Does frequency discrimination follow Weber’s law?
at mid-frequencies
What is the intensity discrimination DL?
0.5 - 1 dB across a range of frequencies and levels
Does intensity discrimination follow Weber’s law?
no - it is a “near miss”
What is the gap detection threshold?
2-3 ms
Does duration discrimination follow Weber’s law?
No, the JND increases exponentially
