ASLP 3030 Exam 3 Review Questions
and Answers 100% Solved | Rated A+
Decibel Scale - ✔✔o Expresses a range of different levels of sound energy
Intensity - ✔✔o Amount of acoustic energy that strikes a given area
(watts/m^2)
How many db IL is a measured intensity of 10^-10? - ✔✔Intensity
measured (Im) = 10^-10
Intensity reference (Ir) = 10^-12
dB IL = 10log (10^-10/10^-12)
10 log (10^-10(-12) OR 10 log (10^2)
10 (2) OR 20dB
How many dB SPL is a measured sound pressure of 25 uPa? - ✔✔dB SPL
= 20log(25/20)
20log (1.25)
20(0.09691)
dB SPL = 1.9
, Root Mean Square RMS Amplitude - ✔✔o Mean amplitude over a given
time period
Psychoacoustics - ✔✔Study of the perception of sound
Percept - ✔✔o Mental representation of the real-world phenomenon
"What the ear drum captures vs. what we think we hear"
Bottom-Up Processing - ✔✔o Refers to processing sensory information as
it is coming in
Top-Down Processing - ✔✔o Refers to processing sensory information as
it is coming in
Threshold - ✔✔o Used to identify a driving line between two "states"
Absolute Threshold - ✔✔o Minimum stimulation needed to register a
particular stimulus 50% of the time
Threshold of Pain - ✔✔o Threshold at which a stimulus is perceived as
painful
Difference Threshold - ✔✔o Amount by which one stimulus must be
different from another person to notice that the two stimuli are different
o Just noticeable difference (JND)
Limen - ✔✔o A threshold below which a stimulus is not perceived or is not
distinguished from another
and Answers 100% Solved | Rated A+
Decibel Scale - ✔✔o Expresses a range of different levels of sound energy
Intensity - ✔✔o Amount of acoustic energy that strikes a given area
(watts/m^2)
How many db IL is a measured intensity of 10^-10? - ✔✔Intensity
measured (Im) = 10^-10
Intensity reference (Ir) = 10^-12
dB IL = 10log (10^-10/10^-12)
10 log (10^-10(-12) OR 10 log (10^2)
10 (2) OR 20dB
How many dB SPL is a measured sound pressure of 25 uPa? - ✔✔dB SPL
= 20log(25/20)
20log (1.25)
20(0.09691)
dB SPL = 1.9
, Root Mean Square RMS Amplitude - ✔✔o Mean amplitude over a given
time period
Psychoacoustics - ✔✔Study of the perception of sound
Percept - ✔✔o Mental representation of the real-world phenomenon
"What the ear drum captures vs. what we think we hear"
Bottom-Up Processing - ✔✔o Refers to processing sensory information as
it is coming in
Top-Down Processing - ✔✔o Refers to processing sensory information as
it is coming in
Threshold - ✔✔o Used to identify a driving line between two "states"
Absolute Threshold - ✔✔o Minimum stimulation needed to register a
particular stimulus 50% of the time
Threshold of Pain - ✔✔o Threshold at which a stimulus is perceived as
painful
Difference Threshold - ✔✔o Amount by which one stimulus must be
different from another person to notice that the two stimuli are different
o Just noticeable difference (JND)
Limen - ✔✔o A threshold below which a stimulus is not perceived or is not
distinguished from another
