ASLP 3030 Exam 2 Study 2025
Questions and Answers
What is decibel scale? - --CORRECT ANSWER--a logarithmic scale
Why do we use a logarithmic scale for a decibel scale?
when intensity ratio doubles, dBs increase by 3 dB; intensity ratio increase by 10,
dB increase by 10 - --CORRECT ANSWER--expressing sound intensity or sound
pressure
The db scale - --CORRECT ANSWER--dB = Px/Pr
db IL scale - --CORRECT ANSWER--denotes a standardized reference (10^-12
watts/m^2).
Reference intensity is always standardized reference. 0dB is the reference intensity.
db SPL scale - --CORRECT ANSWER--intensity = Pressure^2
when pressure ratio doubles, dB increase by 6 dB...reciprocal is true as well.
pressure ratio increases by a power of 10, dB increase by 20...reciprocal is true as
well
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, db HL scale - --CORRECT ANSWER--audiogram
Formula to calculate db IL - --CORRECT ANSWER--dB = 10Log 10 1x/1r;
4:1 > 10Log 10 (4/1) = 6 dB
Formula to calculate db SPL - --CORRECT ANSWER--dB SPL = 20Log 10
Px/Pr; 2:1 > 20Log 10 (2/1) =6 dB
Inverse Square Law - decibels - --CORRECT ANSWER--used to show how sound
propagates
SPLnew = SPLref + (20 × Log rRef/rNew)
each time the distance from a sound source is doubled, SPL increases by 6 dB.
Scientific notation - --CORRECT ANSWER--
Metric prefixes - --CORRECT ANSWER--
How do low pass vs. high pass filters differ? - --CORRECT ANSWER--low-pass
filters pass all frequencies below a particuilar value and high-pass pass all
frequencies above a particular value. All other frequencies haves their amplitudes
attenuated
A low pass filter gets rid of/filters out HIGH frequencies. Everything below a
cutoff frequency is PASSED, everything above is ATTENUATED. Conversely, a
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
Questions and Answers
What is decibel scale? - --CORRECT ANSWER--a logarithmic scale
Why do we use a logarithmic scale for a decibel scale?
when intensity ratio doubles, dBs increase by 3 dB; intensity ratio increase by 10,
dB increase by 10 - --CORRECT ANSWER--expressing sound intensity or sound
pressure
The db scale - --CORRECT ANSWER--dB = Px/Pr
db IL scale - --CORRECT ANSWER--denotes a standardized reference (10^-12
watts/m^2).
Reference intensity is always standardized reference. 0dB is the reference intensity.
db SPL scale - --CORRECT ANSWER--intensity = Pressure^2
when pressure ratio doubles, dB increase by 6 dB...reciprocal is true as well.
pressure ratio increases by a power of 10, dB increase by 20...reciprocal is true as
well
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, db HL scale - --CORRECT ANSWER--audiogram
Formula to calculate db IL - --CORRECT ANSWER--dB = 10Log 10 1x/1r;
4:1 > 10Log 10 (4/1) = 6 dB
Formula to calculate db SPL - --CORRECT ANSWER--dB SPL = 20Log 10
Px/Pr; 2:1 > 20Log 10 (2/1) =6 dB
Inverse Square Law - decibels - --CORRECT ANSWER--used to show how sound
propagates
SPLnew = SPLref + (20 × Log rRef/rNew)
each time the distance from a sound source is doubled, SPL increases by 6 dB.
Scientific notation - --CORRECT ANSWER--
Metric prefixes - --CORRECT ANSWER--
How do low pass vs. high pass filters differ? - --CORRECT ANSWER--low-pass
filters pass all frequencies below a particuilar value and high-pass pass all
frequencies above a particular value. All other frequencies haves their amplitudes
attenuated
A low pass filter gets rid of/filters out HIGH frequencies. Everything below a
cutoff frequency is PASSED, everything above is ATTENUATED. Conversely, a
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
