1|Page
ARDMS SPI EXAM 2025/2026 LATEST REAL EXAM
QUESTIONS AND 100%CORRECT DETAILED
ANSWERS|ALREADY GRADED A+
Max of min deviation of an acoustic variable from the
average value of that variable - ANSWER-amplitude
Units of pressure amplitude - ANSWER-Pascal
The rate at which work is performed - ANSWER-power
How are power and amplitude proportioned - ANSWER-
power = amplitude squared
Intensity formula - ANSWER-power / area (w/cm^2)
Resistance to the propagation of sound through a medium
- ANSWER-impedance
Units for impedance - ANSWER-rayls
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If there is a small impedance mismatch - ANSWER-a.
There will be a small reflection
Which property of sound is measured in Rayls?
A. Intensity
B. Impedance
C. Density
D. Propagation speed - ANSWER-b. Impedance
If sound energy is reduced by 50%, how many decibels
were lost?
A. 6db
B. 3db
C. 0db
10db - ANSWER-B 3db
ARDMS SPI EXAM 2025/2026 LATEST REAL EXAM
QUESTIONS AND 100%CORRECT DETAILED
ANSWERS|ALREADY GRADED A+
Max of min deviation of an acoustic variable from the
average value of that variable - ANSWER-amplitude
Units of pressure amplitude - ANSWER-Pascal
The rate at which work is performed - ANSWER-power
How are power and amplitude proportioned - ANSWER-
power = amplitude squared
Intensity formula - ANSWER-power / area (w/cm^2)
Resistance to the propagation of sound through a medium
- ANSWER-impedance
Units for impedance - ANSWER-rayls
, 2|Page
If there is a small impedance mismatch - ANSWER-a.
There will be a small reflection
Which property of sound is measured in Rayls?
A. Intensity
B. Impedance
C. Density
D. Propagation speed - ANSWER-b. Impedance
If sound energy is reduced by 50%, how many decibels
were lost?
A. 6db
B. 3db
C. 0db
10db - ANSWER-B 3db
