RP 33 Ch.7-Ch.9
Explore the Depths: Sound in the Ocean
Test your knowledge on the fascinating aspects of sound propagation in deep ocean areas with our engaging quiz! Dive into questions covering variables that affect sound speed, acoustic mechanisms, and sonar detection techniques.
- 10 multiple choice questions
- Understand key concepts in underwater acoustics
- Great for students and enthusiasts alike
______ is the dominant variable effecting the speed of sound in deep-ocean areas.
Pressure
Depth
Temperature
Salinity
The intensity of sound within a shadow zone increases exponentially with the distance from the limiting ray.
True
False
At low frequencies, _____ within the bottom is the predominant mechanism for returning energy.
Refraction
Reflection
Deflection
Compression
In shallow water, ______ can become a very important acoustic factor affecting USW.
Temperature
Pressure
Salinity
Volume
The effect of biological activity on overall ambient noise level is more pronounced in shallow coastal waters than it is in deep ocean.
True
False
Both ___ & _____ must be located in the negative sound speed gradient below the SLD for topographic noise stripping to occur.
Medium & source
Source & receiver
Receiver & medium
Medium & detector
____ sensors determine the acoustic environment.
Active
Passive
Select the passive sonar equation.
SE = SL - PL - LE - RD
SL = SE - RD - LE - PL
SE = SL - PL - LE - 2RD
SE = SL - PL - LE + RD
The _____ level for target-radiated noise is the acoustic intensity reduced to a reference distance of 1 yard from the point from which the sound appears to be radiated.
Detection
Medium
Source
Ambient
In passive sonar detection and tracking, the sensor receives a signal generated by the ______.
Detector
Target
Source
Operator
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