RP 33 Ch.10-Ch.12
Sonar Science Quiz
Test your knowledge of sonar principles with this engaging quiz! This quiz covers key concepts from RP 33, Chapters 10 to 12, providing an opportunity to enhance your understanding of sonar technology.
Whether you're a student, educator, or just a curious mind, you'll find value in these challenging questions:
- Active sonar equations
- Signal-to-background-noise ratio
- Sound attenuation
- Electromagnetic energy in water
Select the active sonar equation.
SE = SL + TS - RD - LE - 2PL
SE = SL + TS + RD - LE - PL
SE = SL - TS - RD - LE - 2PL
SE = SL + TS + RD + LE + 2PL
_______ is defined as the signal-to- background-noise ratio required at the sonar reciever to enable an operator to recognize the presence of a signal 50% of the time.
Signal excess
Source level
Recognition differential
Target strength
The reduction in sound intensity (dB/kyd) caused by the absorption and scattering of sound in water is known as ________.
Afternoon effect
Attenuation
Band level
Bottom interaction
_____ is a form of electromagnetic energy that is selectively absorbed in water according to its color and wavelength.
X-ray
Sound
Light
Wavelength
The intensity of bioluminescence is less in the open ocean than nearshore.
True
False
The depth in the water at which a refracted sound ray becomes horizontal is known as ______.
Turbulence
Vertex sound speed
Vertex depth
Turbulent depth
The grazing angle of a sound wave with the sea bottom at which total relfection occurs is known as _______.
Critical depth
Correlation
Critical angle
Continental slope
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