Sources of Noise
Due to increase in trade activities between nations, this is a primary contributor for marine noise pollution.
What is Commercial shipping?
This is used in the area of pile driving to reduce noise
What is air bubble curtain?
These are specialized microphones designed to detect and measure sound pressure levels underwater.
What are hydrophones?
This term describes tendency of an object to float or to rise in a fluid when submerged.
What is buoyancy?
This unit is used to measure sound intensity
what is decibel?
Military activities uses this technology to detect enemy ships
What are sonar waves?
Reducing speed of vessels can reduce or eliminate this
What is Cavitation?
A mother ship is used to launch and recover this type of submarine
What is submersible?
This term describes loss of intensity of sound as it travels through different medium
What is attenuation?
The frequency of sound is measured in this unit
What is hertz?
The installation and operation of these energy sources can generate significant amounts of noise,
What is Wind energy?
Using this instead of thrusters can reduce noise level in smaller vessels
What is pump-jet?
This Organization in US studies impacts of marine noise pollution
What is NOAA?
This term is used to describe when background noise makes it difficult for marine animals to hear
What is masking?
Wavelength of sound is measured using unit
What is meters?
used for oil and gas exploration, and offshore construction, generate intense low-frequency noise that can have significant impacts on marine life.
What is seismic survey?
This powers the US Submarine
What are nuclear reactors?
This Organization in Canada studies impacts of marine noise pollution
What is WWF?
This term describes ability to use sound waves to locate objects by listening to echoes they produce
what is echolocation?
Vibration velocity is commonly measured using this unit
What is millimeters per second or inches per second
This process creates bubble and when they burst it can cause continuous noise
What is cavitation?
Submarines are coated with these materials to reduce noise
What are sound dampening materials?
NOAA stands for this
what is National Oceanographic and Atmospheric Administration?
This term describes noise produced by human activities
What is anthropogenic?
This unit used to measure a property of sound is named after a German physicist
What is hertz?