Advantages And Disadvantages Of Sound Waves
What is sound?
Sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.
Humans can hear sound waves with frequencies between about 20 Hz and 20000Hz. Sound above 20000Hz is ultrasound and below 20 Hz is infrasound. Different animal species have varying hearing ranges.
Sound is transmitted through gases, plasma, and liquids as longitudinal waves, also called compression waves. It requires a medium to propagate. Through solids, however, it can be transmitted as both longitudinal waves and transverse waves. Longitudinal sound waves are waves of alternating pressure from the equilibrium pressure, causing regions of compression and rarefaction, while transverse waves are waves of alternating stress at right angle to the direction of propagation.
Properties of sound
Sound waves are often
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Advantages and disadvantages (75%)
Advantages of sonar is that sound navigation and ranging sonar is used to find and identify objects in water. It is also used determine water depth. Sonar is applied to water-based activities because sound waves attenuate less in water as they travel than do radar and light waves. Sonar was first used during World War I to detect submarines. By the 1920s, the U.S. was using it to map deep-water areas. The technology steadily improved, and by World War II, was used once again for military purposes.
The disadvantages of sonar is that sonar waves can interfere with whale and dolphin echolocation. Many marine species, such as whales, depend on sound to find their food, to communicate with their mates and young, and to navigate in the oceans. Imagine a sound so loud traveling such long distances that it can kill or seriously damage sensitive ears and drown out all other sounds. The Navy has pronounced the Sonar system impacts but they don 't really know, because the sound levels produced by Sonar have never been tested on marine life.
Civilian application of sonar
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