Free Essays, Term Papers, Research Papers at Anti Essays

Human ear is capable of hearing sounds with frequencies of about 30Hz – 20 kHz. Sound waves are able to travel best through rigid solids rather than through liquids and gases. However, human ears have got accustomed to sound waves passing through air, so are able to hear various things. The loudness of the sound is based on the incoming waves’ amplitude whereas the pitch of the sound is based on the incoming waves’ frequency. Musical instruments work by building up regular vibrations like in the case of strings, skins, tubes of air which results in the surrounding air vibrating with the same pattern causing melodious music.
Analysis: Usually sound is absorbed by various objects. However, in some cases, it is reflected which more commonly called as echo. When sound strikes soft materials, it is absorbed. Such materials that absorb most of the energy of sound waves are called sound insulators. This property of the sound is beneficial to geologists to locate oil reservoirs. It also helps in tracking earthquakes and to find out how earthquakes travel through different kinds of rocks and magma.



Enter Your Term Paper Topic Below:

Search For Your Essay At MONSTER ESSAYS!




Ultrasonic waves are those sound waves which are of every high frequency with short wavelengths. Though human ear cannot feel or recognize it, it has many uses. Sonar which is an acronym for Sound Navigation Ranging is used to find the depth of underwater as well as for oceanic explorations. The sonar devices are capable of sending short pulses of ultrasonic waves through the water. When these waves collide with the sea floor, some of them are absorbed. However, some of the waves are reflected back to the ship in the form of an echo which is detected through receivers helping researchers to get information like the exact depth of the ocean, etc. It is also used for military purposes especially in...