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# The Physics of Ultrasound Essay Example

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## The Physics of Ultrasound

That the stone released in the water gets transported outward, which may eventually reach the shore or some floating particles if the energy released is strong. However, if the energy is weak, the waves would dissipate quickly. In a way, the force used in throwing the stone into the water increases, the distance that the ripples could travel also increases relatively. Thus, the stronger the waves are from the beginning, the longer and the further they could travel from the point of origin (Gill 7).Sound waves have other characteristics, aside from strength or energy which could dictate the distance that can be traveled, as well as the strength of the wave. The height of the wave or amplitude is able to dictate whether the wave has a large amount of strength, or if it is weak (Gibbs 7). Waves that have high amplitudes are said to be loud, while those with low amplitudes are said to be higher in pitch. While ultrasound is barely audible, it does not necessarily mean that it is weak, as another factor called frequency also dictates the strength of the wave. Frequency is a property of waves, also known as cycles, which dictates how many waves are produced at any given second. Thus, the higher the frequency of the waves, the greater is the capacity to penetrate objects, and in turn the greater the energy of the waves (Gill 7). In the case of ultrasound waves, the range of the frequencies is between 2 MHz to 15 MHz, which has a thousand times more cycles than the normal audible levels of humans, thus having much more penetrating power than normal sound waves (7).Waves are capable of moving repeatedly, or oscillating from one place to another in a singular direction, and back again, or if the waves are rather weak, could get smaller and smaller as the distance they travel becomes longer, also called attenuation (Gill 8). Waves can also become compressed, depending on what surfaces that are present in the surrounding areas. When particles within adjoining locations started to move toward each other, the region is said to be undergoing compression, thus the pressure in the region increases, and in a similar manner, if the particles move apart within the same region, there is said to have a decrease in pressure, thus the region undergoes a phenomenon called rarefaction (Hoskins 4). At each point in the region or the medium, the sound waves become either compressed or expanded, depending on whetherWhen sound waves travel, disturbances such as different

Works Cited

Gibbs, Vivien, David Cole and Antonio Sassano. Ultrasound Physics and Technology: How, Why and When. London: Elsevier, 2009. Print.

Gill, Robert. The Physics and Technology of Diagnostic Ultrasound: A Practitioners Guide. Sydney: High Frequency Publishing, 2012. Print.

Hoskins, Peter R., Kevin Martin and Abigail Thrush. Diagnostic Ultrasound: Physics and Equipment. Cambridge: Cambridge University Press, 2010. Print.

Tole, Nimrod M. and Harald Ostensen. Basic Physics of Ultrasonographic Imaging. Geneva: World Health Organization, 2005. Print.

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