Sound Waves Essay

Sound Waves Essay

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What is a sound wave? A sound wave is produced by a mechanical vibration, such as a tuning fork. The vibrating object causes the surrounding medium, such as air, to vibrate as well.The wave travels through the medium to a detector, like your ear, and it is heard.As with any type of wave, a sound wave is also described by it's wavelength, amplitude, period, and frequency.

WAVELENGTH is the distance from one point on the wave,
to the next identical point, or the length of one part of the wave.

AMPLITUDE is the distance from the midpoint to the place of maximum displacement.

FREQUENCY is the number of cycles that occur in one second.
It is also the inverse of the period.

PERIOD is the time it takes for a wave to complete one full cycle.
It is also the inverse of frequency.

Sound waves are longitudinal waves that consist of high and low pressure areas called condensations and rarefactions, respectively. Since sound waves are longitudinal waves, the particles of the medium oscillate parallel to the velocity of the wave. The individual particles do not travel along the wave. They only oscillate back and forth and the wave still propagates through them.

The speed of sound depends on the type of medium that the wave is traveling through. In air, the speed of sound is about 340 m/s or 760 mph for a normal spring day. The speed also depends on the temperature of the medium.

The formula used to figure out the speed of sound, in air, on any given day is;
v = 331 m/s + 0.6T
where v is the velocity of the wave, T is the temperature of the air in degrees celcius, 331 m/s is the speed of sound at 0°C, and 0.6 is just a constant. So as the temperature increases, so does the speed o...


... middle of paper ...


...99.

Health Issue of the Month: Middle Ear Infection. March 1999. 12 Apr. 2003. Sight and Hearing
Association.

Hecht, Eugene. Physics: Algebra / Trig. 2nd ed. Brooks/Cole, 1998.

Henderson, Tom. Sound Waves and the Eardrum. 17 Aug 1998. 10 Apr 2003.


Kurtus, Ron. Sound Waves. 18 Feb 2002. 10 Apr 2003.


Russel, Dr. Dan. Longitudinal and Transverse Wave Motion. 12 Apr 2003.


Serway, Raymond A. and Robert J Beichner. Physics for Scientists and Engineers. 5th ed.
Brooks/Cole, 2000.

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