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Wave Basics and Sound

 COS6100A OSCILLOSCOPE 100MHZ by altemark on Flickr

Wave- a disturbance that transfers energy from place to place.

Caption: Picture of a sound wave.

Amplitude-  The maximum distance the particles of a medium move away from their rest positions as a wave passes through the medium.

Wavelength-  The distance between the crest of one wave and the crest of the next.

Caption: In this picture, the waves are moving away from each other.

Frequency-  The number of complete waves that pass a given point in a certain amount of time.
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 Phoenix by jurvetson on Flickr

Medium- material through which a wave travels.

Caption:  This is fire and water.  Both are mediums.  The other medium is a solid.
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 Pretty Awesome 3D Metal Wordpress Logo by bobbigmac on Flickr

Mechanical Wave- a wave that requires a medium through which to travel.

Caption:  This sign is metal.  Metal is solid, and solid is a medium.  A mechanical wave needs a medium to pass through.
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 LecciÃ³n 3: Perpendicularidad by NeoGaboX on Flickr

Transverse Wave-  A wave that moves the medium in a direction perpendicular to the direction in which the wave travels.

Caption:  This is a picture of something perpendicular.  As the definition says, a transverse wave moves the medium in a direction perpendicular to the direction in which the wave travels.

Crest- The highest part of a transverse wave.

Trough-  The lowest part of a transverse wave.

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 Inside Sandys by The Daily Ornellas on Flickr

Longitudinal Wave-  A wave that moves the medium parallel to the direction in which the wave travels.

Compression-  The part of a longitudinal wave where the particles of the medium are close together.

Rarefaction-  The part of a longitudinal wave where the particles of the medium are far apart.
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 Coast Guard 47' Motor Lifeboat in Morro Bay, CA 04 Dec 2007 by mikebaird on Flickr

Surface Wave-  A wave that occurs at the surface between two mediums.

Caption:
This is a wave on the surface of the water.
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 My hearing loss explained in graph (January) by lejoe on Flickr

Hertz (Hz)-  Unit of measurement for frequency.

Caption: This is a cart with measures of frequency, or Hertz.
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