Sound WavesA series of free High School Physics Video Lessons from Brightstorm online Physics series.
Sound Waves Sound waves are waves transmitted through the air or even through liquids or solids which change the pressure of that substance enough that our ears can perceive them. The pitches of sounds we hear depend on varying frequencies of these waves.
Standing Sound Waves The standing sound waves are known as harmonics that involved sound. Standing sound waves associate with the boundary conditions at the boundaries of the medium. When the traveling wave is reflected back into the medium, energy stands in the way. The two boundary positions are open boundary condition in which the air is open and closed boundary in which the air is blocked from the surrounding. The position of standing waves varies accordingly to the boundary conditions, pressure, and displacement.
Wave Intensity Wave intensity is the average power that travels through a given area as the wave travels through space. The intensity of sound waves is measured using the decibel scale.
Decibel Scale The decibel scale is used to measure the intensity of sound waves. A wave with an intensity of 0 decibels is impossible to hear. Normal speech, on the other hand, has an intensity of 60 decibels.
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