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This is a pulsing sound as the result of interference of sound waves of slightly different frequencies
the bending downward of sound waves as they move into a layer of cool air is an example of
THe lower limit of sound intensity is called the threshold of ____
hearing which is 1.0 X 10^-12 w/m^2 at 1000 Hz
Compared to speed of light, sound is much ____ and compared to energy of light, sound is much _____
change in pitch of a sound as the source and observer move towards or away from ech other is __
doppler effect, used for tracking storms and car speed direction
____ occurs when an outside force matches the ___ freq of an object, result is dramatic increase in ___ of waves
resonance, natural, amplitude
____ can be heard when two tuning forks of diff freq are sounded together. this results from constructive and destructive interference of the two sound waves produced
Trailing behind a supersonic plane is a ____ shaped region of compressed air producing a ____ ______
cone, sonic boom
To raise pitch of string instrument you ___
increase tension, increase density, decreased length of string, and diameter decreases
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