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Brian turns up the volume on his stereo. The stereo sends an electrical signal to the speakers. The signal changes the sound's
A sound wave has a frequency of 300 hertz. How many complete wavelengths of this wave pass a fixed point in one second?
Anna plays a note on a clarinet. Fred plays the same pitch on a violin. The two notes sound different. This is because the two notes have different
Sound becomes softer at a distance because the
energy of the sound wave is spread over a greater area, decreasing its intensity
A car's muffler and some kinds of acoustical tile make sounds softer by
absorbing energy from sound waves
If you compare the sound of a motorcycle being driven toward you to the sound of the same one being driven away, you are hearing the
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