If a vibration is made to happen at a natural oscillating frequency of an object,
this is called:
☐ standing waves
☐ traveling waves
Pianos typically have two or
three strings for each note. That is, when you press a single key, a small
hammer simultaneous strikes two or three strings. T/F: if the strings are
slightly out of tune with respect to each other, unwanted beats can form in the
pitch when you play the note.
A flute and a clarinet both play the
same note. Two microphones record the sound wave oscillations. T/F: If the
oscillations picked up by the microphones are graphed, the two graphs will look
Ralph is confused by the difference between standing waves and beats, because
they are both caused by interference of waves. Help Ralph understand when
interference will produce one rather than the other.
Standing waves are caused by two waves of the same frequency that are traveling in opposite directions. Beats are caused by two waves with slightly different frequencies, traveling in the same direction.
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