Musical Instruments

Classical Mechanics Level 1

All stringed musical instruments—like guitar, violin, etc.—have a hollow box behind the strings. (See the sound hole on the hollow box of a guitar, circled red in the picture.)

What purpose does this hollow box serve?

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The strings vibrate the air inside the hollow box to produce a louder sound The hollow box absorbs the sound coming from the strings and thereby produce a low sound To reduce the weight of the musical instrument The hollow box allows the string to vibrate freely