Final answer:
Musical instruments use 'boxes' to enhance and project sound. Acoustic guitars and pianos use hollow bodies as boxes to amplify the sound. Xylophones use resonators as boxes to amplify and sustain the sound produced by the bars.
Step-by-step explanation:
Many musical instruments use 'boxes' as part of the instrument. These boxes, also known as the body or resonant chamber, play a crucial role in enhancing and projecting the sound produced by the instrument. For example, in the case of an acoustic guitar, the hollow body of the guitar helps to amplify the vibrations of the strings, resulting in a louder and richer sound. Similarly, a piano's soundboard, which is a large wooden box, amplifies the vibrations created by the hammers hitting the strings, producing a vibrant and resonant sound.
A xylophone, on the other hand, uses a wooden box called the resonator underneath the wooden bars. The resonator helps to amplify and sustain the sound produced by the bars when struck. It acts as a kind of echo chamber, allowing the sound to resonate and reverberate, giving the xylophone its distinct tone and projection.
Learn more about the purpose of 'boxes' in musical instruments