Final answer:
Musicians manipulate sound through resonance in instruments, such as air columns in wind instruments, sounding boxes in string instruments, and gourds in marimbas, which amplify and shape tones for expressive results.
Step-by-step explanation:
The question pertains to the mechanisms by which musicians manipulate sound to produce musically expressive results. Performers can use various aspects of their instruments, such as the resonance of air columns in wind instruments, to amplify and shape the tones produced.
Instruments like the violin and guitar have sounding boxes that resonate with the vibrating strings, enhancing the sound and adding characteristic overtones. Similarly, the marimba uses pots or gourds to amplify the sound, with the option to adjust the resonance by adding water. These structures allow performers to create rich and complex tones across a wide range of frequencies.