Resonance AdvancedHardQuestion 31289
Question
In a musical instrument, a string coupled to a resonance box makes louder sound because:
- ABox supplies extra energy
- BResonance box has larger radiating area (forced vibrations enhance energy transfer to air)Correct
- CBox amplifies electronically
- DString vibrates faster
Correct answer
Resonance box has larger radiating area (forced vibrations enhance energy transfer to air)
Explanation
The box (sound board) is set into forced vibrations by the string. Its large surface area displaces much more air per unit time, radiating louder sound. It doesn't add energy — it transfers string energy to air more efficiently.