Resonance Boxes

DCS Code: 3C55.55 Last Updated: March 27, 2026
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Purpose

Demonstrates acoustic resonance by coupling tuning forks to wooden boxes of matching resonant frequency. Students hear dramatic amplification when a fork matches its box, illustrating how cavity geometry determines resonant frequency.

Four wooden resonance boxes of decreasing size arranged in a row, each with a turned wooden coupling knob on top and an open front face. A tuning fork rests on each box.
Figure 1: Four resonance boxes with matching tuning forks. Each box has a wooden coupling knob on top and an open front for sound projection.