A pair of steel tuning forks for demonstrating the beat frequencies mounted on individual boxes. One fork is provided with an adjustable mass by means of which frequency may be shifted from the nominal 426.6Hz. When both forks are sounded a clearly audible ‘beat’ is produced, its rate depending upon the difference in frequency between the forks.
NSW Physics Syllabus Reference
Module 3: Light and Thermodynamics
- Analyse qualitatively and quantitatively the relationships of the wave nature of sound to explain:
- beats 𝑓beat = |𝑓2 − 𝑓1 |
- Conduct investigations to analyse the reflection, diffraction, resonance and superposition of sound waves