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Sound & Waves
Savart’s Tone Wheel Alloy STEM Apparatus, 10 mm and 6 mm Diameter
AUD 109.90(Ex GST)
AUD 109.90(Ex GST)
- Four toothed metal discs on shaft, about 73 mm diameter, rotate to generate tones in acoustics lessons.
- Stiff card pressed to wheel edge, teeth strike card, produces audible tone linked to tooth count.
- Tooth counts 36, 45, 54, 72, represent ratio 4:5:6:8 for frequency relationship teaching.
- Sound all four discs together, combined tones form natural chord, demonstrates musical intervals.
- STEM demonstrator for tone, frequency ratios, harmonics, and auditory comparison without electronics.
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- Description
Description
Savart’s tone wheel apparatus is a STEM acoustics demonstrator that generates audible tones using toothed metal discs. The set consists of four metal discs about 73 mm diameter mounted on a central shaft so the discs can be rotated. Each disc has a different number of teeth, and when a stiff card is held against the edge of a rotating disc, the teeth produce a clear tone.
The four tooth counts are 36, 45, 54, and 72, forming the ratio 4:5:6:8. When all four discs are sounded together against the stiff card, the combined tones form a natural musical chord, allowing students to explore frequency ratios, harmonics, and tone relationships through direct listening.
FAQs
Q: What is included in the tone wheel set?
A: Four toothed metal discs mounted on a central rotating shaft.
Q: How is sound produced?
A: By holding a stiff card against the edge of a rotating toothed wheel.
Q: What are the tooth counts on the four discs?
A: 36, 45, 54, and 72 teeth.
Q: What ratio do these tooth counts represent?
A: 4:5:6:8.
Q: What happens when all four wheels sound together?
A: The combined tones form a natural musical chord.
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