Quick Answer: The Sound kit is an acoustics apparatus set for showing how sound is produced, why it needs a medium, how it reflects and how resonance works. It includes a 440 Hz tuning fork pair on wooden resonance boxes and a vacuum bell jar with an electronic beeper.
Last updated: October 2026
Key Features
Matched tuning fork pair, 440 Hz, with wooden resonance boxes
Vacuum bell jar with an electronic beeper and flange sealing rings
Sound reflection protractor base with two guidance tubes
Variable-volume water-column resonance tube graduated in mm
Compact sonometer board with tension keys and stainless steel test wires
Electronic digital pulse counter for speed-of-sound work
Nickel-plated steel, cast iron bases, acrylic resonators, sound-reflecting panels
Packed weight
5.80 kg, foam-padded carrying case
About This Product
A struck tuning fork that knocks away a pith ball on a thread shows that sound comes from a vibrating object. With the beeper inside the bell jar, the sound fades as a laboratory vacuum pump draws out the air, showing that sound needs a medium. The reflection base, resonance tube and sonometer then take the class on to the law of reflection of sound, resonance and frequency.
Frequently Asked Questions
Does the Sound kit include a vacuum pump?
The bell jar connects to a standard laboratory vacuum pump through its base flange nozzle; a pump is not listed among the included parts.
