Styrophone
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A styrophone is an acoustic device made from Styrofoam (expanded polystyrene foam). There are at least two varieties:
- an acoustic musical instrument
- a type of loudspeaker
The musical instrument consists of a Styrofoam box that is forced to vibrate by friction against a wooden stick. Technically, the instrument is a type of friction idiophone. Styrophones tend to last for only one performance, as the friction destroys the material. [1]
The loudspeaker is a cheap home-made variety that consists of a crystal earpiece attached to a cone made from a Styrofoam cup.[2]