SoundBug

Soundbug is a small speaker that can turn a resonant flat surface into a flat panel speaker. The Soundbug is attached to a smooth resonant surface. This surface then acts as speaker. The tone differs depending on the surface (wood, metal, glass etc.). The Soundbug was developed by FeONIC Technology (formerly Newlands Scientific), a commercial research and development company specialising in magnetostrictive audio products as a spin-off from Hull University. FeONIC used the same technology for Whispering Windows, which is able to resonate shop windows.

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Soundbug transmits the audio signal to the flat surface by way of a small piece of Terfenol-D, which is a magnetostrictive alloy of rare earth metals and iron. This material, when stimulated with an electrical input, causes the Terfenol to expand slightly, resulting in sound output with a very small amplitude. Once attached to a flat surface, Soundbug will translate electric signals into mechanical energy, causing the flat surface to vibrate and broadcast the sound.

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