Metafoam Technologies Inc.

China Manufacturer with main products: Open-cell metal foams (copper, copper-silver, iron, nickel foams) with the highest surface area and strong capillary force. This material can...

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Metal foam acoustic solution

Update Time: 2008/1/22

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Place of Origin: Qc Brossard in Canada


Acoustical performances of Metafoam's material are outstanding, especially in low frequencies. Actually, no other metal foam, polymer foam or mineral fibers offer similar performances. Tests results show that with a 6 cm thick metal foam, 60% of noise at 300 Hz is dissipated and the absorption coefficient is at least 80% for frequencies higher than 500 Hz. For a 2,4 cm thick sample, the absorption coefficient is still higher than 80% at more than 1500 Hz. Furthermore, we demonstrated that transmission losses are more important with a 10 mm thick metal foam than with a 50 mm thick conventional polymer foam. Metafoam's material shows great acoustical properties and has many other advantages over polymer and mineral foams: it is stiffer (higher Young's modulus) and thus has interesting structural characteristics; contrarily to mineral whool, metal foam eliminates fiberizing problem; it resists to high temperatures (>1000°C) and humidity which allows it to keep its acoustical properties for a longer time than conventional polymer and mineral foams; it absorbs energy efficiently and then increases security in case of a pedestrian impact. Metafoam has been selected as a subcontractor for a project led by an European car manufacturer to attenuate engines noise.

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