Nissans has built a reputation around its frigid cold air conditioning system, but its absorption of unwanted NVH? Not so much. Well, all that’s going to change thanks to this new breakthrough material developed by the company.
Dubbed “acoustic meta-material,” it’s a simple yet ingenious material. A combination of a lattice structure and plastic film controls air vibrations to limit the transmission of wide frequency band noise (500-1200 hertz), such as road and engine noise.
Currently, most materials used to isolate this frequency band consist mainly of heavy rubber board. Nissan’s new acoustic meta-material weighs one-fourth as much as these while providing the same degree of sound isolation.
Because of its simple structure, the material’s cost competitiveness in terms of mass production is almost the same as, or possibly better than, current materials. Therefore, the material can also be applied to vehicles where the use of sound insulation materials is currently limited due to cost or weight.
Nissan started its research on meta-material technology around 2008. At the time, meta-material was used in high-sensitivity antennas used for electromagnetic wave research. Nissan worked to extend the applicability of meta-material technology to include sound waves, leading to the successful invention of acoustic meta-material.
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