Nissan shows new, lightweight noise-reducing technology Weighing around one-fourth of conventional sound insulation materials, Nissan’s acoustic meta-material delivers both quietness and efficienct. It is 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 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. Making vehicles lighter helps limit the environmental impact of driving by improving energy efficiency. It also enhances enjoyment, as the quiet vehicle cabin makes driving more comfortable.
Lightweight high-isolation material (acoustic meta-material) :
Take a look at this video around 1min in for an English Description !
Nissan Creates Sound Reducing Meta-Material :
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