Nissan Develops Lightweight Acoustic Meta-material to Reduce Exterior Noise

The meta-material has a lattice structure and is not inferior in noise cancellation efficiency to traditional materials.

Vibration and noise insulation of cars has long been an issue that engineers of many companies are working to solve. Even with the distribution of electric cars that almost do not produce noise while driving, the problem is still relevant. Nissan’s specialists seem to have found a solution.

Nissan Develops Lightweight Acoustic Meta-material to Reduce Exterior Noise photo 2

Currently, manufactures use rubber boards to reduce exterior noise. They do reduce noise and vibration but also reduce energy efficiency, having a considerable weight. This has led a number of companies, including Hyundai and Bose, to solve this problem by adapting active noise reduction technology, like the one used in headphones, in an attempt to cancel out sound waves.

Nissan claims that the developed acoustic meta-material is as effective as other widely-used acoustic components but it is a quarter lighter. The developers claim that the goal is to produce a cheaper material.

Acoustic material NissanNissan Develops Lightweight Acoustic Meta-material to Reduce Exterior Noise photo 3Nissan Develops Lightweight Acoustic Meta-material to Reduce Exterior Noise photo 4Nissan Develops Lightweight Acoustic Meta-material to Reduce Exterior Noise photo 5

The new acoustic meta-material represents a lattice structure covered with a thin plastic film. The structure helps to reflect and partially absorb sound waves in a wide frequency range from 500 to 1200 hertz.

The new material was shown at CES in Las Vegas. The Nissan Ariya concept is the first car using it. The company has not yet reported when the lattice sound insulation will be used in production cars.

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