metamaterials
"THERE IS PLENTY OF ROOM AT THE BOTTOM"
Whereas natural materials derive their properties from chemical constituents, metamaterials achieve their properties by finely constructed tiny artificial structures. This idea of “artificial atoms” brings unprecedented degrees of freedom. It can not only simulate one material by a different substrate but even realise some material properties that do not exist in nature. A new materials engineering paradigm was therefore born. Starting from the target properties, one can directly reverse design the corresponding tiny “artificial atoms” to achieve optimal performance under limited conditions.
DO LESS, GET MORE
AMG’s acoustic metamaterial technology can achieve broadband sound absorption similar to or even beyond traditional acoustic sponges by simply modifying the structure of solid surfaces such as plastic or metal. This simple geometric modification does not require introducing new components, so other properties of the material, such as mechanical strength, heat resistance, corrosion resistance, etc., can be kept unchanged.
APPROACH THE PHYSICAL LIMIT
Our physical findings point to a universal upper limit on the acoustic absorption properties of any material/structure. And AMG’s broadband metamaterial absorption technology ensures that the results are close to the limit performance through a proprietary design algorithm so as to achieve the most optimal acoustic material.
DESIGN AS YOU NEED
A typical design of ours generally contains tens to hundreds of independent units, thus providing enough freedom to customise the spectrum according to different needs in broadband. Moreover, such fully customised designs often have significant performance advantages over traditional general solutions in specific applications (such as mechanical noise with a particular spectrum, aerodynamic noise, etc.).
At the same time, since the performance of AMG metamaterials comes entirely from the structure rather than the substrate, we can choose different materials according to specific application needs. For example, metals or ceramics can be used at high temperatures; antibacterial plastics can be used in high clean environments, etc.
kef story
ABSORPTION IN LOUDSPEAKER
The speaker’s sound comes from its vibrating diaphragm. But the sound at its two sides is always interference cancelled by each other in the far-field. Therefore, blocking and absorbing the sound of one side through a rear cavity becomes necessary to improve the speaker’s performance, and the cavity’s absorption spectrum will significantly affect the quality and characteristics of the speaker.
ACOUSTIC METAMATERIALS IN KEF
As a UK-based hi-fi company, KEF aims to continuously design and optimise better speakers for the most effective sound reproduction. Its unique Uni-Q driver unit has precise and detailed requirements for the acoustic absorption performance of the rear cavity at each frequency. Therefore, according to the needs of KEF, AMG specially customised a disk-shaped acoustic absorption metamaterial with a maze structure for its drive unit, which absorbs 99% of the unwanted sound.
we got all the goods
ENJOY THE SILENCE
Maze-like structure gives an effective noise absorption to cancel the unwanted noise in any form. HVAC is one of our successful project which its insertion loss at measured flow is 26 dBA, meanwhile maintaining the function of ventilation.
Light but strong
Metamaterials come with hollow and Honeycomb-like structure which provide a light, high strength support to reduce the tensile failure and a high thermal insulation.
MULTIFARIOUS
As the technology is based on simple geometric modification, any materials can be used without affecting the acoustic performance. Materials and colour can be fully customised base on your needs.
BREAK WITH TRADITION
Traditional material such as glass wool and sponge can accumulate dusts and irritate the eyes, skin, and the respiratory system. Such traditional materials are unable to be washed and need to be changed to maintain the performance. However, metamaterials isn’t just solve the problem of cleaning and harmful impacts, but also its acoustic performance surpass the traditional material.