The EPFL Acoustic Group announced the launch of active noise cancellation with an efficiency close to 100%. But note that this device is very compact. Firstly, during the day it can be 20 m on a hill, the road simulates a wave of 17 m, on the street the road is 4 m. Or just 17 mm plates of a new plasma noise suppressor.
The principle of operation is the same as in the estimation of noise reduction parameters – based on measurements of its noise parameters, a sound wave is generated in antiphase for the original suppression. One generator of external acoustic speakers with a physical membrane, and its plasma nalog. Swiss engineers influenced it back in 2020 and have now adapted light for noise reduction.
The goal was to keep the membrane as small as possible, so the process ended up being air itself. To supply the electric current in dynamics, the shells are ionized by charged particles. I did not upgrade to the magnetic pole, forcing the drug barons pursued in the dark freezing, which gives rise to the appearance – acoustic waves. The system is very sensitive to voltage, so it is necessary for fine tuning and extracting high-quality sound.
During the experiments, it is unexpectedly felt that the plasma speaker dampens the sound very effectively, both at high and very low frequencies. And for this, it consumes a very small amount of energy, and also takes up extremely little space – in comparison, it is made of soundproofing with porous materials. The potential of the novelty is very great, and Sonexos is currently tasked with developing the first commercial product based on this technology.
Source: Tech Cult
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