One of the major problems of Headphones is the cheap and noisy plastics and the weak ambient noise isolation that contaminates the sound being reproduced by the speaker.
Headphones with systems to cancel this are normally expensive and the results somehow don't reflect the payed price.
In order to bright the best of two worlds is in developing and active noise cancellation the takes active part on the system.
For information: this is not only an phase shift with microphone picking up noise.
The stage is working with long life lithium-sulfur batteries that are charged with an simple adapter when there is need to do. After charged, it disconnects automatically until an certain threshold is reached and reconnected again up to full charge.
Some initial photos: (project on the go)
Further info: valente.olimpia@gmail.com
Eu cá prefiro outro tipo de abordagem. Para mim, quanto menos interferências no sinal melhor, e se for preciso tentar melhorar os materiais, prefiro arriscar nesse sentido.