Understand: active noise reduction - digital

17/11/2022 By gifsauce 496 Views

But here it is: the more we want significant insulation, and the more insulation thickness must be added;Or alternate layers of different materials depending on scientists to design an insulation sandwich so each thickness plays a different role.And the thickness continues to grow.For our recording studio or our concert hall from the start of the article, no problem, there is room to place the insulation!On a helmet on the other hand, the space is confined, and the final product should not be too big, too heavy, too ugly.

Result, in passive insulation, and despite recent progress since the explosion of nomadic helmets (in particular memory foams, which ensure better waterproofing of the ear pavilion), it is rare to exceed 20 dB ofmitigation.

Comprendre : la réduction de bruit active - Les Numériques

The intra-ear headphones have given a considerable gain to passive insulation: directly housed in the auditory duct, the obstruction is easier to obtain and more efficient.Result, with biflanges or foam ends, it is possible to exceed 26 db of mitigation.It is already four times better than the attenuation of helmets!

But to further progress in this quest for absolute silence, it is difficult to go further without transforming the nomadic helmet into a site anti-noise helmet.The use of active technology becomes compulsory.

To infinity and beyond !

Second half of the 20th century, in the midst of the Cold War, the space conquest became a priority for the USA.After the success of the Apollo program, NASA is embarking on the development of a space shuttle allowing regular travel and interventions in space.

Tags: With my headphones I hear that a headset