RESEARCH ON THE DESIGN OF ACTIVE NOISE-CANCELING EARPHONE SYSTEM IN HIGH VOLTAGE CONVERTER STATION

摘要

With the continuous development of industry and traffic, as well as the improvement of people's health awareness, noise problem has been widely concerned, active noise control research has become a rapidly developing subject. Among the numerous noise protection equipment, the noise-reducing earphone is a relatively effective and mainstream way of protection. A general protective earphone, its noise suppression mode is to use passive noise reduction. The principle of active noise reduction is to use the principle of interference cancellation of sound waves to artificially generate a secondary noise in the characteristic space that is opposite to the original noise in-phase and equivalent in amplitude and frequency, and to offset with the original noise to achieve the purpose of reducing noise. Based on this, this paper studies the design of an active noise-canceling headphone system through active noise-canceling technology and tests it through experiment. The test results prove that active noise-canceling headphone design is feasible and can achieve a good noise canceling effect.