| 摘要 |
FIELD: machine building. ^ SUBSTANCE: here is disclosed system (10) of active noise damping for active reduction of intensity of primary sound waves (16) containing control device (11), sensor (12) of error, reference sensor (13) and several exciters (14) of secondary sound waves. Exciters (14) of secondary sound waves are designed to emit waves (15) of noise damping. Also, control device (11) connected to secondary exciters (15) processes error signal (F) and reference signal « and generates secondary signal (S) transmitted to secondary exciters (14) through corresponding communication lines to control their emission. Thus, secondary exciters (14) emit waves (15) of noise damping, which decrease error signal (F) and facilitate optimal attenuation of sound waves. Secondary exciters (14) are positioned at boundary of open passage (21) letting primary sound waves (16) to ensure active attenuation of sound waves in open space in the direction of their transmission behind open passage (21) by means of waves of noise damping operating as "acoustic screen". ^ EFFECT: raised efficiency of system. ^ 7 cl, 1 dwg |
