Active noise control system for closed spaces such as aircraft cabin

摘要: An active noise control system ( 20 ) which generates via an electronic controller 22 a canceling signal(s) are responsive to signal from error sensor(s) 28 drive speaker 30 or array of speakers. Each is contained within enclosure 33 and inversely rigidly mounted therein. The attaches the trim panels 25 attached closed structure 34 sound wave form directed primarily toward interior surface 36 ). Preferably, speaker(s) flexibly suspended with mounts 38 preferably includes planar guide means such as escapeways 40 for initially directing (anti-noise) in plane substantially parallel