| 摘 要： | In this paper,theoretical and experimental results for study of the acoustical mechanism ofthe active sound absorber are presented.Several conclusions have been drawn: (1)When the secondary source system is a unidirectional source,all the energy in the in-cident wave will be absorbed by the secondary source system with no energy reflection. (2)The energy absorbed by the secondary source system is lost in heat in the loudspeakercoils. (3)The process of energy absorption may be described as follows:the incident energy is partlyabsorbed by source Ⅰ in the secondary source system,the transmiting energy will be reflected backby source Ⅱ in the secondary source system and absorbed finally by source Ⅰ.
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