关键词: 噪声主动控制, 源声场, 次级声场

Abstract:

Experimental investigation is performed for cabin noise of Y 7 airplane, in which an active noise control technique is employed. Based on the preceding experiments and theoretical analyses, the ability of source sound field and second sound field, the stability of system, the influence of shift of frequency, and the balance between the system and convergent factor are analyzed using experiment. At last, an experiment is achieved in the state of flying. The results show that this method is efficient.

Key words: active noise control, source sound field, second sound field