CAJ | 학술논문

首先以匀质铁板为例，利用混响室—半消声室法进行频率隔声特性的测试，并将测试结果与混响室—混响室隔声测试结果进行对比分析；然后，基于半消声室模拟半无限声场的特性，在混响室—半消声室环境下分别对V型声屏障进行表面声透射及声传播指向性识别。结果表明，混响室—半消声室法频率隔声特性测试结果与半消声室一侧的测点位置有关，当测点位置较为合适时，能够与混响室—混响室法测试结果较好的吻合；混响室—半消声室法能够识别样件的表面声透射特性及声传播指向特性，从而为找到其隔声薄弱环节以及声音透过样件后的传播和衰减规律提供更加直观的数据参考，对进一步提高其隔声性能并改善声场环境具有指导意义。
수선이균질철판위례，이용혼향실—반소성실법진행빈솔격성특성적측시，병장측시결과여혼향실—혼향실격성측시결과진행대비분석；연후，기우반소성실모의반무한성장적특성，재혼향실—반소성실배경하분별대V형성병장진행표면성투사급성전파지향성식별。결과표명，혼향실—반소성실법빈솔격성특성측시결과여반소성실일측적측점위치유관，당측점위치교위합괄시，능구여혼향실—혼향실법측시결과교호적문합；혼향실—반소성실법능구식별양건적표면성투사특성급성전파지향특성，종이위조도기격성박약배절이급성음투과양건후적전파화쇠감규률제공경가직관적수거삼고，대진일보제고기격성성능병개선성장배경구유지도의의。
The sound insulation effect of an isotropic iron plate was measured based on the approach of reverberation room and semi-anechoic room, and the result was compared with the method based on reverberation room and reverberation room. Then, based on the semi-infinite sound field characteristics of the semi-anechoic room, the surface sound transmission and the directivity of sound propagation of a V-type sound barrier were recognized. It is concluded that the sound reduction result of the plate tested by the approach of reverberation room and semi-anechoic room is related to the position of measurement points. If the measurement points are properly distributed, the sound reduction result can agree well with that tested by the method of reverberation room and reverberation room. The test method of reverberation room and semi-anechoic room can identify the characteristics of the surface sound transmission and the directivity of sound propagation, so as to provide more visual data references to recognize the portions with lower sound insulation effect and the sound propagation and reduction laws after the sound has passed the material. This work is helpful to promote the sound insulation of the material and improve the sound field environment.