CAJ | 학술논문

研究了非自由场一般房间内利用扬声器阵列进行声场重现的方法。建立了房间内声场重现的系统模型，利用正则化最小二乘法和 L 曲线法获得了实现声场内多个控制点定量重现的驱动信号频域特性，然后采用 L 曲线滤波器设计得到了阵列扬声器时域驱动信号。实际汽车噪声的重现结果表明：L 曲线滤波方法能够实现扬声器驱动信号功率与声场重现误差之间的平衡，可以在非自由场内实现稳态声场的定量重现。
연구료비자유장일반방간내이용양성기진렬진행성장중현적방법。건립료방간내성장중현적계통모형，이용정칙화최소이승법화 L 곡선법획득료실현성장내다개공제점정량중현적구동신호빈역특성，연후채용 L 곡선려파기설계득도료진렬양성기시역구동신호。실제기차조성적중현결과표명：L 곡선려파방법능구실현양성기구동신호공솔여성장중현오차지간적평형，가이재비자유장내실현은태성장적정량중현。
L-curve-filtering method for sound field reproduction in a general room with a loudspeaker array was studied.Firstly,the system model used for the sound field reproduction in a room was established.Then,the regularized least-square method and L-curve method were used to obtain the filtering properties in frequency domain of drive signals of speakers,they reproduced the sound pressures of multiple controlled points quantitatively.Finally,a L-curve-filter was designed to obtain the time domain drive signals of the loudspeaker array.The test results to reproduce a vehicle noise showed that L-curve-filtering method can balance the power of drive signals and the sound field reproduction error to realize the sound field reproduction in a general room.