南京大学学报（自然科学版）2023，Vol.59Issue(6)：1059-1068,10.DOI:10.13232/j.cnki.jnju.2023.06.015
基于模态控制法的平板扬声器指向性控制算法研究
Research on directivity control algorithm of flat-panel loudspeakers based on modal control method
卫文港 1程嘉正 1冯雪磊 1沈勇1
作者信息
- 1. 近代声学教育部重点实验室,南京大学物理学院,南京,210023
- 折叠
摘要
Abstract
Flat-panel loudspeakers,which use an exciter to drive a thin plate to produce bending vibration and radiate sound waves,have been used in mobile phones,TV sets and other devices.The modal control method has been studied deeply in the field of vibration control of flat-panel loudspeakers,but no precedents have been found to apply it to the directional control of flat-panel loudspeakers.Here,the modal control method is innovatively introduced to realize the directional sound field control of the flat-panel loudspeaker,and the frequency transfer function formula of the driven voltage of the driven coil actuator to the modal excitation of the flat-panel loudspeaker is derived for the first time.Based on numerical simulation,this paper uses modal control method to control the acoustic radiation characteristics of the lat-panel loudspeaker.The results show that the modal control method can control the beam main lobe axis direction and coverage angle effectively.Directivity control is the key to realize directional sound production.关键词
平板扬声器/指向性控制/模态控制法/算法Key words
flat-panel loudspeaker/directivity control/modal control method/algorithm分类
数理科学引用本文复制引用
卫文港,程嘉正,冯雪磊,沈勇..基于模态控制法的平板扬声器指向性控制算法研究[J].南京大学学报（自然科学版）,2023,59(6):1059-1068,10.
