Research on Active Noise Resistant System of Speaker

• Main Authors: CHANG, WEI-CHIEH, 張偉傑
• Other Authors: CHANG, CHING-YUAN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/pdwnje

碩士 === 國立臺北科技大學 === 機械工程系機電整合碩士班 === 107 === This paper hopes to establish a system for measuring and modeling single characteristics. By cooperating with Foxconn tech, using the measuring instrument developed by KLIPPEL, the same monomer performance, such as Transfer Function, Peak to Peak Signal, sound The Sound Pressure Level (SPL) is used to verify the accuracy of the measured data and the processed program. Then use the measured input signal and output signal to calculate the mathematical model of the adaptive filter, which is used to predict the output signal in the system. Then use the adaptive filter establish a control model for the pre-processing of the input signal so that the output signal can be closer to the original signal to eliminate distortion. This study will be divided into two parts, the speaker system setup and the filter design. The first part is to establish a system that is effectively available, mainly using scale signals to measure the characteristics of the monomer. It is then verified by a commercially available measurement system. The second part is to use the complex frequency signal to excite the monomer characteristics, and use its characteristics to train the mathematical model of the adaptive filter. Finally, a method to eliminate delay distortion is proposed.