电子器件2024，Vol.47Issue(4)：935-940,6.DOI:10.3969/j.issn.1005-9490.2024.04.010
基于STM32单片机的音响品质测试仪
Audio Quality Measuring Device Based on STM32
摘要
Abstract
To evaluate the total harmonic distortion(THD),frequency response range and other parameters of audio equipment,an audio quality measuring device is designed based on the STM32F407VET6 single-chip microcomputer.Powered by a lithium battery with a Buck circuit,the device uses the audio pickup circuit to complete the signal acquisition.With he external 16-bit A/D module for signal ADC sampling,the fundamental voltage amplitude and four harmonic amplitudes are obtained by using FFT algorithm.Accordingly the frequency response ranges of the equipment are obtained,which can be displayed on the screen ultimately.The results show that the device has high testing accuracy and reliability.Through comparing the testing data of the device with the data provided by the audio manufactures,it is found that both the THD and frequency response ranges have small errors.The device can meet the practical requirements of use.关键词
STM32单片机/音响品质测试/FFT算法/失真度/频响范围Key words
STM32 single-chip microcomputer/audio quality test/FFT algorithm/total harmonic distortion/frequency response range分类
信息技术与安全科学引用本文复制引用
刁楚涵,王艳,陈敏杰,付山峰,林书乐..基于STM32单片机的音响品质测试仪[J].电子器件,2024,47(4):935-940,6.基金项目
国家自然科学基金项目(11705108) （11705108）
