摘要
音频分析系统在众多领域均有广泛的应用,此系统以TI的DSP芯片TMS320F2812作为控制和运算的核心,实现对频率范围在20Hz～10kHz的音频信号进行成分分析.利用快速傅立叶变换(FFT)算法得到音频信号的频谱,对其进行分析和计算处理;使用点阵式液晶屏(LCD)显示音频信号的总功率、各分量频率、失真度、周期等.通过测试,该音频信号分析仪使用简便直观、精确度高,只要接到信号源,即可观察信号的多种指标.
Audio analysis system is widely used in many fields.This system uses DSP chip TMS320F2812 of TI as the core of control and computation,and it is used for the analysis of the frequency components of the audio signal whose frequency is in the range of 20 Hz～10 kHz.It can get the frequency spectrum of the audio signal through FFT.The total power,the component frequency,the distortion degree and the cycle of the audio signal can be displayed on LCD through the analysis and treatment of the frequency spectrum.The experimental results show that many indexes of the signal can be observed only if the audio signal analysis system is connected to the signal source,and that its precision is high and its operation is simple.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2009年第1期85-87,共3页
Journal of Xi’an Shiyou University（Natural Science Edition）
