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本音频信号分析仪由32位MCU为主控制器,通过AD转换,对音频信号进行采样,把连续信号离散化,然后通过FFT快速傅氏变换运算,在时域和频域对音频信号各个频率分量以及功率等指标进行分析和处理,然后通过高分辨率的LCD对信号的频谱进行显示。该系统能够精确测量的音频信号频率范围为20Hz-10KHz,其幅度范围为5mVpp-5Vpp,分辨力分为20Hz和100Hz两档。测量功率精确度高达1%,并且能够准确的测量周期信号的周期,是理想的音频信号分析仪的解决方案。
The audio signal analyzer by the 32-bit MCU-based controller, through the AD conversion, the audio signal is sampled, the continuous signal discretization, and then through the FFT Fast Fourier Transform operation in the time domain and frequency domain of the audio signal frequency Components and power indicators such as analysis and processing, and then through the high-resolution LCD signal spectrum display. The system can accurately measure the audio signal frequency range of 20Hz-10KHz, the amplitude range of 5mVpp-5Vpp, resolution is divided into 20Hz and 100Hz two files. Measuring power up to 1% accuracy and the ability to accurately measure the period of a periodic signal are ideal solutions for audio signal analyzers.