在语音识别，雷达信号处理生物医学信号检测与识别等应用领域广泛使用基于离散傅里叶变换（FFT快速算法）的频谱分析技术。-Widespread use of spectral analysis technique based on discrete Fourier transform (FFT fast algorithm) in speech recognition, radar signal processing biomedical signal detection and recognition applications.