Signal Processing

Spectrogram Analyzer - STFT Time-Frequency Visualization - 频谱图分析器

Interactive Short-Time Fourier Transform (STFT) Spectrogram Analyzer for time-frequency signal analysis. Features built-in signal generator (sine, square, chirp, noise, combined), audio file upload, adjustable window size (128-4096), window functions (Hann, Hamming, Blackman, Rectangular), colormaps (Inferno, Viridis, Magma, Grayscale), frequency scales (linear, logarithmic, Mel), dynamic range control, waveform display, real-time spectrogram heatmap, playback with cursor animation, mouse hover inspection, and STFT statistics. Educational content covers spectrogram fundamentals, time-frequency resolution trade-off, window functions and spectral leakage, applications in speech recognition, music analysis, seismology, radar/sonar, and medical diagnostics. Multi-language support (zh, en, es, fr, de, ru, pt).