Calculadora de Ancho de Banda de Función Ventana Gratis
Compara el ancho de banda del lóbulo principal de funciones ventana: Hanning, Hamming, Blackman.
Rectangular ENBW
46.88 Hz
Rectangular ENBW vs Sampling Rate
Fórmula
## Window Function Bandwidth Window functions reduce spectral leakage but widen the effective frequency resolution. ### Equivalent Noise Bandwidth (ENBW) **ENBW = Bin Width x ENBW Factor** ENBW factors for common windows: - Rectangular: 1.00 (narrowest but worst leakage) - Hamming: 1.36 - Hann: 1.50 - Blackman: 1.73 - Flat Top: 3.77 (best amplitude accuracy) The choice of window balances frequency resolution against spectral leakage. No window is universally best.
Ejemplo Resuelto
1024-point FFT at 48 kHz comparing window functions.
- 01Bin width: 48,000 / 1,024 = 46.875 Hz
- 02Rectangular ENBW: 46.875 x 1.0 = 46.88 Hz
- 03Hann ENBW: 46.875 x 1.5 = 70.31 Hz
- 04Blackman ENBW: 46.875 x 1.73 = 81.09 Hz
Preguntas Frecuentes
Which window should I use?
Hann is a good general-purpose choice. Use rectangular for transients, flat-top for amplitude accuracy, and Blackman for maximum sidelobe rejection.
What is ENBW?
Equivalent Noise Bandwidth is the width of an ideal rectangular filter that would pass the same noise power as the window.
Does the window affect measurement accuracy?
Yes. Wider ENBW means more noise in each bin. Flat-top windows have wide ENBW but give the most accurate amplitude readings.
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