Table of Contents
Why Use Windows?
- It's not the software made by a company in Seattle.
- Spectral leakage actually occurs when you compute the FFT because it expects an infinitely long signal. What it actually gets is a signal that stops abruptly, requiring a lot more frequency power to create it, skewing the FFT.
- What you can do to combat that is use a windowing function, something that doesn't require much more frequency information. A hamming window is a good example. (seen below)
- You can also overlap windows if you're doing real-time spectral analysis.