Why is the Hamming and Hanning window the most widely used for speech spectograms?

1. Why Hamming window is used in speech processing?
2. Which window function is better Hamming or Hanning and why?
3. What is Hamming and Hanning window?
4. Which windowing technique is best?

Why Hamming window is used in speech processing?

With what I know about sound and quick research, it appears that Hamming Window is here to minimize the signal side lobe (unwanted radiation). Thus improving the quality or harmonics of the sound.

Which window function is better Hamming or Hanning and why?

Hamming and Hanning

Between the two, the Hamming window does a better job of cancelling the nearest side lobe, but a poorer job of cancelling the rest. Due to their speed and good-enough noise performance, these windows have historically seen use in voice communications.

What is Hamming and Hanning window?

The Hamming window is an extension of the Hann window in the sense that it is a raised cosine window of the form. (A3.10) with a corresponding spectrum of the form. (A3.11) The parameter a permits the optimization of the destructive sidelobe cancellation mentioned in the description of the Hann window.

Which windowing technique is best?

The Hamming window is preferred by many due to its relatively narrow main lobe width and good attenuation of the first few side lobes.