Spectral Analysis of Sound Mastery Hub: The Industry Foundat

Within the context of the "The Complete Spectral Analysis & FFT Course 2026," when analyzing a non-stationary sound signal using FFT, what is the primary trade-off introduced by reducing the FFT window size to improve temporal resolution?

According to "The Complete Spectral Analysis & FFT Course 2026," what is the fundamental purpose of applying a window function (e.g., Hann, Hamming, Blackman) to an audio signal before performing an FFT, particularly when dealing with periodic components that do not perfectly align with the FFT frame boundaries?

In "The Complete Spectral Analysis & FFT Course 2026," when interpreting a spectrogram of a complex musical instrument's transient sound (e.g., a drum hit), what phenomenon is most directly observed as a rapid, broadband increase in energy across a wide range of frequencies, followed by a quicker decay of higher frequencies?