What is the meaning of half window functions? In fig. 4 on p. 4 of the paper Extracting the frequencies of the pinna spectral notches in measured head related impulse responses (J. Acoust. Soc. Am. 118, 2005 ), a half Hann window is used (Hann window for positive time, zero for negative time). What is its meaning?
Because the head related impulse response (HRIR) is zero for negative time, you may as well interpret it so that they have used a full Hann window.