The sound waves, by the virtue of it being a wave, shows diffraction and interference. But in diffraction, I learnt that if the wave is allowed to enter through a small aperture, there is a central maxima, along with several minima (zero intensity) on the sides.
Why then in everyday life do we not encounter a situation in which we are at one of those minima and fail to here any sound? For example,in a soundproof studio room, suppose the narrow open door is the only entry point for sound, can we then find a spot where we hear nothing going on outside but by shifting to either side, we can hear it (although with different intensities)?
Why aren't such phenomenon encountered in daily life, not being able to hear a source because of diffraction (or interference)? My question also relates to radio waves whose wavelengths is comparable to that of sound waves.