Explanation:
Sound waves are mechanical waves that require a medium to propagate. In the case of air, sound waves travel as longitudinal waves, where the particles of the medium vibrate parallel to the direction of wave propagation. While sound waves can exhibit various phenomena, such as refraction, diffraction, interference, and polarization, the effect of polarization cannot be observed for sound waves in air.

Refraction:
Refraction is the bending of a wave as it passes from one medium to another, caused by a change in its speed. Sound waves are refracted when they pass through mediums of different densities. For example, when sound waves pass from air to water, their speed changes, and they bend at the interface between the two mediums.

Diffraction:
Diffraction is the bending and spreading of waves around obstacles or through narrow openings. Sound waves can diffract when they encounter obstacles or pass through small openings. This phenomenon allows us to hear sounds from around corners or even through closed doors.

Interference:
Interference occurs when two or more waves overlap and combine to form a resultant wave. Sound waves can interfere constructively or destructively, depending on the phase relationship between the waves. This phenomenon is responsible for phenomena such as beats and the production of sound interference patterns.

Polarization:
Polarization refers to the orientation of the oscillations of a transverse wave. Transverse waves have oscillations perpendicular to the direction of wave propagation, unlike longitudinal waves like sound waves. Therefore, sound waves cannot be polarized because they do not exhibit oscillations in a specific direction perpendicular to their propagation.

In conclusion, while sound waves in air can exhibit refraction, diffraction, and interference, they cannot be polarized.