When air rapidly heats up, it can indeed cause a shockwave, commonly known as a "sonic boom." However, the reverse process of hot air rapidly contracting does not typically produce a similar shockwave phenomenon.
A sonic boom occurs when an object, such as an aircraft, moves through the air at a speed faster than the speed of sound (supersonic speed). As the object moves, it creates a pressure disturbance in the surrounding air. When the object exceeds the speed of sound, these pressure disturbances merge and form a shockwave, which is heard as a loud boom.
When air rapidly contracts, such as during the cooling process, it does not generate a shockwave in the same manner as during rapid heating. Cooling air does cause changes in pressure and density, but these changes generally occur more uniformly and do not create the same type of focused, high-intensity shockwave as seen with a sonic boom.
It's important to note that while cooling air does not produce a shockwave, it can lead to other phenomena depending on the conditions and surroundings. For example, rapid cooling of air near a solid surface can cause thermal contraction stresses, which may result in cracking or structural changes in the material. However, these effects are typically localized and do not propagate as a distinct shockwave through the air.