Here are some fascinating (for some people anyway) photos and videos of interesting condensation clouds that form around jets as they fly at or near the speed of sound, (often called “going through the sound barrier” or “accelerating past the speed of sound”). Under the right conditions, plus at lower speed, they sometimes cause a vapor cone effect.

Keep in mind that these types of Prandtl-Glauert condensation clouds can also happen from the lower performance, and so are not really a visible sign of some sort of an audio barrier getting damaged. Lees verder →