After a supersonic object passes, its sound can still arrive from two locations simultaneously.

Evidence

Note that the sound of the supersonic source persists after the shock wave has passed a given spot. In fact, as seen at Mach 4.0, sound at the black dot after the object has passed is arriving from two places at once, A and B, both emitted by the object at different times! — Eric J. Heller, Why You Hear What You Hear- An…, 639

Categorization

• QUESTION: This multi-path arrival gives a potential acoustic mechanism for the sustained boom heard long after a supersonic craft passes overhead.