Recovery from temporary hearing shift takes roughly double the exposure time

Evidence

The recovery time can be from minutes to several days. As a general rule, one should allow about double the exposure time for recovery, or a time when hearing has recovered to normal. A sufficiently large exposure to noise leads to a permanent hearing threshold shift and the recovery to normal hearing does not happen. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2689

Categorization

• SHARE: Useful practical fact for concert-goers and anyone exposed to loud environments.
• DEFINE: Gives the practical recovery rule and marks the TTS-to-permanent shift boundary.