Notre Dame is reopening. What does that mean for its acoustics? 

Some researchers are more interested in how the cathedral sounds than how it looks 

An image inside the Notre Dame cathedral shows a high vaulted ceiling and arches.

Notre Dame cathedral, seen here in late November, has been restored after its 2019 fire. Acoustics researcher Brian Katz is studying the acoustics of the space and how that has changed throughout its history.

STEPHANE DE SAKUTIN/POOL/AFP/Getty Images

Notre Dame is back. And so are its acoustics.