HomePod dynamically adjusts audio output to match the dimensions of the room. When the HomePod scans my house, does it send this information to Apple servers?
No room mapping data is sent to Apple. HomePod can automatically customize its sound based on the interior of the room. Moving the HomePod means it will scan the area and map sound to the new space.
While some products have been known to collect and upload data about the layout of a home, HomePod performs all analysis locally. Nothing is sent to Apple's servers until Siri is asked a question using the statement "Hey Siri".HomePod is capable of using its on-board processor to adjust music output based on the locations of sound-reflecting objects in the room.