Wiktionary
n. A tour where the information is given to the visitor through a collection of prerecorded speeches on a device that they carry around with them.
Wikipedia
An audio tour or audio guide provides a recorded spoken commentary, normally through a handheld device, to a visitor attraction such as a museum. They are also available for self-guided tours of outdoor locations, or as a part of an organised tour. It provides background, context, and information on the things being viewed. Audio guides are often in multilingual versions and can be made available in different ways. Some of the more elaborate tours may include original music and interviews. Traditionally rented on the spot, more recently downloaded from the Internet or available via the mobile phone network. Some audio guides are free or included in the entrance fee, others have to be purchased separately.
Usage examples of "audio tour".
The pretentious audio tour described a refrigerated bust made out of the artist's own blood - which was not even sculpted, just poured into a cast - as a statement about life itself.
General OToole walked over to the small kiosk beside the elevator and rented a forty-five-minute audio tour cassette that was ten centimeters square and easily fit in his coat pocket.