This document discusses audience investigation and different theories about how audiences interact with media. It defines audience as the spectators or listeners of public events. It also discusses Stuart Hall's encoding/decoding theory of how audiences can have preferred, negotiated, or oppositional readings. Additionally, it covers Denis McQuail's uses and gratification theory that audiences consume media for surveillance, identity, relationships, or escapism. Finally, it mentions Ien Ang's view that audiences experience media in increasingly diverse and fragmented ways.