| 摘要 |
An advertising, instructional or musical message or combination thereof is played, usually at a public location, as a part of a cycle by causing, through an electrical circuit network, a sound player (26) such as a record player or a tape player, to start operating and playing the message in response to an initiating source (10), for example, an approaching person or object or a moving object such as an opening and/or closing elevator door, and to stop operating and playing the message after the message has ended or other designated time. |
