| 摘要 |
A listening device can be configured to receive an audio signal from a specific source. For example, the listening device may be configured to receive commentary at a sporting event or may be configured to receive audio from a television transmission. The listening device may be part of a system adapted to send the audio signal, and may also be configured to insert advertising into the audio stream where appropriate. For example, at a baseball game, the stadium may send an audio signal that with game stats, commentary and the like. Many fans may desire to receive such commentary and may, rent or buy a listening device specifically designed to receive the audio signal from the stadium. The stadium may then insert advertising in between innings, for example. This may permit the stadium to gain revenue through advertising, while also provide the fans with advertising that may be of interest.
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