| 摘要 |
An even broadcasting system in concert halls intended to be used by the blind permitting them to enjoy shows by the narration of images and scenes, as well as providing information in other places to guide them safely. The system has a device (CD, DVD, mini-disc. etc.) where the information that should reach the user is recorded. This reader sends the information to an infrared amplifier that processes the audio signal, transforms it into an infrared signal and amplifies it to be transmitted to one or more infrared transmitters. The waves transmitted by the transmitter are captured by the user's receiver converting them into sound to be broadcast through the headset. In the case of shows, the narration is perfectly synchronised with the original film sound track, using the dead spaces for such a purpose and hence avoiding companions' dialogues in the cinema or theatre.
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