|
Introduction |
Here's a Sony wireless stereo earphone system consisting of an infrared transmitter and receiver pair, dating from around 1993. At that time, there was no such thing as an iPod and so the smallest personal audio players were cassette tape Walkmans or compact disc Discmans. With this wireless earphone kit, you could listen to your stereo, free to wander around the room without one of those 10 foot headphone cords or without a relatively bulky audio player attached to your belt.
Of course nowadays, you can have thousands of songs in an even smaller device attached to your shirt sleeve, so this kind of audio accessory is not so interesting any more for most consumers. However, this same basic technology is still in use in many places - for example some auditoriums will have large IR arrays providing wireless audio to the hearing impaired in the audience. | | | Let's take it apart to see what's inside... |
|