This advertisement speaks for itself - literally. When readers of the Times of India opened their morning paper, an audio chip placed within the pages produced its advertisement as soon as the photodiode that powered the chip was exposed the light.
Listen to the ad in this short video.
(Volkswagen newspaper ad)
Fans of author Greg Bear recall the speaker chips used for advertisements in books in his 2003 novel Darwin's Children:
Without thinking, Kaye turned right and found herself in the religious section. Most of the shelves were filled with brightly colored apocalypse novels...
Most of the books had speaker chips that could read out the entire story. The same chips replaced jacket copy with vocal come-ons. The shelves murmured softly in a wave, like ghosts triggered by Kaye's brief passage.
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Prairie Madness - And Space Sickness
'Space-sickness is one of the most unpleasant sensations that a human being can experience. Not all are subject to it...'
'Old People Began to Cross The Continent In Their Own Cars'
'It was a relief to enter one of the comfortable autos, whisper a direction down the tube, and just know that you would be taken to your destination in the quickest, safest, and cheapest manner.'
Starfall Manufacturing Drugs In Space
'The vast spinning sphere of Factory in the Sky loomed above and ahead of us, gleaming white against the unfathomable jet depths of surrounding space.'
The Solar Oberth Slingshot
'And if it doesn’t work,' inquired Lazarus, 'what does that make us? Sunspots?'
'If Anyone Is Watching Earth...'
'Our study of your race has convinced us that you are not fitted to leave your planet in the present state of your civilization.'