Subliminal advertising!

Mind control here we come! "A German firm is proposing to transmit adverts via train windows so that the sound appears to "come from inside the user's head" when passengers lean against them.

The idea would use bone conduction technology, a technique that transmits sound to the inner ear by passing vibrations through the skull.

The concept has been developed by ad agency BBDO Germany on behalf of broadcaster Sky Deutschland."

Talking windows