Audio devices are getting to the point where they can be very subtle and practically merge into the background environment. Of course, sometimes the newest technology (that is, applied science) is not cutting edge itself, but in the application of known facts. This is where the simple but effective bone conduction technology fits in, and at Brühl’s Terrace in Dresden, Germany it works quite well.
To experience the "Touched Echo" display, visitors rest their elbows on the railing and put their hands to their ears. Their arms and hands act as a sound conductor, delivering the sound to their ears. No other hardware is required, and there is nothing to break down or need replacing. The display does not disturb other visitors, since there is no sound transmission without physical contact.
The display itself is a recreation of the sounds of explosions, airplanes, dropping bombs,air raid horns, and more that happened on the site on February 13, 1945. The video shows the audio display in action with some casual users.
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