Berlin Startup Holoplot Tests Steerable Sound in German Train Stations - IEEE Spectrum

http://spectrum.ieee.org/tech-talk/consumer-electronics/audiovideo/holoplots-steerable-sound-beams?utm_source=feedburner&utm_medium=twitter&utm_campaign=Feed%3A+IeeeSpectrumFullText+%28IEEE+Spectrum+Full+Text%29


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