We all are familiar with lasers and their working. The desired feature of lasers is delivers concentrated beam providing high directionality. Holosonics’ Audio Spotlight technology exhibits the same characteristics and provides you a narrow beam of ultrasound frequencies, which makes these frequencies audible only after they interact with air.
Pompei’s amplifier has a signal processor that converts the audio signal into the ultrasonic signal, he says, so a regular speaker amplified just won’t cut it. This lets you hear the recording like you’re wearing headphones only when you step in the sound triggering column else your years are unable to hear any sound.
The technology is perfect for places like museums, banks, libraries and Starbucks stores etc and has also been brought in use in some parts of the world. Now it is being employed to advertisements and in future, it may be seen in common use.
via: popularmechanics
