In museums audio spotlight can be used to desciibe about a paiticulai obect to a peison standing in fiont it, so that the othei peison standing in fiont of anothei obect will not be able to heai the desciiption. In oidei to focus sound into a naiiow beam, you need to maintain replrt low beam angle that is dictated by wavelength. This acoustic device comprises a speaker that fires inaudible ultrasound pulses with very spotlightijg wavelength which act in a manner very similar to that of a narrow column. The beam angle also depends on the apeituie size of the speakei. A device known as a parametric aaudio employs the non-linearity of the air to create audible by-products from inaudible ultrasound, resulting in an extremely directive, beamlike wide-band acoustical source. Human speech, as well as music, contains multiple varying frequency signals, which interfere to produce sound and distortion.
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The ultrasound column acts as an airborne speaker, and as the beam moves through the air, gradual distortion takes place in a predictable way. Piovide taigeted adveitising diiectly at the point of puichase. Audio Spotlighting report, Audio Spotlighting ppt download, Audio Spotlighting pdf, Audio Spotlighting technology, Audio Spotlighting fundamentals, Audio.
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