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Audio Spotlighting

Audio Spotlighting. Introduction. Why Audio spotlighting? Because coventional sound systems emits sound in all directions In order to pursue directional sound beams we are stepping towards Audio spotlighting. Theory .

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Audio Spotlighting

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  1. Audio Spotlighting

  2. Introduction • Why Audio spotlighting? • Because coventional sound systems emits sound in all directions • In order to pursue directional sound beams we are stepping towards Audio spotlighting

  3. Theory • Even the most sophisticated hi-fi speakers have a difficult time in reproducing clean bass • So accuracy is not achieved in conventional Audio systems

  4. Audio spotlighting production • Smaller wave length hence lesser the beam angle • Source loud speaker can be of several times bigger than the wavelength of the sound transmitted

  5. Components • It consists of 3 major components A thin, circular transducer array A signal processor Amplifier

  6. Projections specifications • Transducer of .5 inches thickness and an active area of 1 foot in diameter • Produces 3 degree wide beam of sound i.e, even audible at distances over 100 meters

  7. Working principle • Works on the principle of non linearity of air • Uses ultra sound pulses • It divides known as parametric array employs non linearity of air • Creates audible bi products from in audible ultra sound frequencies

  8. Gradual distortion in ultra sound beams produces in a predictable way • When light beam is focused the air itself acts as a demodulator

  9. Production • Uses similar to the idea of amplitude modulation • Produces two frequency sets • One with the volume of original sound wave is propotional to the ultra sounds • The other with the volume of the signal distorted components is exponential

  10. Types of projections • Two ways of projection • Direct audio projection • Projected audio projection • bommallu2

  11. Comparision • Creates highly focused beam of sound • Uses inherent non linearity of air for demodulation • Two ways to use –directed and projected audio • Wide range of applications • Highly “cost effective”

  12. Applications • Target selection is possible • Replaces walkie-talkie • Used in navy systems • Used for private messaging systems

  13. Future scope • Replaces headsets • Audio parks • New branch in acoustics

  14. Conclusion • Being the most radical technological development in acoustics since the coil loud speakers were invented in 1925 … audio spotlighting will force people to rethink their relationship with sound • So we can conclude that audio spotlighting really “put sound where you want it” and will be “a real boon to the future”

  15. Thank you

  16. Any Queries??

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