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Lukáš Černý

28 . 07. 2011. Lukáš Černý. Exploration and exploitation of acoustic shielding materials. Supervisor Prof. Dr. Ali H. Reshak. Environmental protection program of developted countries : 1. Air pollution 2. Water pollution 3. Acustic pressure High noise for long time can couse :

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Lukáš Černý

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  1. 28. 07. 2011 Lukáš Černý Exploration and exploitation of acoustic shielding materials Supervisor Prof. Dr. Ali H. Reshak

  2. Environmentalprotection program ofdeveloptedcountries: 1. Airpollution 2. Waterpollution 3. Acusticpressure Highnoiseforlongtimecancouse: 1. Specificdisturbancs • Deafness 2. Non-specificdisturbancs • Psychicalproblems • Low Performance Environmentandhealth

  3. Ear translates frequency into nerve impulses Low frequency under 16 - 20Hz infrasound High frequency over 20 KHz ultrasound Whatwecanhear

  4. Shieldingmaterials

  5. Shieldingmaterials - types Absorbing Diffusing Bass trap

  6. Reduce noise • Changing filtres • Individually use • Excellent sound EarProtection

  7. Measurevalue

  8. Background 34 dB • Noise level 45,5 dB • Day limit 50dB 6am – 10 pm • Night limit 40dB 10pm – 6am • Reduce noise 5,5dB till 125Hz results

  9. Thanks to: Supervisor prof. Dr. Ali H. Reshak My colleagues for support Summer school for opportunity Sponsor acknoledgments

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