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

2. Environment and health
Environmental protection program of developted countries:
1. Air pollution
2. Water pollution
3. Acustic pressure
High noise for long time can couse:
1. Specific disturbancs
Deafness
2. Non-specific disturbancs
Psychical problems
Low Performance

3. What we can hear Ear translates frequency into nerve impulses
Low frequency under Hz infrasound
High frequency over 20 KHz ultrasound

4. Shielding materials

5. Shielding materials - types
Absorbing
Diffusing
Bass trap

6. Ear Protection Reduce noise Changing filtres Individually use
Excellent sound

7. Measure value

8. results 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

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