1. Kierunek „Elektronika”, rok II
Electroacoustics
Kierunek „Elektronika”, rok II

2. Acoustic field in rooms

3. Frequency ranges L c 2 V Tp f 2000 = 4 Lumped parameters Frequency
Wave theory
Statistical
theory
Geometrical L c 2 V Tp f k
2000 = 4

4. Rise and decline of sound in a room
Steady state
Reverberation

5. Reverberation Time RT60

6. Formulas for RT60 (according to statistical theory)
Formula of Sabine
Formula of Eyring
Formula of Knudsen (with absorption in the air)

7. Absorbtion according to Eyring i Sabine
Ey(a) – effective absorption coefficient according to Eyring

8. Recommended reverberation time

9. Sound absorbing materials

10. Absorption coefficients of porous materials

11. Absorption coefficient of Helmholtz resonator

12. Room resonances according to wave theory (Room No. 607 C-5)

13. Geometrical theory

14. Design of large halls

15. Echogram