1. Sound insulation materials and constructions Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

2. Content 1. Sound insulation vs. Sound absorbing/Airborne sound and impact sound 2. System for sound insulation of partition wall 3. System for sound insulation of ceiling 4. System for sound insulation of floor 5. Soundproofing doors 6. Sound insulation of windows 7. A little theory.... Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

3. Sound insulation vs. Sound absorbing The sound insulation reduces the amount of passed through the barrier sound energy “W t ” The sound absorbing reduces the amount of the reflected back in the premises sound energy “W r ”

4. Airborne sound and impact sound Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

5. Basic principles of the sound insulations The effective sound reduction is achieved through the combination of sound absorbing and sound insulation Sound reduction Sound insulation (W o -W T ) Sound absorbing W a Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

6. Basic principles of the sound insulation The combination of light boards with air volume between them increases the sound insulation between two premises Double wall Rw = 36 dB Single wall Rw = 30 dB Two separate walls Rw = 50 dB Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

7. System for sound insulation of partition wall 1.Sound absorbing material; 2.Sandwich panels with elastic membrane between them; 3. Rubber spacer; 4. Vibro hanger; Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

8. инж. Цветан Недков, Технически университет София 2014 г. The sound absorbing material can be from mineral wool, polyester wool or foamed polyurethane Mineral wool Thickness 30 – 100 kg. /m3 Coefficient of air flow resistivity 10 000 – 40 000 Rayl/m Polyester wool Thickness 10 – 60 kg./m3 Coefficient of air flow resistivity 2000 – 10 000 Rayl/m Foamed polyurethane Thickness 18 – 100 kg./m3 Coefficient of air flow resistivity 10 000 – 20 000 Rayl/m System for sound insulation of partition wall

9. The panels which are used for partition can be gypsum, gypsum faser, cement faser board or wooden boards Gypsum Density 600 – 700 kg. /m3 Thickness: 9.5, 12.5, 15 мм Gypsum faser Density 1130 – 1180 kg. /m3 Thickness: 10, 12.5, 15, 18 мм Cement fdaser board Density1300 kg. /m3 Thickness: 10, 12.5, 15 мм Wooden boards Density 500-800 kg. /m3 Thickness: 8, 10,15,20 мм System for sound insulation of partition wall Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

10. The elastic membrane can be bitumen membrane with supplements or heavy vinyl Bitumen membrane Density 1200 – 1800 kg. /m3 Thickness: 2, 4, 5 mm Heavy vinyl: Density1800 – 2000 кг. /м3 Thickness: 1, 2, 3, 4 mm System for sound insulation of partition wall Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

11. The rubber spacer separate the hanging construction by the perimeter of the wall System for sound insulation of partition wall Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

12. The separation of the two boards of the elastic connection improves the efficiency of the sound reduction constructions Vibro hangers The metal part with rubber pad of SBR or EPDM rubber System for sound insulation of partition wall Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

13. The index of sound insulation Rw of the partition wall with or without insulation Rw of brick wall = 37 dB Rw of brick wall with sound insulation= 58 dB System for sound insulation of partition wall Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

14. Curve describing the index of sound insulation of partition Rw System for sound insulation of partition wall Resonance frequency Natural frequency of oscillations Bending stiffnes Volume / weight / Index of sound insulation (dB) Frequencies of coincidence Frequency(Hz) Breakthroughs in the efficiency of the sound insulation Effect of the coincidence Influence of the properties of the materials over the sound insulation ①②③④①②③④ Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

15. Index of sound insulation Rw of partition wall without sound absorbing in the air gap Rw without sound absorbing = 45 dB Rw with sound absorbing = 58 dB System for sound insulation of partition wall Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

16. Index of sound insulation Rw of partition wall with rigid connection and with vibro hanger Rw rigid connection = 55 dB Rw vibro hanger = 58 dB System for sound insulation of partition wall Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

17. Index of sound insulation Rw of partition wall with one layer gypsum Rw one layer gypsum = 50 dB Rw two layers of gypsum borads = 58 dB System for sound insulation of partition wall Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

18. Index of sound insulation Rw of partition wall with air gap 150 мм Rw with air gap 50 мм = 58 dB Rw with air gap 150 мм = 63 dB System for sound insulation of partition wall Sound absorbing 50 мм /rock wool/ Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

19. 1.Concrete slab; 2.Sound absorbing layer; 3.Hanging construction; 4,5,6.Boards with elastic material between them; 7. Vibro hanger; System for sound insulation of ceiling Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

20. System for sound insulation of ceiling Used materials and hanging constructions in ceiling sound insulation systems Boards Sound absorbing materials Elastic layers Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

21. Index of sound insulation Rw of suspended ceiling Rw of concrete slab 140 мм = 54 dB Rw of the sound insulation system with air gap 50 mm = 73 dB System for sound insulation of ceiling Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

22. Index of sound insulation against impact noise Ln,w of suspended ceiling Ln,w concrete slab 140 мм = 80 dB Ln,w of sound insulation system with air gap 50 mm = 53 dB System for sound insulation of ceiling Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

23. System for sound insulation of floor from impact noise 1.Concrete slab; 2.Elastic membrane, mineral wool, elastomeric with high density; 3,4,5 Floor coating, laminate, carpet; 6.Baseboard; Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

24. System for sound insulation of floor from impact noise Elastic membrane Density 600 – 1800 kg. /m3 Thickness: 2,3, 4 to 10 mm Mineral wool Density 150 – 180 kg./m3 Thickness: 20 to 100 mm Elastomeric Density 80 – 150 kg./m3 Thickness: 5 to 30 mm Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

25. Index of sound insulation of impact noise Ln,w of floor Ln,w of concrete floor 140 мм = 80 dB Ln,w with elastic pad 6 mm = 55 dB System for sound insulation of floor from impact noise Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

26. Index of sound insulation of impact noise Ln,w of floor Ln,w of concrete floor 140 мм = 80 dB Ln,w with mineral wool 50 mm = 59 dB System for sound insulation of floor from impact noise Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

27. Index of sound insulation of noise Ln,w of floor Ln,w of concrete floor 140 мм = 80 dB Ln,w with elastomer 30 mm = 49 dB System for sound insulation of floor from impact noise Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

28. Sound insulating doors 1.Metal plate; 2.Elastic membrane layer; 3.Heavy thick layer; 4. Sound absorbing layer; 5.Door case; 6.Seals; 7.Lock; 8.External hinges; Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

29. Sound insulation of windows Basic principals during selection of sound insulating windows: - The windows should be with different thickness when are combined – for exmp. 4 + 6 mm or 4 + 8 mm; -The usage of wider spacers increase the index of sound insulation; - In glued together windows the adding of PVB membrane increases the index of sound insulation; -The frame and the connection to the wall have significant meaning; -The sizes of the frames – in increasing sizes of the window without extra framing the index of sound insulation is decreasing; - If it’s possible to be added sound absorbing to the internal perimeter of the frame; Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

30. Sound insulation windows Index of sound insulation Rw of single window 4 mm Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

31. Sound insulation of windows Index of sound insulation Rw of double window 4 + 12 mm air + 4mm Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

32. Sound insulation of windows Index of sound insulation Rw of double window 4 + 12 mm air + 6 mm Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

33. Sound insulation of windows Index of sound insulation Rw of double window 4 + 24 mm air + 6mm Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

34. Sound insulation of windows Index of sound insulation Rw of double window 4 + 24 mm air + 2х4mm glued with PVB membrane Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

35. Model of Sharp for calculation of sound insulation of double partition Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.

36. Thank you for your attention! Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.