1. Acoustic PVB Technology Extending the Frontiers of Performance Glazing
Applications Module: SoundForm & Function 1998 Version

2. Topics Introduction to sound Basic principles of acoustics
Glazing acoustical performance
Acoustic PVB technology
Summary
Applications Module: SoundForm & Function 1998 Version

3. What is Sound? Pressure waves in air
Intensity can be measured at different wavelengths or frequencies

4. Human Audio Capability
Human ear is sensitive to sound in range of Hz
Hearing range
20 – 20k Hz
Most sensitive hearing
500 – 8k Hz
Human voice range
100 – 8k Hz
Key voice range for conversation
2k – 6k Hz

5. Threshold of Hearing
Most sensitive

6. Acoustics : Basic Principles
Sound Transmission Loss of a material =
ability to minimize sound passing through it . .
Receiver
Source

7. Sound Transmission Loss Spectrum (eg. : Monolithic Glass)
Critical Frequency Dip
Applications Module: SoundForm & Function 1998 Version

8. Sound Transmission Rating
A single number rating method to allow a
single value to be given to a TL spectrum.
Sound Transmission Class, STC
Outdoor-Indoor Transmission Class, OITC
Weighted Sound Reduction Index, Rw
Applications Module: SoundForm & Function 1998 Version

9. Glazing Acoustical Performance
Various types of glazing configurations :
Monolithic
Insulating
Laminated
Laminated
Insulating
Double Laminated
Insulating
Multi-ply
Laminated
Applications Module: SoundForm & Function 1998 Version

10. Glazing Acoustical Performance
The three basic features
Glass thickness
Insulating glass air space thickness
Interlayer damping
Interlayer
Glass
Spacer
Applications Module: SoundForm & Function 1998 Version

11. Glazing Acoustical Performance Increasing Glass Thickness
Increase in glass thickness will increase sound insulation performance
Highest STC for readily available glass is ~37 (for 12 mm glass)
Applications Module: SoundForm & Function 1998 Version

12. Glazing Acoustical Performance Increasing Glass Thickness
STC 37
STC 35
STC 32
STC 29
Applications Module: SoundForm & Function 1998 Version

13. Glazing Acoustical Performance Airspace Insulating Glass
Creating an air space between two panes of glass also increase sound isolation performance
Usually is most effective for an air space thickness >12mm
Applications Module: SoundForm & Function 1998 Version

14. Glazing Acoustical Performance Airspace Insulating Glass
STC 42
STC 40
STC 37
STC 32

15. Glazing Acoustical Performance Laminated Glass
Using an interlayer in between 2 panes of glass (laminated glass) can create damping effect.
Applications Module: SoundForm & Function 1998 Version

16. Glazing Acoustical Performance Laminated Glass
Damping Performance from Interlayer
STC 34
STC 32
Critical Frequency Dip
Applications Module: SoundForm & Function 1998 Version

17. Glazing Acoustical Performance Double Laminated Insulating Glass
STC 44
STC 42
Applications Module: SoundForm & Function 1998 Version

18. Acoustics PVB Technology
Applications Module: SoundForm & Function 1998 Version

19. Acoustics PVB Technology
PVB based interlayer with added damping properties compared to regular PVB.
Applications Module: SoundForm & Function 1998 Version

20. Acoustics PVB Technology
similar safety and impact performance compared to regular PVB of same thickness.
added acoustic damping properties, enabling better sound insulating performance.
no special handling & processing required from lamination standpoint.
Applications Module: SoundForm & Function 1998 Version

21. Acoustics PVB Technology Sound Transmission Loss (6mm)
STC 35
STC 34
STC 32
Applications Module: SoundForm & Function 1998 Version

22. Automotive Adoptions Mercury Milan Mercedes S Class Ford F150 Platinum
Ford Focus
Buick Enclave
Buick Lacrosse
Ford Taurus
Applications Module: SoundForm & Function 1998 Version

23. Summary Sound is pressure wave in air.
Human ear is sensitive to sound in range of Hz & respond is not linear
Acoustic performance of glazing can be expressed by TL spectrum or single value rating.
Acoustical performance of glazing can be improved by increasing glass thickness, air-space or using damping interlayer.
Acoustic PVB uses tri-layer technology to further improve acoustic performance of glazing while maintaining the requirements of safety glass.
Applications Module: SoundForm & Function 1998 Version

24. Thank You www.saflex.com
Applications Module: SoundForm & Function 1998 Version