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Acoustic PVB Technology Extending the Frontiers of Performance Glazing.

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Presentation on theme: "Acoustic PVB Technology Extending the Frontiers of Performance Glazing."— Presentation transcript:

1 Acoustic PVB Technology Extending the Frontiers of Performance Glazing

2 2 Topics Introduction to sound Basic principles of acoustics Glazing acoustical performance Acoustic PVB technology Summary

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

4 4 Human Audio Capability Human ear is sensitive to sound in range of Hz Hearing range20 – 20k Hz Most sensitive hearing500 – 8k Hz Human voice range100 – 8k Hz Key voice range for conversation 2k – 6k Hz

5 5 Threshold of Hearing Most sensitive

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

7 7 Sound Transmission Loss Spectrum (eg. : Monolithic Glass) Critical Frequency Dip

8 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

9 9 Glazing Acoustical Performance Various types of glazing configurations : Multi-ply Laminated Insulating Double Laminated Insulating Monolithic Laminated

10 10 Glazing Acoustical Performance The three basic features –Glass thickness –Insulating glass air space thickness –Interlayer damping Glass Spacer Interlayer

11 11 Increase in glass thickness will increase sound insulation performance Highest STC for readily available glass is ~37 (for 12 mm glass) Glazing Acoustical Performance Increasing Glass Thickness

12 12 Glazing Acoustical Performance Increasing Glass Thickness STC 29 STC 32 STC 35 STC 37

13 13 Creating an air space between two panes of glass also increase sound isolation performance Usually is most effective for an air space thickness >12mm Glazing Acoustical Performance Airspace Insulating Glass

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

15 15 Using an interlayer in between 2 panes of glass (laminated glass) can create damping effect. Glazing Acoustical Performance Laminated Glass

16 16 Glazing Acoustical Performance Laminated Glass STC 34 STC 32 Critical Frequency Dip Damping Performance from Interlayer

17 17 Glazing Acoustical Performance Double Laminated Insulating Glass STC 44 STC 42

18 18 Acoustics PVB Technology

19 19 PVB based interlayer with added damping properties compared to regular PVB. Acoustics PVB Technology

20 20 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. Acoustics PVB Technology

21 21 Acoustics PVB Technology Sound Transmission Loss (6mm) STC 34 STC 32 STC 35

22 22 Ford Focus Mercury Milan Buick Enclave Buick Lacrosse Ford Taurus Mercedes S Class Automotive Adoptions Ford F150 Platinum

23 23 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. Summary

24 24 Thank You


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