WHAT IS ACOUSTIC GLASS?

Acoustic glass is specialist glass that considerably reduces noise levels. All glass has some acoustic ability in terms of blocking outside noise – a 4mm single pane of glass has a sound reduction level of approximately 25 decimals (25db) and for a 4mm IGU with two panes of glass) this increases to around 28db. Sound levels may be reduced further in a number of ways including simply increasing the thickness of the glass being used or increasing the number of panes / distance between them within an IGU. However, the most effective way of increasing sound reduction is to use a bonded layer between two panes of glass – the bonded interlayer absorbs sound energy and prevents sound vibrations from travelling through the glass. For this reason, most acoustic glass is laminated and comprises two (or more) panes of glass bonded together using clear PVB (with acoustic abilities) as the interlayer – giving the appearance of a single pane of glass.

TECHNICAL INFORMATION: ACOUSTIC GLASS

Click on the tabs below to view technical details on Acoustic Glass.

TYPICAL ACOUSTIC GLASS USAGE

Acoustic glass has many applications and it must be used in certain circumstances to comply with Building Regulations requirements around resistance to sound. Specific provisions apply to schools – for more information see: www.gov.uk/government/publications/resistance-to-sound-approved-document-e

Acoustic glass is multifunctional from a glazing point of view and, as well as its use as a Safety Glass, it can also be combined with other usages such as within IGUs, and Glass Partitions. For some recent examples of our work with acoustic glass and the aesthetically pleasing results it can achieve please see:Hot Mill School Case Study.

Acoustic glass does not of itself have any fire resistance ability but there are certain types of Fire Rated Glass that do have acoustic ability and a sound reduction level – for more information see our FFire Rated Glass page.

FEATURES OF ACOUSTIC GLASS:

  • Improved acoustic performance
  • Sound control
  • Can be cut to size
  • Impact safety rating
  • UV protection
  • Multifunctional
Acoustic Glass
MANUFACTURER/
PRODUCT
THICKNESS
MM
INTERIOR EXTERIOR FIRE RATING CERTIFICATE No dB RATING SAFETY
RATING
ACCOUSTIC
6.8mm Acoustic 6.8 N/A N/A NFR N/A 35 1B1
8.8mm Acoustic 8.8 N/A N/A NFR N/A 37 1B1
10.8mm Acoustic 10.8 N/A N/A NFR N/A 38 1B1
12.8mm Acoustic 12.8 N/A N/A NFR N/A 40 1B1
16.8 Acoustic 16.8 N/A N/A NFR N/A 42 1B1

THE BENEFITS OF ACOUSTIC GLASS?

The main benefit of acoustic glass is the reduction in noise level – generally a comfortable sound level for humans is around 35db (day) and 30db (night).

All acoustic glass comes with a sound reduction level that is given in decimals. It is particularly useful in reducing some of the higher frequency sounds such as traffic, people and even the sound of rain falling on the glass (where the glass is used in roof glazing); different performance levels can be achieved by various combinations of glass thickness and the number of interlayers used.

From a noise level point of view a reduction of just 5db is clearly noticeable to the human ear – acoustic glass can therefore be used not only in urban areas with high-levels of traffic and other environmental noise but also in open office workplaces or schools to minimise noise disruption.

Due to its inner bonded layer, acoustic glass will hold in place in the event of breaking; meaning that it has an Impact Safety Rating and can be used in Critical Locations. It can also improve energy efficiency.