stadip silence beautifully transparentnoise controlglazing...sound insulation behaviour of a...

SAINT-GOBAIN GLASS CLIMATE

Beautifullytransparent noisecontrol glazing

SGG STADIP SILENCE®

According to representative surveys,over two thirds of the UK populationfeel stressed by loud noises and fearthey may be harming their health.However, noise pollution in modernsociety continues to grow inexorably.Road traffic is noticeably intensifying,as is train and air traffic noise.Added to this is the noise from urbanexpansion. Noise from lawnmowers,stereo systems and loud conversationsare all commonplace in our lives, withquiet spaces fast becoming a rarity.

Is an escape to the countrysideour only remaining option?

Not at all, even those of us living inconurbations can lead a quiet life.Modern noise control glazing usingSGG STADIP SILENCE will reliably keepintrusive noise out, providing thetranquillity essential for working,living and enabling relaxing sleep.

70% of people admit to feeling harassed by noise


The stress of noise

2 • SGG STADIP SILENCE

Insist on silence in a busy world

Why make so much noiseabout noise?

Noise really can be deafening: cars andheavy goods traffic, airplane take offs,screeching buses, all contribute to thegrowing burden of modern day noisepollution. Even if people becomeaccustomed to the permanent exposureto noise and stop perceiving it, it stillaffects the brain. The affects on healthcan include difficulties concentratingand sleeping, raised blood pressure,cardiovascular complaints, nervousdisorders and even depression.

A recent study carried out by theEuropean Heart Journal (publishedFebruary 2008) investigated the effectof environmental noise on both bloodpressure and heart rate during nighttime sleep of people living in the vicinityof four major European airports.The study found that both bloodpressure and heart rate increased inthe preceeding minutes, followingexposure to higher noise levels.These effects were comparable forboth aircraft and traffic noise.The study therefore concluded thatconsciousness is not required for soundto produce its cardiovascular effects.

Desire for health and a betterquality of life.

Noise protection is rapidly becoming atop priority. A study carried out byDucker Research asking window buyerswhat their requirements were showedthat protection from noise is right atthe top of their wish list, together withthermal insulation and also burglaryand solar protection. This is whereglazing can play an important role.Noise protection is also a legalrequirement in the workplace, in aneffort to reduce the incidences ofstress and noise related disorders.

SAINT-GOBAIN GLASS CLIMATE • 3

"Sound" describes mechanical vibrations travelling in waves at various speeds through air, water and just about any othermaterial or medium. The number of vibrations per second decides the pitch (frequency) of the sound. In simple terms thehigher the number of vibrations, the higher the pitch of the sound.

What is noise?

The term noise is derived from latin,meaning nausea and is used to describesounds which are perceived as disturbingor harmful. Noise is subjective, what oneperson finds invasive may go unnoticedby the next. In addition sounds can beperceived in very differing ways - evenif they are at the same noise level.A splashing mountain stream caneasily reach the noise level of a busyroad, but we perceive the sound ofwater as natural and calming and roadtraffic noises as massively intrusive.

Noise is composed of many sounds atvarious frequencies. The human earcan perceive sounds ranging from16-20,000Hz - or at least the ears ofyounger people can. An adult’s hearingrange shrinks with advancing age.In particular higher pitched sounds aremore penetrating than lower frequencysounds. A high pitched noise with anacoustic pressure of 80dB is henceperceived to be louder than a lowerpitched sound that is also 80dB.The so called effective noise level A,specified in dB (A), takes thisphenomenon into account.It evaluates the noise level in relationto its perceived quality.

The effects of noise

The perceived loudness of sound ismeasured in decibels, often abbreviatedto dB. The dB scale starts at thethreshold of audibility with 0 dB (A) andeven with a value as low as 75 dB (A)there is a risk of noise deafness.Depending upon the duration of theexposure, the auditory pain threshold isreached from approximately 120 dB (A).

The sound pressure level, measured indB (A) doesn’t proceed in a linearfashion, but on a logarithmic scaleinstead, see example.

Understanding sound



Rock Concert

Jet

Faint Medium High Disturbing Harming

Sound Perfection

Library

Quiet Forest

Conversation

Traffic

Thresholdof Pain

If two cars each produce 80dB, their joint noise levelis not 160 dB, rather it is 83dB.

Sound pressure level ata distance of 7m

Sou

ndIn

tensity

Sou

ndIn

tensity

Sound Pressure [dB (A)]


Sound pressure levels above 90dB and upwards can beclassed as irritating to the person experiencing them.


Rw - the measuring unit forsound insulation

The measuring unit for thesound insulation behaviour ofa building component is Rw.This value is merely an averagesimplifying mutual comparisonof various building components.The ears sensitivity to soundvolumes in relation to theirfrequency pitch can only be takeninto account with the airbornesound insulation index Rw.Here the spectrum adjustmentfactors C and Ct adjust theaverage. For sound wavesfeaturing high frequencies,the factor C needs to be addedto the Rw value. For lowerfrequencies, factor Ctr needs tobe added. The acoustic behaviourof a building component is hencedefined in Rw (C, Ctr). A buildingcomponent with the valuesRw (C, Ctr) = 40 (-2, -8)provides an average insulationperformance of 40dB. For higherpitched sounds the soundinsulation is lessened by 2dBand for lower pitched soundsources it is lessened by 8dB.

Higher sound insulation factors can be achieved by increasing the thickness of the glazing and ensuring it isasymetrical. The frequency response curves of two panes combined to form a mass-spring system in insulatingglass add up to better sound insulation.

Reflection Absorption Transmission Increasing the mass Mass spring principle

Sound Transmission Noise Reduction

Understanding sound insulation

Effective sound insulation provideslower decibel ratings, resulting inreduced noise levels.

When a sound wave hits a buildingcomponent, part of the wave is reflected,another part is absorbed, and the resttravels right through the component tothe other side. Sound is thereforedampened by sound waves being metwith resistance. The sound proofingprovided by a building component isdefined as its sound insulation factor Rin decibel. This value represents thereduction in noise level provided.

Sound insulation of windows

Non transparent external wall elementssuch as masonry, usually provide a goodlevel of noise protection. However withwindows, its a different story; effectivenoise protection becomes the result ofan optional combination of frame profile,glass and installation type. This calls forspecial sound absorbing glass panes thatwill effectively keep out undesirablenoises. If the glazing is to provide ahigh level of noise control, a detailedknowledge of the respective soundsource is also critical. Noise controlglazing such as SGG STADIP SILENCEtherefore takes into account individualrequirements with respect to the: typeof sound, the level of sound insulationrequired, installation location andinstallation thickness.

What turns standard glass intosound insulating glass?

The greater the weight, the better thesound insulation provided. In simpleterms the thicker the glass the betterthe acoustic insulation. In the case ofa double glazed unit the two panes ofglass are seprated by a cavity, the gasin this cavity dampens the vibrationsof the the first pane before they canreach the second one. This helps toreduce both the level of vibration andthe amount of sound transmitted.Higher sound insulation factors can beachieved by increasing the thickness ofthe glazing and ensuring it is asymetrical.The frequency response curves of twopanes combined to form a mass-springsystem in insulating glass add up tobetter sound insulation. An acousticlaminated glass such as SGG STADIPSILENCE contains a film interlayer thathas a special dampening viscoplasticcore helping to further reduce thetransmission of sound.

Optimised sound insulation can beachieved by combining two panes ofglass with a soft material (PVB).SGG STADIP SILENCE contains a 3-plyinterlayer with a special noisedampening core, providing excellentacoustic attenuation.

The Advantage?

The patented acoustic film used inSGG STADIP SILENCE acts as a dampenerpreventing the glass panes fromresonating with each other and ensuringan even sound insulation across theentire frequency range. In addition toits excellent acoustic properties,SGG STADIP SILENCE also providesprotection against injury and thehighest safety levels required for safetycritical areas, over head glazing beingone such example.

Less is more…

SGG STADIP SILENCE levels outintrusive frequencies

Each building component has its owncritical sound frequency (resonantfrequency) that will cause it to vibratespontaneously. Any componentconsequently provides inadequateinsulation against noises at this specificfrequency. With two panes of glass ina double-glazed unit this vibration isheightened. Although this effect can bereduced by using panes of differentthicknesses, it cannot be preventedentirely. SGG STADIP SILENCE suppressesthe intrusion of sound waves aroundthe critical frequency of the glass, be ita single pane or a double-glazed unit.In a double glazed unit, SGG STADIPSILENCE achieves an airborne soundinsulation index value of up to 54dBand hence absolutely keeps thepromise implied by its name.

The silence effect


Silence is simple


8.4mm SGG STADIP SILENCE8mm monolithic glass

Performance of SGG STADIP SILENCE in adouble-glazed unit.

Elements ofSGG STADIP SILENCE

SGG STADIP SILENCE,laminated safety glass

Sou

ndIn

sulation

(dB)

Silence Interlayer

The advantages ofSGG STADIP SILENCE at a glance:

• Excellent levels of sound insulationwithout the need for thick,heavy glass

• Even sound insulation across theentire frequency range.

• Distortion free transparency• All the safety and secruity

properties associated withstandard laminated glass

• Available in sizes up to6000mm x 3210mm for theproduction of large panes ofinsulating glass


Technical Specifications

RW in dB C Ctr Type Thickness

35 0 -3 SGG STADIP SILENCE 6.4 6 mm

37 -1 -3 SGG STADIP SILENCE 8.4 8 mm







Frequency (Hz)

WithoutSGG STADIP SILENCE

With one layer ofSGG STADIP SILENCE

With two layers ofSGG STADIP SILENCE

Effectiveness of SGG STADIP SILENCE in a double-glazed unit.

SGG STADIP SILENCE is equally suitable for both internal and external use.

Applications

• Glass façades and windowsSGG STADIP SILENCE significantlyreduces the effect of exterior noise inbuildings situated near noisy locationssuch as busy streets or airports.

• Internal PartitionsIn the case of internal partitions,SGG STADIP SILENCE impresses with itshigh security attributes. Depending onits thickness, a single pane ofSGG STADIP SILENCE can dampen thesound to 47 dB. In a double layerconstruction, sound insulation valuesfar exceeding 50dB are possible.In addition, SGG STADIP SILENCE alsoprovides numerous opportunities forcreative designs and personalisation.

• Overhead glazingOverhead glazing is an architecturallyattractive design element in atria andpassages but also in more privateareas such as conservatories.Overhead glazing can be an intrusivesource of noise itself through rain orhail landing on the glazing.SGG STADIP SILENCE raises the soundinsulation factor by up to 13dB!In addition, SGG STADIP SILENCE alsoprovides splinter adhesion in case ofbreakage and, with a film thicknessof >0.76mm, meets the necessaryrequirements for overhead glazing.

FunctionImpact Safety

Overhead Glazing

Safety Glazing

Anti Bandit

Safety Functions

Sound Insulation Values (single-glazed)

StandardBS EN 12600

BS 5516

BS 6262BS 6180

BS EN 356

Part

1 & 2

44


Combining sound insulation with other functions

• Thermal InsulationBy incorporating SGG PLANITHERM, heatloss can be reduced by up to 70% incomparison with standard float glass,The warmth is distributed evenly,eliminating cold spots. The result isgreater comfort combined with anoticeable reduction in heating costs.

• SafetySGG STADIP SILENCE provides all thesafety features traditionally associatedwith laminated glass. Even morestringent safety requirements can alsobe achieved for those who require anextra level of protection. For thesecases, special anti-bandit and anti-theftglass configurations are available fromSaint-Gobain.

• Solar ProtectionSGG COOL-LITE glazing filters thesunlight and helps to prevent excessiveheat build up, ensuring a balanced,comfortable room temperature.Solar control glazing can also significantlyreduce energy bills by reducing theneed for costly air conditioning.

• Self-cleaningIdeal for roofs or any difficult ordangerous to reach areas. SGG BIOCLEANharnesses natures elements to keepwindows cleaner for longer! A specialcoating ensures that organic dirt willsimply break down and be washedaway by the rain helping glass staycleaner for longer.

• Fire protectionSaint-Gobain manufactures special fireprotection safety glazing that inhibitsheat development and the spread ofsmoke or flames. This glazing can beused both internally and externally.

Distributor

SGG BIOCLEAN, SGG COOL-LITE, SGG DECORGLASS, SGG MASTERGLASS, SGG PLANILUX, SGG PLANITHERM,SGG SATINOVO, SGG STADIP, SGG STADIP PROTECT, SGG STADIP SILENCE and all other devices and logosare registered trademarks of Saint-Gobain.

Saint-Gobain Glass UK LtdWeeland Road, EggboroughEast Riding of Yorkshire, DN14 0FD, UK

www.saint-gobain-glass.com

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