ECHO-LAM®
Sound Reduction
ECHO-LAM® is an acoustic glass containing an acoustic membrane that drastically reduces noise.
Noise not only seriously affects our quality of life, work and living conditions, but also causes damage to our health. Apart from irreparable hearing damage caused by permanent noise, various other problems may occur, such as stress, nervousness and cardiovascular disorders.
In order to ensure a comfortable way of life, the assurance of a low level of noise is essential.
The unit of noise measurement is the decibel (dB). Our subjective perception of noise is subject to the following principle: If the level of noise in a room is reduced by 10 decibels in relation to the outside noise, we get the impression that it is reduced by half.
A disturbing noise spectrum consists of many frequencies of different intensity. Some frequency ranges are perceived to be louder and therefore more disturbing than others. Every source of noise has a specific frequency distribution, even if the intensity of the noise level in dB is the same. So it is important for sound insulation to particularly dampen the disturbing frequency ranges. The measures for noise protection must therefore always be determined according to the source of noise. The same noise levels might require different kinds of window constructions and sound insulating glass.
NOISE SOURCES AND PERCEPTION
The following illustration shows typical sounds with their volumes and subjectively perceived intensities.
Noise reduction glazing is based on the asymmetry of glass panes and the use of attenuation gases in the space between the panes. ECHO-LAM® glazed units can achieve the acoustic insulation factor Rw = 30 – 53 dB, depending on the type of unit. Before choosing a suitable unit, the source of noise should always be specified and other influential factors should be identified. Therefore, in all cases customers should contact us during an early planning stage, so that all specific requirements for the glass can be taken into consideration by our well qualified staff.
When defining the source of noise, we use the so-called acoustic insulation coefficient Rw and the corrective coefficients C and Ctr.
RW- is an average sound insulation value for the considered frequencies.
Ctr – corrective coefficient for sound sources containing a large number of low frequencies, for example urban road traffic.
C – corrective coefficient for sound sources containing few low frequencies, for example high speed road traffic, high speed rail traffic, children playing.
YALODOMI hold certification for sound absorbing glass with an acoustic insulation factor ranging between 31 dB and 51 dB.
