Acoustic
Our tested Secured by Design double glazed units have a standard 39dB rating. The acoustic performance of NEOS doors depends largely on the type of glazing or panel that is used in the door or screen. The amount of PVB interlayer within the glass panels has a sound deadening effect, therefore; the more PVB used the better the results.
The airgap between the glass panels also influences the sound transmission values. If the door-set is single leaf or double leaf, the thresh type and overall size of the door can also have an effect on the acoustic performance. Essentially, aside from our standard 39dB, Improvements to the acoustic rating of the glazing can be sought through using triple glazing: dB’s of 42 up to 49dB can be achieved.
Below is a chart to show the relationship between the Door dB versus the change in Glass dB:
| Türe Porte Door R w.Tür dB |
Glas Verre Glass R w.Glas dB |
|
|---|---|---|
| 1 | 32 | 31 |
| 2 | 33 | 32 |
| 3 | 35 | 36 |
| 4 | 37 | 38 |
| 5 | 38 | 39 |
| 6 | 39 | 40 |
| 7 | 40 | 41 |
| 8 | 41 | 42 |
| 9 | 42 | 43 |
| 10 | 42 | 44 |
| 11 | 43 | 45 |
| 12 | 44 | 49 |
Careful consideration of the glass to be used is crucial in helping noise reduction. Laminated glass reflects the noise back towards the source and absorbs the noise energy within the glass, as image below:
Solid/Opaque Panels:
Where doors are solid (non-glazed), opaque sandwich panels can be fitted with similar sound insulation values as the glazing option. This absorbing material would be either mineral wool or plaster board material which both have excellent sound absorbing qualities.
Acoustic Louvres:
Where acoustic louvres are required, we can provide three types of louvres depending on the sound reduction that is required:
150mm deep louvre stack which offers the following values
| Frequency Hz | 63 | 125 | 250 | 500 | 1k | 2k | 4k | 8k | Rw |
|---|---|---|---|---|---|---|---|---|---|
| SRI dB | 4 | 4 | 6 | 8 | 11 | 13 | 12 | 12 | 10 |
| FaceVelocity m/s | 0.5 | 0.75 | 1 | 1.25 | 1.5 | 1.75 | 2.0 | 2.25 | 2.5 |
| Pressure Drop Pa | 3 | 7 | 12 | 19 | 27 | 36 | 48 | 60 | 74 |
| Weight | 24kg/m2 | ||||||||
| Visual Free Area * | 50% | ||||||||
| Actual Free Area | 34% | ||||||||
300 mm deep louvre stack which provides the following statistics:
| Frequency Hz | 63 | 125 | 250 | 500 | 1k | 2k | 4k | 8k | Rw |
|---|---|---|---|---|---|---|---|---|---|
| SRI dB | 05 | 06 | 07 | 12 | 18 | 21 | 16 | 15 | 18 |
| FaceVelocity m/s | 0.5 | 0.75 | 1 | 1.25 | 1.5 | 1.75 | 2.0 | 2.25 | 2.5 |
| Pressure Drop Pa | 3 | 7 | 12 | 18 | 26 | 35 | 46 | 58 | 71 |
| Weight | 41kg/m2 | ||||||||
| Visual Free Area * | 50% | ||||||||
| Actual Free Area | 34% | ||||||||
600 mm deep louvre stack which delivers these values
| Frequency Hz | 63 | 125 | 250 | 500 | 1k | 2k | 4k | 8k | Rw |
|---|---|---|---|---|---|---|---|---|---|
| SRI dB | 07 | 09 | 11 | 20 | 32 | 35 | 31 | 31 | 25 |
| FaceVelocity m/s | 0.5 | 0.75 | 1 | 1.25 | 1.5 | 1.75 | 2.0 | 2.25 | 2.5 |
| Pressure Drop Pa | 6 | 13 | 23 | 35 | 51 | 69 | 90 | 115 | 141 |
| Weight | 82kg/m2 | ||||||||
| Visual Free Area * | 50% | ||||||||
| Actual Free Area | 34% | ||||||||
Downloads
Max Sizes Certisecure document
Max Sizes Certisecure document 2
