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Acoustic Doors

Robust Acoustic Doors are designed to reduce the transference of noise from one area to another.

Acoustic doors are used in many applications to offer privacy or to reduce noise pollution from one area to another. More stringent legislation makes it a requirement to consider the effects of noise pollution on the local environment. Our standard FD and FD-A doors offer a low level of acoustic performance but for higher acoustic performance we custom manufacture doors tested to 35dB, 45dB and 50dB.

Due to the high performance criteria of these doors, they are of a heavy duty design and are a more difficult doorset to install with tighter tolerances than our basic doors. Robust doors have been tested as full installed door systems and should be installed by trained engineers.

If installed incorrectly, the acoustic performance of the door could be reduced significantly, for example, a 5mm gap at the bottom of a door capable of reducing sound transmission by 45dB would result in an overall sound reduction of only 25dB. In other words, 250 times as much sound energy is transmitted underneath the door as through the door.

How Acoustic Performance is Measured

The performance of Robust Acoustic Doors is described as the 'Sound Reduction Index' and is shown as a figure in dBs. It is a weighted average over a range of frequencies prescribed in the BS EN ISO 140-3:1995 standard.

Type dBs Performance Description
FD*  22  Minimal Speech clearly audible
FD-A*  25  Average
Normal speech understood
AC35 **  35  Good Loud speech audible but not intelligible
AC45 **  45  Very Good Loud speech just detectable
AC50 **  50  Excellent Loud speech barely audible

* Standard general purpose door
** Specific acoustic door

For full details on our Acoustic Doors, please click here to view the associated datasheets.

AC 35

The AC35 doorset provides a reduction in acoustic transfer through the door of 35 dB, a level at which loud speech is aud...

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AC 45

The AC45 doorset provides a reduction in acoustic transfer through the door of 45 dB, a level at which loud speech is jus...

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AC 50

The AC50 doorset provides a reduction in acoustic transfer through the door of 50 dB, a level at which loud speech is ba...

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