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Acoustic Doors & Decibel Ratings

Jul 15, 2020

Acoustic doors stop noise escaping from or getting into a room. An acoustic door will not block the noise out completely, but they are cam withstand a specific level of decibel and will block much of the required noise. Acoustic door specs can be particularly important within some industries, mainly education, healthcare and industrial.


Rw – The ‘Weighted Sound Reduction Index’ is used to measure noise reduction. It shows the difference between the sound intensity hitting one side of a structure and the resulting sound measured on the other side.

dB – The measurement for sound is Decibel. The Decibel (dB), is a unit expressing the ratio between power and intensity. The intensity of sound follows an inverse square law from its source. For example, if you double the distance from a source of sound the intensity will be reduced by a factor of four. A sound 10 times more powerful than near total silence (0 dB) will be recorded at 10 dB, but a sound 100 times more powerful than near silence will be recorded at 20 dB.


It is important to have an idea of the different levels of dB in everyday life and how they compare.

  • Near total silence is recorded at 0 dB
  • A whisper from a few metres away is 15 dB
  • A conversation at normal volume is recorded at 60 dB
  • A car horn at 110 dB
  • A aeroplane engine at 120 dB

 Acoustic doors do not need to be bland. Stemko offer a wide range of bespoke made to order doorsets in all kinds of designs and colours. Timber doors that are non-fire rated can reach an acoustic rating of 45Db, fire rated doors are a little more limited, however, Steel doors can reach a higher rating of over 50DB!

For more information on our own range of acoustic doors, speak to our team today 

020 33010546 or email us hello@stemkogroup.com