Acoustic Acoustic EN 717-1 : Rw (C ; Ctr) dB (A) 36(-1 ; -2) to 55 (-2 ; -7)

Heinen doors are the preferred option for acoustics specialists owing to their impressive acoustic test results (up to -55 dB!).

Confidentiality, respect for privacy and working conditions are all elements which now require an environment where sound pollution must be limited. The aim is to improve the corporate image, reduce the incidence of work-related illness and make the workplace more attractive.
This is why Heinen has deployed its skills for the benefit of its customers such as leisure centres, telecommunications companies, theatres, industrial companies, test centres, etc. Our customers want real soundproof doors that are easy to use and look good at the same time.

This is what Heinen had in mind when it developed its famous soundproof doors: 7cm thick, ultra-thin or collapsible doorsills to enable heavy traffic to pass through easily and comfortably.

In addition, Heinen took care to ensure that the acoustic properties of its doors can be combined with other performance features (fire resistance, burglary resistance, etc.).

Standards table

European standards EN ISO 717-1
EN ISO 140-1
Symbols A
Resistance class According to declared values: Rw (C; Ctr) (dB)
Soundproofing performance featureResistance class
Heinen		 Single doors: Rw 36 to 55 (glazing OK)
Double doors: Rw 44 to 53

European Acoustic standards EN ISO 717-1

Acoustic insulation of a wall

The R index, the calculation of which has been harmonised by standard EN ISO 717-1, relates to the acoustic quality of a wall. This refers to the difficulty it has in transmitting airborne noise. It is measured solely in the laboratory and only takes into account direct transmission (ignoring lateral transmission!). R is expressed in dB(A). It is measured across the whole spectrum from 100 to 4000 Hz.

The basic curve (in blue) is shifted dB by dB until the sum of the unfavourable values (pink dots beneath the green curve) is as high as possible, but lower than 10 dB across five octave bands (32 across 16 third octaves).

The Rw value of the wall is 500 Hz on the shifted curve (green).

In the example shown in the graph opposite, the Rw value = 40 dB(A).

Two Rw adaptation indexes have been created to take into account the properties of the noise source:

 

  • C This is the adjustment for noise sources containing few low frequencies (fast road traffic, children playing, daily activities, etc.).
  • CtrThis is the adjustment for noise sources containing many low frequencies (urban traffic, long-haul aircraft, discotheques, etc.)

The sound reduction index R of a partition / door therefore in fact comprises three terms and is expressed as follows: Rw (C; Ctr)

 

Example: a partition is assessed at Rw (C; Ctr) = 37(-1; -3)

This means that the weighted reduction index is 37.

For purposes of insulation against the noise of urban traffic, Ctr adjusts the sound insulation downwards to 34dB and in the case of fast motorway traffic, C adjusts the sound insulation downwards to 36dB.

If the type of noise is known from the outset (noise analysis), Heinen can adapt a door to ensure that the downward C or Ctr adjustment is minimal. For example, doors for a discotheque with a lot of low frequencies.

Valeurs caractéristiques de l'isolation acoustique Graphique

Need more informations?