Sounds good.

Good room acoustics reduce the reverberation time and improve the speech intelligibility. This is very important in not just classrooms, restaurants or working rooms but also in service counter areas and sports halls. LIGNATUR acoustic ceilings turn any room into a concert hall. The latest developments show that more and more clients are using acoustic ceilings in living rooms too. On the one hand, because these greatly increase the quality of living, and on the other, because the ceilings are aesthetically pleasing and can be harmoniously matched to the room geometry and installations.

Setpoint of reverberation time

The reverberation time T(s) is the period of time it takes for a signal in a room to drop by 60dB. The value aimed for the reverberation time (Tsoll) at average frequencies depending on the kind of usage and the effective volume of space V can be seen on the picture to the left.

A1: Music
A2: Language
A3: Teaching/communication
A4: Teaching/communication inclusive
A5: Sports

T = 0.163 ⋅ V / A
T (s) = reverberation time
V (m3) = volume of space in total
A (m2) = equivalent sound absorption surface

The equivalent sound absorption surface A (m2) equals the sum of the partial surfaces multiplied with their known sound absorption coefficientαai (-) plus the sound absorption of objects respectively the persons within the space.

[Translate to Englisch:] Verteilung von Schallabsorptionsflächen

LIGNATUR elements with bore holes or slits and installed sound absorption panels can be used as acoustic elements. Please refer to the following diagrams for the statistical sound absorption coefficients achieved with LIGNATUR acoustic elements, measured as per DIN EN ISO 354.

The absorbing surfaces have to be distributed evenly to the overall surface. Examples of correct distributions are shown here.

We are happy to test the fulfilment of required acoustic quality for the spaces you planned according to DIN 18041 when using LIGNATUR acoustic elements.

Sound sample reverberation

Reverberation, the sound you can hear after a specific sound has already been heard. The basketball throwing example in a threefold sports hall with a concrete ceiling shows that 12-second reverberation is irritating.

The required time is 2 seconds.

Listen to more examples to hear how much sound Lignatur acoustic ceilings really absorb. Use high-quality speakers or headphones.

Sound sample sports hall – basketball throw

Hear the difference in a threefold sports hall with and without acoustics.

Sound sample sports hall without acoustics

Reverberation time: 12 seconds

Sound sample without acoustics

Reverberation time: 1.86 seconds

Sound sample classroom – teacher

Hear the difference in a classroom with and without acoustics.

Sound sample without acoustics

Reverberation time 1.86 seconds

Sound sample with acoustics

Reverberation time 0.57 seconds

Sound sample living room – housewife

Listen to the examples in the living room with and without acoustics to hear the difference.

Sound sample without acoustics

Reverberation time 1.22 seconds

Sound sample with acoustics

Reverberation time 0.43 seconds

Dynamic room accoustics

Combining function with style – putting good room acoustics into optical harmony with the architecture. This was the main goal behind the development of the dynamic, nonrepetitive pattern. Inspired by architectural design ideas, coached by «meierei Innenarchitektur» in Munich, the result is a dynamic design that gives any room a whole new vitality. The intensity of the perforation can be defined by a free choice of parameters.

Blog BAU Munich: when the interior designer Dorothee Meier met the timber constructor Ralph Schläpfer, it was the perfect basis for new, individual timber construction solutions. Solutions that not only meet the highest acoustic, living climate and aesthetic requirements, but can also be implemented at low cost! From 1:55, Ralph Schläpfer presents how the dynamic design was created, inspired by architectural design ideas and coached by «meierei Innenarchitektur».

Acoustics type 1

Slit size: 20/250 mm
Grid: 81/400 mm

αw = 0.55
Sound absorption class: D

Acoustics type 2

Hole diameter: 30 mm
Grid: 81/75 mm

αw = 0.50
Sound absorption class: D

Acoustics type 3

Hole diameter: 20 mm
Grid: 40/40 mm

αw = 0.90, with additional slat αw = 0.85
Sound absorption class A, with additional slat sound absorption classe B

Acoustics type 3.1

Hole diameter: 20 mm
Grid: 40/40 mm

αw = 0.75, with additional slat αw = 0.60
Sound absorption class C, with additional slat sound absorption class C

Acoustics type 5

Hole diameter: 15 mm
Grid: 40/40 mm

αw = 0.65
Sound absorption class: C

Acoustics type 5.1

Hole diameter: 15 mm
Grid: 40/40 mm

αw = 0.50
Sound absorption class: D

Acoustics type 6

Hole diameter: 9 mm
Grid: 20/20 mm

αw = 0.80
Sound absorption class: B

Acoustics type 6.1

Hole diameter: 9 mm
Grid: 20/20 mm

αw = 0.60
Sound absorption class: C

Acoustics type 8

Slit size: 9/380 mm
Grid: 48/600 mm

αw = 0.50, with additional slat αw = 0.50 
Sound absorption class D, with additional slat sound absorption class D

Acoustics type 8.1

Slit size: 9/380 mm
Grid: 48/600 mm

αw = 0.45, with additional slat αw = 0.40 
Sound absorption class D, with additional slat sound absorption class D

Acoustics type 9

Slit size: 5.5/380 mm
Grid: 24/600 mm

αw = 0.50, with additional slat αw = 0.55 
Sound absorption class D, with additional slat sound absorption class D

Acoustics type 9.1

Slit size: 5.5/380 mm
Grid24/600 mm

αw = 0.50, with additional slat αw = 0.50 
Sound absorption class D, with additional slat sound absorption class D