DAMPA Silent Board (English) - Catalog - Page 19
E X A M PL ES OF SOUND M E ASUR M EN TS
Graph Sheet 2
acoustical needs in a room, before and after
Laboratory measurement of sound absorption according to
EN ISO 354:2003
it is put into use.
Client:
DAMPA ApS, Højeløkkevej 4 A, 5690 Tommerup, Denmark
Date of test:
7 January 2021
have established a reverberation chamber
Test specimen:
Silent Board with 40 mm mineral wool
on our factory.
Construction
height:
55 mm (Type A mounting)
We use Brüel & Kjær sound equipment
Test area:
Room volume:
Room surface:
10.8 m²
215 m³
305 m²
To ensure our solution's acoustical effect, we
(B&K 2250) to achieve indicating data about
the reverberation time of our acoustic subjects
according to EN ISO 354 and EN ISO 11654
modified before the data is accredited.
Based on these data, the absorption
coefficient is determined by using
Sabine's formula.
Frequency
f
[Hz]
125
250
500
1000
2000
4000
1.0
Absorption coefficient
With acoustic data, it is possible to calculate
αp
0.20
0.75
0.95
0.95
1.00
1.00
0.8
0.6
0.4
0.2
0.0
125
250
500
1000
2000
4000
Frequency, f [Hz]
Practical absorption coefficient, weighted absorption coefficient and absorption class according to EN
ISO 11654:1997:
w = 0.95
Absorption coefficient
DAMPA® Silent Board 600x1200 mm
with 40 mm acoustic insert.
Absorption class: A
FORCE Technology, 13 January 2021
Michelle Herlufsen
Acoustics, Noise and Vibrations
Accredited data from Force Technology, DANAK 100/2619.
P R O D U C T I N F O R M AT I O N
120-36725 / DANAK no. 100/2619
Page 10 of 13
DAMPA® Silent Board WHITE
Surface:
White, lacquered
Perforation: Special
Acoustic felt: White
DAMPA® Silent Board VELVET
Surface:
Bronzed
Perforation: Standard, 4 mm
Acoustic felt: Black
DAMPA® Silent Board WHITE
Surface:
White, lacquered
Perforation: Special
Acoustic felt: White
DAMPA® Silent Board BLACK
Surface:
Black, lacquered
Perforation: Special
Acoustic felt: Black
DAMPA® Silent Board RUST
Surface:
Corroded steel
Perforation: 8 mm
Acoustic felt: Black
DAMPA® Silent Board RAW
Surface:
Oxidized
Perforation: Standard, 4 mm
Acoustic felt: Black and white
DAMPA® Silent Board RAW
Surface:
Oxidized
galvanized steel
Perforation: Special
Acoustic felt: Black
DAMPA® Silent Board RUST
Surface:
Corroded steel
Perforation: Special
Acoustic felt: Black
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