Sound absorption coefficient ISO 354 Measurement of sound absorption in reverberation rooms

Transcription

1 Test specimen: Fabric type Sonic, art.-no , fabric type Sonic, article no material 94 % PES CS, 6 % PES area specific mass m" = 175 g/m² airflow resistance Rs = 484 Pa s/m thickness d = 7 mm one web B x H = 7.00 m x 3.00 m test surface width x height = 3.50 m x 2.95 m (starting at the lower edge of the metal rail) \\s-muc-fs01\allefirmen\m\proj\146\m146189\m146189_05_pbe_1d.docx : Size: m² Date of test: Equivalent sound absorption area less than m² according to ISO 354 Practical sound absorption coefficient according to ISO α w = 0.75 (H) without specimen with specimen Noise Reduction Coefficient NRC = 0.70 Sound Absorption Average SAA = 0.73 No. of test report M146189/5 Bau4(v1,11,60,0) - R:\BAU\Pruefst\Bau4Data\146\146189\ en\146189_ en_1.mb4:

2 Test specimen: Fabric type Sana, art.-no , fabric type Sana, article no material 61 % PES CS, 39 % PES area specific mass m" = 167 g/m² airflow resistance Rs = 578 Pa s/m thickness d = 4 mm one web B x H = 6.97 m x 3.02 m test surface width x height = 3.49 m x 2.97 m (starting at the lower edge of the metal rail) Size: m² Date of test: \\s-muc-fs01\allefirmen\m\proj\146\m146189\m146189_02_pbe_1d.docx : Equivalent sound absorption area less than m² according to ISO 354 Practical sound absorption coefficient according to ISO α w = 5 (H) without specimen with specimen Noise Reduction Coefficient NRC = 0.70 Sound Absorption Average SAA = 0.71 No. of test report M146189/2 Bau4(v1,11,60,0) - R:\BAU\Pruefst\Bau4Data\146\146189\ en\146189_ en_5.mb4:

3 Test specimen: Fabric type Solice, art.-no , fabric type Solice, art.-no material 51 % PES CS, 49 % PES area specific mass m" = 261 g/m² airflow resistance Rs = 482 Pa s/m thickness d = 0.56 mm curtain arrangement following type G-100 acc. to EN ISO 354, without enclosing frame folded arrangement (100 % fabric addition), 100 mm clear distance to the reflective wall one web B x H = 6.98 m x 3.03 m fixed directly underneath the ceiling on a metal rail (h = 50 mm) test surface width x height = 3.49 m x 2.98 m (starting at the lower edge of the metal rail) Size: 10 m² Date of test: \\s-muc-fs01\allefirmen\m\proj\146\m146189\m146189_04_pbe_1d.docx : Equivalent sound absorption area less than m² according to ISO 354 Practical sound absorption coefficient according to ISO α w = 0.75 (H) without specimen with specimen Noise Reduction Coefficient NRC = 0.75 Sound Absorption Average SAA = 0.76 No. of test report M146189/4 Bau4(v1,11,60,0) - R:\BAU\Pruefst\Bau4Data\146\146189\ en\146189_ en_7.mb4:

4 Test specimen: Fabric type Silence, art.-no , fabric type Silence, article no material 91 % PES CS, 9 % PES area specific mass m" = 105 g/m² airflow resistance Rs = 332 Pa s/m thickness d = 5 mm one web B x H = 7.00 m x 3.00 m test surface width x height = 3.50 m x 2.95 m (starting at the lower edge of the metal rail) Size: m² Date of test: \\s-muc-fs01\allefirmen\m\proj\146\m146189\m146189_03_pbe_1d.docx : Equivalent sound absorption area less than m² according to ISO 354 Practical sound absorption coefficient according to ISO α w = 5 (H) without specimen with specimen Noise Reduction Coefficient NRC = 0 Sound Absorption Average SAA = 1 No. of test report M146189/3 Bau4(v1,11,60,0) - R:\BAU\Pruefst\Bau4Data\146\146189\ en\146189_ en_3.mb4:

5 Zimmer + Rohde GmbH Zimmersmühlenweg 14-18, Oberursel, Germany Test specimen: Fabric type Mute, art.-no curtain fabric type Mute, article no area specific mass m" = 81 g/m² (acc. to manufacturer's information) airflow resistance Rs = 23 Pa s/m thickness t = 6 mm curtain arrangement following type G-100 acc. to EN ISO 354, without enclosing frame folded arrangement (100 % fabric addition) 100 mm clear distance to the reflective wall five webs each W x H = 1.40 m x 3.00 m, webs jointed with 20 mm overlap fixed directly underneath the ceiling on a 50 mm high metal rail test surface width x height = 3.46 m x 2.95 m (starting at the lower edge of the metal rail) \\s-muc-fs01\allefirmen\m\proj\146\m146189\m146189_01_pbe_1e.docx : Room: Reverbaration room Size: 11 m² Date of test: Equivalent sound absorption area less than m² according to ISO 354 Practical sound absorption coefficient according to ISO α w = 0.15 Sound absorption class: E without specimen with specimen Noise Reduction Coefficient NRC = 0.15 Sound Absorption Average SAA = 0.15 Planegg, No. of test report M146189/1 Appendix A Bau4(v1,11,60,0) - R:\Bau\Pruefst\Bau4Data\146\146189\ E\146189_ E_1.mb4: