Soundproofing *, Soundproofing * Materials & Acoustic Insulation
...50-5000 Hz frequency range when used with Norsonic dodecahedron loudspeakers types Nor250 or Nor270 Applications Sound insulation measurements Reverberation time measurements Absorption coefficient measurements Norsonic Nor130 Sound Level Meter The Nor130 Series of Sound Level Meters are designed and manufactured to the latest sound level meter... See #2.
Lang Fang Jiuhua Fiberglass Window Screening Co. Ltd.
...11835-1998 Thermal Conductivity Coefficient w/m.k 0.038-0.06 GB/T 10294-1988 Hydrophobicity % ¡Ý98.2 GB/T 10299-1988 Humidity Absorption Property % ¡Ü5 GB/T 16401-1986 Sound Absorption Coefficient ¡¡ 1.03 product reverberation deciding method 24kg/m32000HZ GBJ 47-83 Slag Globule Content % ¡Ü0.3 ¡¡ Centrifugal Glass Wool Board Centrifugal glass... See #3.
INET FAQ
...or ducting) which helps to reduce "re-raditaion" effects. » Reduces structure-borne noise transmission when used as isolation pads. This chart shows the acoustic absorption coefficient for ArmaSound 240 measured at different thickness[1]. 1. Measured in accordance with the ISO 354 measurement standard at the School of Acoustics and... See #4.
Ecophon Acoustic Ceilings - Focus? D
...INSULATION: CAC=25 dB according to ASTM E 1414 and evaluation according to ASTM E 413. SOUND PRIVACY: AC(1.5)=180 according to ASTM E 1111 and E 1110. ? p Practical sound absorption coefficient Frequency, Hz ? Ecophon Focus D 400 mm o.d.s. --- Ecophon Focus D 60 mm o.d.s. o.d.s = overall depth of system Product Focus D O.d.s. mm 400 200 75... See #5.
Young Block Company
The effectiveness of the absorption method is dependent on the ability of the room surfaces to absorb the noise rather than reflect it. Sound Absorption Coefficient (SAC) is an indication of the sound absorbing efficiency of a surface. The Noise Reduction Coefficient (NRC) is the average SAC taken at our different frequencies. See #6.
| 
