Rockinsul Acoustic 6* ROCKINSUL Acoustic 6 is mineral wool fiber insulation made from basalt rock: it is noncombustible with excellent fire resistance properties. ROCKINSUL Acoustic 6 is a suitable product for Partition wall, Vertical applications with excellent acoustical and thermal properties. Products Available Size L x W (mm) : 1000 X 600 Thickness (mm) : 40 - 120 Other sizes are available upon request Thickness Tolerance : - 2mm; + 3mm Acoustic Performance ROCKINSUL Acoustic 6 achieve excellent acoustic performances (sound absorption coefficients, sound insulation, and impact sound isolation) when tested in accordance to various relevant ASTM standards. Acoustic 6 achieve Noise Reduction Coefficient (NRC) values up to 1.05, when tested in accordance to ASTM C423. Product features *Non Combustible without facing : products classified in highest European fire class A1 According EN13501-1 * High shear and tensile strength * Excellent acoustic properties with sound absorbing properties * Chemically inert, mold resistance and corrosion resistance Excellent durability * Non-hygroscopic * Does not produce smoke & toxic gases in case of fire * Environment friendly and helps in greenhouse effect How to use Rail of suitable thicknesses is fixed on the floor and on the ceiling, metal studs are fixed horizontal on the rail at 600 oc centers. One or two layers of Gypsum Board of specified thickness as per requirement are fixed on one side. ROCKINSUL Acoustic 6 of specified thickness is installed between the studs. One or two layers of Gypsum Board of specified thickness as per requirement are fixed on other side. Required STC Partition wall construction details 45 One 15mm thick gypsumboard + 75mm thick Acoustic6 + One 15mm thick gypsum board 50 One 15mm thick gypsumboard + 100mm thick Acoustic6 + One 15mm thick gypsum board * Non-standardized sizes and facing may be available on reques Acoustic Insulation As commonly defined, Noise is a sound that is loud or unpleasant or that causes disturbance. Sound is measured in a unit called the 'decibel' (dB). Our hearing range starts at 10 decibels (dB) and is considered safe up to 70 dB. Any prolonged exposure of sound of around 90 dB will lead to permanent damage to human ears. Extensive destruction and pain to the auditory nerves occurs at 140 dB. and destruction and persistent ringing in ears will occur immediately at 150-160 dB. There are two types noise control in buildings. Air Born Sound - sound coming from air when the sound is produced directly to the air, like speech, sound from radio, TV, airplane. Structure born are the sounds created when someone walks on a floor close to the flat, objects falling on the floor, house hold appliances etc. Reverberation time is the time taken for the sound pressure level to drop by 60 dB after the generated noise has been stopped. Areas with a long reverberation time are referred to as being 'live', e.g. cathedrals and churches. Those with a short reverberation time are referred to as being 'dead', e.g. offices with thick carpets and absorbent ceilings. A reduction of 60 dB in the sound pressure level is equivalent to the reduction of acoustic energy by a factor of one million. As a rough guide, the reverberation time of a room is approximately equal to the time it takes for loud clapping to become inaudible. STC (Sound Transmission Class) value is a single number rating to specify the reduction in sound levels that the partition provides. The sound transmission loss performance of a partition is measured using ASTM E 90 "Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements" and calculated according to ASTM E 413 "Classification for Rating Sound Insulation." As a general rule, the higher the STC rating, the better the partition's acoustical performance. Ceiling Attenuation Class (CAC) ratings are used to determine the sound transmission loss through an acoustical or dropped ceiling. A CAC rating is determined by ASTM test method E 1414 "Standard Test Method for Airborne Sound Attenuation Between Rooms Sharing a Common Ceiling Plenum" and provides a value that is equivalent to an STC value An IIC (Impact Isolation Class) rating describes the impact noise that is transmitted through a floor/ceiling assembly. The rating is determined by ASTM E 492 "Standard Test Method for Laboratory Measurement of Impact Sound transmission Through Floor-Ceiling Assemblies Using the Tapping Machine." High ratings indicate that impact noise is reduced substantially. Resilient channels are strips of metal with an offset that spaces the drywall approximately ½" away from the framing. They are typically installed 24 inches on center perpendicular to the studs. The use of resilient channels dramatically reduces the amount of sound that is conducted though the structure. Q: Are there advantages to using steel studs over wood studs? Twenty five gauge steel studs provide superior sound control performance to wood studs with the same dimensions. The flexibility of the studs allows the partition to provide performance equivalent to a wood stud construction with resilient channels.