ACOUSTIC DESIGN

Walls: Area: 81.3 SQM / approx. 876 SQ FEET Supply and fixing of Polyethylene Terephthalate made from light weight, eco-friendly, sustainable 100% polyester fibers (60% PET-recycled fiber, 40% PET-virgin fibre). The panels should be having a thickness of 10mm which is tested for the SAC (Sound Absorption Coefficient) in any third-party lab such as ARAI (Govt., of India) according to Type A mounting. The vendor should present the third-party compliance by furnishing third-party lab test reports for the product proposed and should clearly mention test details which is carried out in a National Accreditation Board for Testing and Calibration Laboratories (NABL) certified lab mentioning above test standards and should comply strict adherence with the specification. These panels should be having a density in the range of 180 - 200kg/m3, 10mm thick with FR treatment and third-party certified for ASTM C-423 to give an NRC up to 0.30 - 0.35. Minimum 10mm PET panels - prefabricated acoustic panels are to be pasted directly on to the wall using high quality adhesives in the required area.

SECONDARY LAYER ABSORBTION: AREA: 13.68 SQ M/approx. 148 SQ. FEET Supply & fixing of acoustic panels using core material of 100% polyester fibers (60% PET-recycled fiber, 40% PET-virgin fibre). The acoustic core used in these panels should have a minimum density of 120kg/m3, 40mm thick with FR treatment and should demonstrate third party compliance to for ASTM E-84 for the acoustic core when tested in any NABL certified lab. Strict adherence with the specification is to be demonstrated in the way of submitted third party test qualification. Edges of the acoustic panels should be hardened and concealed having fabric facing without any wooden or plywood strips used at the edges since it can cause termite issues in the future. The system should be fixed on the 10mm PET panels prefab acoustic panels fixed directly on the walls using z-clips. The facing side should be lined with a non-woven acoustic fleece or acoustic fabric lined which can allow the smooth flow of the sound energy at the same time should not allow any fibers, dust or shot content migration through the acoustic infill. The panels sizes are to be considered as 1200 mm X 600 mm which are placed randomly at a specific spacing spread across the left side & right-side walls. Special consideration to be done to avoid usage of any glass wool or rockwool materials inside the class to avoid any fiber migration. The product should be tested for the SAC (Sound Absorption Coefficient) in any reputed lab globally to achieve a minimum NRC of 0.95 when tested according to ASTM C423/ISO 354 standard on Type A mounting method during the random incidence test in the chamber. The core used should pass the CDPH V1.2 test standard for low VOC emissions and can contribute to LEED V4.1 EQ Credit: Low-Emitting Materials. The product should also qualify when tested according to ASTM C 1338-08 for determining the fungal resistance of insulation materials and facings. The product should also be tested for the reflectance factor according to the ASTM E1447-2017 and the supplier should be able to furnish the third-party lab test reports for all the above-mentioned test standards.

Ceiling Tiles – 44 SQM/approx. 474 SQ. FEET Supply and installation of polyester fiber acoustic ceiling tiles measuring 2ft x 2ft, flat and rigid, made from lightweight, eco-friendly, and sustainable 100% polyester fibers (60% PET-recycled fiber and 40% PET-virgin fiber). The tiles should have a minimum thickness of 15mm and be fixed onto the existing T-grid system after the removal of the current tiles on-site. The facing side of the tiles should be lined with a non-woven acoustic fleece or acoustic fabric. The acoustic core must have a minimum density of 120 kg/m³, with a 15mm thick polyester core that is FR-treated and third-party certified for ASTM E-84 fire safety compliance. The product must be tested for the Sound Absorption Coefficient (SAC) in a reputable global laboratory and achieve a Noise Reduction Coefficient (NRC) of 0.95.

Ceiling Sound Absorption Main slab – Area – 41 SQM/approx. 442 SQ. FEET Supply & fixing of acoustic pyramid shaped polyurethane foams. These panels of 600 mm X 600 mm, 32 Kg/cum density are directly placed on the ceiling using adhesives.

Ceiling Sound Absorption – Beams: Area – 29 SQM/approx. 313 SQ. FEET Supply & fixing of acoustic wedge-shaped polyurethane foams which are typically open cell structures that effectively absorbs a wide range of frequencies, especially low frequencies, which are often difficult to control. These open-cell structure allows for sound waves to penetrate and dissipate energy within the foam, reducing reverberation and noise levels. These pyramid shaped structures are engineered to absorb the widest range of frequencies. These panels of 600 mm X 600 mm, 32 Kg/cum density are directly placed on the ceiling using adhesives.

WINDOW AREA: ACOUSTIC CURTAIN OPENING LENGTH – 8MTS X 4MTS – 32SQM/approx. 345 SQ. FEET Supply & fixing of 100% polyester high-performance noise-reducing acoustic drapery designed to absorb sound. It should be constructed using multiple layers of sound-absorbing materials, having a thickness of 8 - 12 mm with larger number of frills. Vendor to submit test certificates for the properties of fabric. They also should demonstrate the technical information pertaining to the acoustic core which is going to be proposed inside the drapery as infill.

ACOUSTIC double leaf DOORS – 2 sets WITH VISION PANEL OF MIN 8 INCHES X 6 INCHES Size of the doors: 2127 mm X 1500 mm – 2 sets Supply & fixing of wooden acoustic door in Double leaf manufactured by considering the acoustic aspects. The frame is designed using solid wood with multiple layers of rubber gaskets which is considered to attain the noise reduction. The door leaf of 60 mm thickness is manufactured using layers of sound dampening membrane and custom indigenous core materials in order to block the air borne noises that travel from one face to other. The vendor should demonstrate the thirdparty compliance by furnishing third-party lab test reports for the product proposed such as compliance to ASTM E-413 and weighted sound reduction index calculated as per ISO 717-1 and should clearly mention test details which is carried out in a National Accreditation Board for Testing and Calibration Laboratories (NABL) certified lab mentioning above test standards and should comply strict adherence with the specification. The laminate finishing shades should be customizable for the Door leaf based on our requirements. The door pricing needs to be provided with all the accessories like seals, lock, door closer, hinges etc.

Control Room Wall Area - (L X B X H - 1.8 m X 1.8 m X 2.5 m) – 18 SQM/approx. 194 SQ. FEET Supply and fixing of a GI framework of 50 mm with an acoustic infill of 50 mm, 1000 GSM. The acoustic core shall consist of a minimum 1000 GSM, 50 mm thick polyester core with fireretardant (FR) treatment, and must be third-party certified for ASTM E-84 fire property compliance. The product should be tested for SAC (Sound absorbing coefficient) in any reputed global lab to achieve a minimum NRC of 0.9 when tested according to ASTM C423/ISO 354 standards using the D-40 mounting method during the random incidence test in the chamber. These polyester panels must pass the CDPH V1.2 test standard for low VOC emissions and contribute to LEED V4.1 EQ Credit: Low-Emitting Materials. The product must also qualify when tested according to ASTM C 1338-08 for determining the fungal resistance of insulation materials and facings. Additionally, the product should be tested for reflectance factor according to ASTM E1447-2017, and the supplier should be able to provide third-party lab test reports for all the aforementioned test standards. The system is to be covered with 12.5 mm thick gypsum board on both sides of the framework. As the final finish of the control room is becoming a reflective surface these areas also need to acoustically treated to achieve the required reverberation time within the room. Considering this aspect, Polyethylene Terephthalate panels are to be fixed on the gypsum wall area using adhesives. These panels are made from light weight, eco-friendly, sustainable 100% polyester fibers (60% PET-recycled fiber, 40% PET-virgin fibre). The panels should be having a thickness of 10mm which is tested for the SAC (Sound absorbing coefficient) in any third-party lab such as ARAI according to Type A mounting. The vendor should demonstrate the third-party compliance by furnishing third-party lab test reports for the product proposed and should clearly mention test details which is carried out in a National Accreditation Board for Testing and Calibration Laboratories (NABL) certified lab mentioning above test standards and should comply strict adherence with the specification. These panels should be having a density in the range of 180 - 200kg/m3, 10mm thick with Fire Retardant treatment and third-party certified for ASTM C-423 to give a Noise Reduction Coefficient (NRC) up to 0.30 - 0.35.

Control Room – Vision Window (1200 mm X 900 mm) – 1 Set Supply and installation of a vision window with dimensions of 1200 mm X 900 mm, fixed on the control room wall. The frame shall be made of solid wood with dimensions of 75 mm x 75 mm, with necessary rubber beadings. The glass should have a thickness of 12 mm. The window frame shall be covered on both sides with architraves.

Control Room – Door (2100 mm X 800 mm) – 1 Set Supply and fixing of a standard solid wood door. The door frame shall be made of solid wood with dimensions of 75 mm x 50 mm. The frame will be fixed to the wall, constructed with a gypsum framework, using an adequate number of anchor fasteners on each vertical side and the top horizontal member. The flush door leaf shall have a solid core, typically made of wood or composite material, and will be completed with a door frame, hinges, lockset, and handle, all subject to the client's approval. An architrave shall be provided to cover the joints between the frame and the wall opening.

LINOLEUM FLOORING: Area: 80 SQM/approx. 862 SQ. FEET Linoleum vinyl flooring carpet type NOT Tiles Choice of colours to confirm during installation

Miscellaneous services: Removal and shifting of existing writing board, relocating study desks, removal of existing doors etc.,

Standard warranty period one year plus two years extended warranty