ASONA India Presentation to AES  

at Rachna Sansad on  12/07/03

There were 17 members and 17 guests present for this presentation by Asona India. First Mr. Nandu Bhende, Chairman India Section welcomed all and started the proceedings. Mr. Nemish Sheth of Asona India made a well prepared presentation about the SPRAY ON acoustical products. Following is the gist of that we have all gathered here this evening to understand and know the effects and solutions to this monstrous thing called noise pollutionNoise Indeed has been officially deemed as dangerous to health.

SOUND DEFINITION

Sound insulation is a term, often used but seldom truly understood. So it is worthy of definition. Sound may be seen as energy, which travels as waves or vibrations from its generating source outwards. Sound insulation today is quite obviously a serious consideration in any circumstance – domestic commercial or industrial.

The new generation of architects, designers and engineers conjure up with stunning creations aided with computer generated drawings and designs forgetting to consider one of the most basic tenets of the acoustical privacy.

The end result is a visual marvel with pleasant and attractive aesthetics but an acoustical disaster.

Its only when the acoustical comfort is found missing does it dawn on the design gurus to call in the acoustician. But then it too late for any modification is going to be work-disruptive and awfully expensive.

ICC A GLOBAL AUTHORITY IN THE FIELD OF AGRENOMICS

Since noise strain has turned into an international problem several international manufacturers have organized themselves to address good thermal insulation for acoustical comfort.

International Cellulose Corporation a leading player and a global leader in the field of acoustic for over 3 decades is an ISO 9002 certified company who pride to address designers the world over who have perfected to solve the many architectural sound related problems, tailored through their global network of People, Technology, and Resources.

TECHNOLOGY CONCEPT OF K-13 SYSTEM

ICC products are made of chemically treated fibre from high quality recycled paper combined with patented adhesives to provide a uniform texture.

The process used for manufacturing cellulose fiber insulation is simple. Sorted, unused newsprint is conveyor fed into a shredder where it is broken down into roughly 70mm square pieces. It then passes into a hammer mill to be further reduced after which a pneumatic conveyor carries it to a roof level cyclone which extracts any fine dust.

From the holding bin into which it is then delivered the shredded paper is fed to a final hammer mill together with a chemical formulation which give it its fire –retardant properties as well as fungus –resistant and vermin – repellant

K-13 QUITE ZONE PRODUCTS

International Cellulose Corporation has come up with a variety of quiet zone products for the management and control of sound in domestic and commercial environment and are designed to use in partitions, roofs, walls, ceilings and floors, and semi- exposed locations – such as canopies, balconies, and pedestrian tunnels,

The resulting product contains a special blend of fibres which are non-irritant, non-toxic and meet class O of the Building Regulations relating to Fire.

PERFORMANCE

They neutralize unwanted sound in three ways by blocking the sound path; by breaking the vibration path; and absorbing the sound energy.

Absorbent materials that are soft and have tiny pores through which the air has difficulty in passing and the vibration energy is dissipated as friction, thus reducing the intensity of the noise as it passes through the materials, this property is most usefully applied to prevent reverberation inside enclosure or to reduce noise transmission inside ducts.

STATUTORY APPROVALS

ICC products ensure outstanding Acoustical, Thermal and Fire performance that meet to most international standards and classifications of approvals.

DISTINCT ATRIBUTES OF K-13

1. K-13 coating is formulated to produce an unbroken textured interior finish for ceilings and walls and to provide a high degree of sound absorption across the entire frequency range.

2. attractive textured appearance make it suitable for use in a diversity of buildings.

3. sprayed pneumatically in place interlocks resulting in a mass which produce excellent thermal and sound properties forming a monolithic coating over the irregularities

4. virtually bonds to any common construction material such as concrete, glass, wood metal, to provide a strong, uniform, resilient, and durable texture that resist impact and abrasions without cracking or splaying

5.  The system is much faster, cleaner and easy to install,

6.  less labour intensive,

7.  most ideal and reliable for infinite variety of solutions, be it to reduce noise levels or the reverberation time

8.  good fire resistant characteristics

9.  all resulting in tremendous saving of space, time, and money.

10.available in a wide variety of standard and custom colours enabling it to be used as an attractive surface finish in both new construction and renovation projects.

11.Once applied it ensures lasting performance that people need from property

CONCLUSION

Sound quality is becoming increasingly important in today’s total acoustical experience & ICC products reduce reverberation time and noise transmission to meet clients requirement and provide high quality textured surface finishes.The seamless finish provides an ideal solution for ceilings with difficult contours such as domes or vaults. They can be applied to most surfaces including concrete, wood plaster boards, metal or glass. The product thickness is selected to achieve the required acoustical performance for each particular application.

The system contains no asbestos fiberglass or other man made fibers it is free of potential health hazard before, during or after application

So can you afford not to use it?

                                                 Nemish Sheth

                                                                                                 Asona India

After this Mr. Ajit Jhaveri, a renowned acoustical consultant, gave his presentation. Mr. Jhaveri was responsible for the acoustical design of the auditorium where this presentation was taking place.Most important, the SPRAY ON material was used in the acoustical treatment of the auditorium. The measured reverberation time of the structure was 7.35 seconds.

Mr. Jhaveri discussed in detail about his design strategy for this particular auditorium. A general purpose facility used mainly for lectures. The required reverberation time is between 0.35 to 0.65 seconds.

He said that the preliminary calculations are done at 500 Hz. Absorption coefficient of Asona is better(0.75 to 1.26) than other acoustical tiles or plaster.(0.55 to 0.65)

With a side wall treatment of 12mm thick Asona Spray On material the RT of 0.75 seconds was achieved. And with further treatment of back wall and ceiling the final RT of 0.473 seconds was achieved.

In conclusion Mr. Jhaveri noted that highly reverberant spaces can very effectively and economically treated with Asona Spray On materials

His presentation was interesting, with actual demo slides of application of K-13 spray product.

There was a lively question /answer session at the end.

Mr. Norman D’Souza of Fire n’Sound thanked everyone present.