Acoustic Materials, SMAs

I- TYPES OF ACOUSTIC MATERIALS II- SOUND LEVEL METER (Sound measuring apparatus) BUILDING SERVICES III (ARC323)

Hima Karthik. S 1190100870 B.Arch. III Year VI SEM SPA Vijayawada

1. BASOTECT Basotect is a light weight open cell foam, which is made from melamine resin. It is flexible, easy to handle. It is easy to cut and install. It is available in sheet form and also available in pre-cut or profiled to size and shape. The natural colour of the foam is light grey, although it is also available in a range of functional or decorative facings and fabrics that can he sprayed with flexible PVC coating. It is designed for use in thermal and acoustic insulation applications.

Properties of Basotect: • It is flame resistant.

• It has high sound absorption.

• It is heat resistant.

• It has light weight.

• It has good thermal insulation.

Applications of Basotect: • It is used in building services like arid ceiling panels for office, conference suit etc.

• It is extensively used in recording studios for the work of wall panels, ceiling tiles and anechoic wedges.

• It is used in engine room and accommodation areas of marine ship.

• It is used in automotive for car trim engine and under bonnet panels.

• It has industrial applications and used as enclosure linings & suspended absorbers.

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2. SOUND FIBRE-ROCK Sound fibre rock is made from non-combustible rock fibre. It is available in four different thickness. It is supplied in slabs of size 1000 x 600 mm. The slabs can also be supplied as part of an acoustic composite product with lead or polymeric barriers.

Properties of sound fibre-rock: • It is resistance to high temperature.

• It has excellent sound and thermal qualities.

• It is simple to cut and install.

Applications of sound fibre- rock: • Since it has excellent sound and thermal qualities, making it an ideal choice for cavity wall, floor and ceiling insulation.

• Sound fibre rock slabs are particularly suitable for acoustic infill in partitions and ceilings, provided a high level of control of both airborne and structure born sound.

• It is also suitable for acoustic absorption in the linings of buildings, with the 600 N /m³ slabs being particularly good in sound studios.

• The 450 N/m³ slabs can also be used to firestop small voids, in particular the gap under pitched roof in dwellings.

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3. SOUND FIBRE-POLY It is manufactured from non-irritating water repellent polyester fibres. It is designed for use in acoustic and thermal insulation applications. It can be supplied in sheet form in packs 10 or cut to a specific size and shape. It can also be supplied in fabric wrapped form for architectural applications or with other performances enchanting facings.

Properties of Sound fibre-poly: • It is rot proof, odorless, non-hygroscopic , will not sustain vermin.

• It will not encourage the growth of fungi or bacteria.

• It is dimensionally stable under varying conditions of temperature and humidity.

•Applications For long termof protection, it should be stored in a dry well sound fibre-poly: • Sound fibre-poly ventilated area. sheets are particularly suitable for architectural building applications such as wall or ceiling panels.

• It is also used in low temperature heating and ventilation equipment.

45mm polyester fibre Acoustic panel ceiling board

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4. BARRIER MATS It consist of thermoplastic polymer with phthalate esters and mineral fillers, making it an extremely durable and flexible product. It is available plain, self-adhesive backed or with a reinforced class ‘0’ foil facing. It is available in thickness of 2.5 mm and 4.5 mm.

Properties of Barrier mats: • It is black in colour.

• Its density varies from 50 N/m² to 100 N/m².

• Its hardness is 90°.

• It is resistant to fire.

• Its operating temperature is 90°C for extended period and 120°C for short period.

Application of Barrier mats: Barrier mats are designed to add mass and reduce noise transmission on various products, including mechanical and electrical equipment, automotive components and extensively within the building industry on walls, floors and ceilings etc.

5. ACOUSTIC PLASTER

Like acoustic plasterboard, acoustic plaster finishes have been around for years. Varying ingredients, compounds and systems can increase or decrease weight and flexibility to further reduce surface reflections and in doing so help with equalization of the internal acoustics.

Uses: shopping centers and theatres, universities, restaurants, office spaces, entrance halls, museums, libraries, dining areas as well as some very exclusive private residences.

Pros: can further help to reduce surface reflection and resonance.

Cons: although increased depth and weight can add to deflection of sound waves, these are invariably used for increased acoustic calibration.

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6. ACOUSTIC CAULK A complementary soundproofing solution which is intended to seal overlaps of materials, fill small gaps, cracks, or spaces in a room. Sound can travel through even the smallest areas, and so it is important to seal off a room completely for the best possible results.

Acoustic caulk is a must where plasterboard or drywall is installed to reduce possible weakness but should not be relied upon to achieve acoustic levels by themselves. Areas like corners between walls, lines where walls and ceilings meet, and doors and windows must be completely sealed.

While this product is not STC or NRC rated, it is the next logical step after insulation, underlayment, and other, bigger soundproofing projects.

Uses: to fill any gaps easily to ensure best soundproofing results Pros: inexpensive, easy to apply, comes out white and paintable Cons: a complementary soundproofing option and will not soundproof a room in isolation, requires a caulking gun

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7. UNDERLAYMENT FOR FLOORS Anyone who would also like to benefit from some noise reduction can consider Underlayment. If the user plans correctly, the layer can be installed under laminate, engineered, or solid hardwood floors to make a real difference in the amount of sound that travels through the floor.

This product installs easily underneath the flooring material of choice.

It has adhesive strips along its length to seal the rows together as well. This creates an effective noise barrier and serves as the moisture barrier almost all flooring materials require. Plus, it installs underneath the floor, keeping it out of sight.

The only downside to this product is the user has to be willing to install a new floor over it, meaning it requires more planning and a larger budget than Product Specs other soundproofing options.

Type: Underlayment Rating: 73 STC Extra features: Moisture barrier Pros: • Very effective noise reduction • Simple installation process • Hides out of sight Cons: • Requires a new floor

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8. BLACKOUT CURTAINS The soundproof and blackout curtains feature two layers of thick, triple-weave polyester fabric. This design allows them to absorb sounds up to two times more than traditional curtains, keeping the room quiet and peaceful. The twolayer design also adds a barrier of insulation to prevent warm and cold air from escaping or seeping in from outside.

However, there isn’t an NRC or STC rating available.

The curtains block 100 percent of sunlight and UV rays from entering a room. These acoustic drapes are available in multiple sizes and 16 color options to match different room decors and personal preferences. When needed, safely machine-wash these curtains in warm water with a mild detergent and iron them on low heat.

Product Specs Type: Curtain Rating: Not available Extra features: Light control, style Pros • Two times more effective than traditional curtains • Blocks sunlight and UV rays • Available in several colors and sizes Cons • No NRC or STC rating available

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9. ART ACOUSTIC PANELS For those whose home office or studio calls for something a bit classier than the eggcrate look or a network of ridges, soundproof in style with art acoustic panels. The panels come in various solid colors as well as a variety of interesting patterns. Choose a simple, client-friendly design or go full-traveler mode with a world map background.

These acoustic panels are made from 100 percent polyester, so they’re safe for families and pets, with no offgassing, dust, or other possible harmful materials. They’re also flame retardant.

Outfitting an entire room with these stylish squares could get expensive, since each package only covers 6 square feet. However, they’d make an attractive addition as an inset design surrounded by ridged acoustic panels.

Product Specs •Type: Panel •Rating: NRC .9 •Extra features: Style, flame retardant Pros •Available in several colors and styles •Excellent NRC rating •Installs with double-sided foam tape Cons •Outfitting an entire room can get expensive

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10. ATS ACOUSTIC PANEL For those who don’t find foam panels or rubber sheets especially attractive, these jute-covered acoustic panels are bound to please. The panels are 2 inches thick and have solid wood frames that make them a snap to hang or attach to a wall. Though available in a few different colors, neutral options like ivory and natural tend to suit homes and offices best.

The ATS Acoustic Panel offers an NRC rating of 1.0, making it extremely effective at reducing noise. The jute fabric will also do its part to minimize light reflection—especially helpful for folks who need to sleep in after the sun rises. However, if all that’s required is echo control, there are less expensive options that will do the trick.

Product Specs Type: Panel Rating: NRC 1.0 Extra features: Light control, styling Pros • Excellent noise absorption • Comes in several colors • Easy to install Cons • One of the more expensive panel options

ATS Acoustic Art panels

SOUND LEVEL METER A sound level meter is a measuring instrument, designed to measure sound levels in a standardized way. Commonly referred to as a sound meter, noise meter, decibel meter, or sound pressure level (SPL) meter, a sound level meter is designed to respond to sound in approximately the same way as the human ear.

The purpose of a sound level meter is to give objective reproducible measurements of sound pressure levels (SPL).

II APPLICATIONS Sound level meters and analyzers are used to measure and manage noise from a variety of sources.

• Environmental noise • • • • •

WORKING A sound level meter basically consists of a microphone, a preamplifier, a signal processing unit, and a display.

The most suitable type of microphone for a sound level meter is a condenser microphone, which combines precision with measurement reliability. The microphone converts the sound signal to an equivalent electrical signal. The electrical signal produced by the microphone is at a very low level and must be enhanced by a preamplifier, before reaching the main processor.

Occupational noise Construction noise • Rail noise Airport noise • Community noise Mining noise • Wind farm noise • Industrial noise Traffic noise • Motorsport noise

SOURCES • • • • •

https://www.acoustiblok.co.uk/soundproofing-materials/ https://www.bobvila.com/articles/best-soundproofing-material/ https://www.sciencedirect.com/topics/engineering/sound-level-meter https://www.bksv.com/en/instruments/handheld/sound-level-meters https://www.archiproducts.com/en/products/rockwool-italia/rock-wool-thermal-insulation-panel-sound-insula tion-and-sound-absorbing-panel-in-mineral-fibre-rockacier-c-soudable_157071

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