For projects in Raipur
Auditorium acoustics and soundproofing in Raipur
A large hard volume where speech falls apart long before anyone calls the room echoey. The target is intelligibility at the back row, which is a reverberation and early reflection problem, not a loudspeaker problem. Auditoriums, banquet halls and places of worship are large hard volumes in concrete and stone where speech falls apart long before anyone calls the room echoey.
- Reverberation time
- Set against use. Speech and music want different numbers, and a dual use hall needs a decision.
- Early reflections
- Shaped surfaces that send energy to the rear seats rather than absorbing everything.
- Rear wall
- The single worst surface in most halls, and the first one to treat.
- Quote
- From a plan and a section, within 48 hours
01 / The product
What you are buying, and what it fixes in Raipur
A large hard volume where speech falls apart long before anyone calls the room echoey. The target is intelligibility at the back row, which is a reverberation and early reflection problem, not a loudspeaker problem.
Auditoriums, banquet halls and places of worship are large hard volumes in concrete and stone where speech falls apart long before anyone calls the room echoey.
Work reaching us from Raipur is mostly steel and power plant, control rooms, government and institutional buildings, colleges, hospitals, hotels.
- Heavy industry, low frequency Mills, blowers and turbines put energy into the structure. Mass, isolation and enclosure are the only things that address it.
- Control rooms run long shifts Operators listening for alarms need a low background before anything else matters.
- New institutional build Large halls and assembly rooms in concrete and tile where speech fails long before the room sounds wrong.
- Reverberation time Set against use. Speech and music want different numbers, and a dual use hall needs a decision.
Full specification
Thickness, density, NRC by frequency, fire class, standard sizes and build-up detail for auditorium acoustics are on the main product page. This page covers what that means for a project in Raipur.
02 / The build-up
The stack, in the order it is installed
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Layer 1
Wood wool acoustic panels
Wood fibre bound into a rigid board with an open texture. In Raipur, heavy industrial plant, blowers and generator sets close to occupied buildings on the same site.
With a porous backing. Board over mineral backing where the room needs more than the board alone gives.
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Layer 2
Ceiling baffles and clouds
PET felt suspended from the soffit, vertically as baffles or horizontally as clouds. In Raipur, auditoriums, banquet halls and places of worship are large hard volumes in concrete and stone where speech falls apart long before anyone calls the room echoey.
Vertical baffles. Hung on edge in rows. Both faces absorb, so coverage figures based on plan area understate them.
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Layer 3
Acoustic carpet and rugs
A tile carpet with a dense polyester face on a felt backing. In Raipur, classrooms are concrete and tile with bare walls and high ceilings, and class sizes push levels up. Corridors act as reverberation chambers that feed every room off them.
Over a resilient underlay. Where impact noise to the floor below is the actual complaint, the underlay does that work, not the carpet.
We would rather argue about the build-up at design stage than on site. See how we support architects.
03 / What drives the brief
The Raipur conditions that change the answer
- Heavy industry, low frequency
Mills, blowers and turbines put energy into the structure. Mass, isolation and enclosure are the only things that address it.
- Control rooms run long shifts
Operators listening for alarms need a low background before anything else matters.
- New institutional build
Large halls and assembly rooms in concrete and tile where speech fails long before the room sounds wrong.
- Three days by road
A dedicated truck from Palwal, confirmed before dispatch, with samples sent ahead.
- Assembly and performance rooms
Auditoriums, banquet halls and places of worship are large hard volumes in concrete and stone where speech falls apart long before anyone calls the room echoey.
- School and campus buildings
Classrooms are concrete and tile with bare walls and high ceilings, and class sizes push levels up. Corridors act as reverberation chambers that feed every room off them.
04 / Room by room
Room by room, on a typical Raipur job
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Reverberation time
Set against use. Speech and music want different numbers, and a dual use hall needs a decision. Mills, blowers and turbines put energy into the structure. Mass, isolation and enclosure are the only things that address it.
- Wood wool acoustic panels, 1200 x 600 mm
- PET felt acoustic panels, 9, 12, 18 and 24 mm standard, tolerance plus or minus 5 percent
- Ceiling baffles and clouds, Made to the drawing, standard and custom
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Early reflections
Shaped surfaces that send energy to the rear seats rather than absorbing everything. Operators listening for alarms need a low background before anything else matters.
- Wood wool acoustic panels, 20 mm
- PET felt acoustic panels, 4 to 24 mm
- Ceiling baffles and clouds, Both faces work, which is why suspended area outperforms the same area laid flat
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Rear wall
The single worst surface in most halls, and the first one to treat. Large halls and assembly rooms in concrete and tile where speech fails long before the room sounds wrong.
- Wood wool acoustic panels, 400 kg per cubic metre
- PET felt acoustic panels, 1220 x 2440 mm standard, 4 x 8 ft
- Ceiling baffles and clouds, ASTM C423
Designers get colour, pattern and CNC options with the absorption figure attached to each. See how we work with interior designers.
04 / Conditions
Durability in Raipur, before acoustics is discussed
Raipur is hot summers, mild winters and a distinct wet season, and that narrows the material list before acoustics is discussed.
PET felt handles the wet months without absorbing moisture or feeding mould. Timber and wood wool want a ventilated cavity and a stable indoor RH.
The failure we design against here is wet-season humidity behind linings.
Where a consultant is already engaged on a Raipur project, we supply to their specification and send the test reports rather than describing them. More on working with acoustic consultants.
06 / Read this first
What we watch go wrong on jobs like this
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Absorbing the whole room and losing the back rows
It sounds like a small detail until the room is finished and the complaint arrives.
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Adding speakers to fix a reverberation problem
This is the one that comes back as a second fit-out rather than a snag.
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Ignoring the rear wall because it is behind the audience
Small on the drawing, expensive on site, and almost always found after handover.
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Treating it as a generic Raipur job
Mills, blowers and turbines put energy into the structure. Mass, isolation and enclosure are the only things that address it.
05 / Getting it there
Supply into Raipur, start to site
| Made at | Our own plant, Palwal, Haryana |
|---|---|
| Reaches site in | three days |
| Dispatch | 2 to 4 working days |
| To site | three days |
| Support | Drawings, build-ups, BOQ and material that arrives complete |
Standard items dispatch in 2 to 4 working days from our plant at Palwal. Grooved panels and custom colours take longer, and we say so before you order, not after.
By road from Palwal, roughly eleven hundred kilometres, normally three days on a dedicated truck.
Questions from Raipur projects
What makes auditorium acoustics and soundproofing different in Raipur?
Auditoriums, banquet halls and places of worship are large hard volumes in concrete and stone where speech falls apart long before anyone calls the room echoey. Mills, blowers and turbines put energy into the structure. Mass, isolation and enclosure are the only things that address it.
Where should the budget go first on a Raipur project?
Reverberation time. Set against use. Speech and music want different numbers, and a dual use hall needs a decision. Early reflections. Shaped surfaces that send energy to the rear seats rather than absorbing everything.
Do you have an office or installation team in Raipur?
No. We manufacture in India and supply into Raipur. We give you drawings, build-ups, a BOQ and material that arrives complete, and we will tell you plainly when a job needs a local contractor we cannot be.
How does material get to a Raipur site?
made at: Our own plant, Palwal, Haryana, reaches site in: three days, dispatch: 2 to 4 working days. Standard items dispatch in 2 to 4 working days from our plant at Palwal. Grooved panels and custom colours take longer, and we say so before you order, not after.
What goes wrong most often on this kind of project?
Absorbing the whole room and losing the back rows. Adding speakers to fix a reverberation problem.
What do you need from us to quote?
A plan, a section through the critical partition or ceiling, and what the room is for. From that we can give a build-up and a BOQ rather than a price per square foot.
Next step
Tell us the room, we will tell you the build-up
A plan and a section is enough. We will come back with a build-up, a BOQ and a delivered date, and we will say so if what you are asking for will not work.