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For projects in Bangladesh
Auditorium acoustics and soundproofing in Bangladesh
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. Community halls, places of worship and conference rooms are hard volumes carrying amplified speech.
- 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 / What it is
The material, and what it actually does on a Bangladesh job
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.
Community halls, places of worship and conference rooms are hard volumes carrying amplified speech.
Work reaching us from Bangladesh is mostly garment and manufacturing units, generator and plant rooms, offices, hospitals, schools, hotels.
- Reachable by road The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
- Garment units at scale Large production floors with continuous machine noise and rooms where instructions and alarms have to be understood. Enclosure first, absorption second.
- Generators run constantly Standby and continuous generation sits close to occupied space almost everywhere. That is mass and enclosure work, not panels.
- 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 Bangladesh.
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 Bangladesh, split units and diesel generator sets, with generators close to occupied rooms and running often.
Direct fix. Mechanically fixed to the soffit or wall. Durable and simple.
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Layer 2
PET felt acoustic panels
A rigid non-woven panel pressed from 100% polyester fibre, a large part of it recycled. In Bangladesh, community halls, places of worship and conference rooms are hard volumes carrying amplified speech.
On a 25 to 50 mm air gap. The same panel on battens. The air gap moves absorption down in frequency at no extra material cost, and is the cheapest improvement available.
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Layer 3
Acoustic carpet and rugs
A tile carpet with a dense polyester face on a felt backing. In Bangladesh, classrooms are concrete and tile with very large class sizes, and street noise enters through open windows all day.
Loose lay on tackifier. Tiles lifted individually for access under a raised floor, which is why tile beats broadloom in an office.
If you are specifying for a Bangladesh project, we can give you a section, a BOQ and the honest limits of each layer. See how we support architects.
03 / In this market
What the buildings in Bangladesh do to the specification
- Reachable by road
The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
- Garment units at scale
Large production floors with continuous machine noise and rooms where instructions and alarms have to be understood. Enclosure first, absorption second.
- Generators run constantly
Standby and continuous generation sits close to occupied space almost everywhere. That is mass and enclosure work, not panels.
- Dense, humid, monsoon climate
PET felt does not hold moisture or feed mould, which decides whether a ceiling survives more than a couple of seasons.
- Assembly and performance rooms
Community halls, places of worship and conference rooms are hard volumes carrying amplified speech.
- School and campus buildings
Classrooms are concrete and tile with very large class sizes, and street noise enters through open windows all day.
04 / Room by room
What each space in a Bangladesh project needs
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Reverberation time
Set against use. Speech and music want different numbers, and a dual use hall needs a decision. The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
- Wooden slat acoustic panels, MDF, FR MDF, HDF or HDHMR
- PET felt acoustic panels, 9, 12, 18 and 24 mm standard, tolerance plus or minus 5 percent
- Acoustic carpet and rugs, High density polyester
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Early reflections
Shaped surfaces that send energy to the rear seats rather than absorbing everything. Large production floors with continuous machine noise and rooms where instructions and alarms have to be understood. Enclosure first, absorption second.
- Wooden slat acoustic panels, 13-3, 14-2, 28-4 and 59-5
- PET felt acoustic panels, 4 to 24 mm
- Acoustic carpet and rugs, Felt
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Rear wall
The single worst surface in most halls, and the first one to treat. Standby and continuous generation sits close to occupied space almost everywhere. That is mass and enclosure work, not panels.
- Wooden slat acoustic panels, 2440 x 192 mm and 2440 x 128 mm
- PET felt acoustic panels, 1220 x 2440 mm standard, 4 x 8 ft
- Acoustic carpet and rugs, 64 sq ft per pack
Designers get colour, pattern and CNC options with the absorption figure attached to each. See how we work with interior designers.
04 / Climate and durability
What the Bangladesh climate rules in and rules out
Bangladesh is warm and humid through most of the year, with a long wet season, and that narrows the material list before acoustics is discussed.
Humidity is the deciding factor. PET felt does not absorb moisture, shed fibre or feed mould, which is why it outlasts fabric-wrapped mineral wool in this climate. Wood wool and timber need a ventilated cavity behind them.
The failure we design against here is mould, sagging fabric finishes and swelling in timber.
On a Bangladesh job with a consultant involved, our part is material that matches the submitted data. See working with acoustic consultants.
06 / Before you buy
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 Bangladesh job
The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
05 / Logistics
How material reaches a Bangladesh site
| Ships from | Palwal, Haryana, India |
|---|---|
| Arrives at | Chattogram by sea, or overland through the land border |
| Dispatch | 4 to 7 working days |
| Freight | Sea or land border |
| Support | Drawings, build-ups, BOQ and material that arrives complete |
Standard items dispatch in 4 to 7 working days. Grooved panels and custom colours take longer, and we say so before you order, not after.
Sea freight into Chattogram, or overland through the land border where that suits the programme better. Air freight for samples and urgent quantities.
Questions from Bangladesh projects
What makes auditorium acoustics and soundproofing different in Bangladesh?
Community halls, places of worship and conference rooms are hard volumes carrying amplified speech. The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
Where should the budget go first on a Bangladesh 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 Bangladesh?
No. We manufacture in India and supply into Bangladesh. 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 Bangladesh site?
ships from: Palwal, Haryana, India, arrives at: Chattogram by sea, or overland through the land border, dispatch: 4 to 7 working days. Standard items dispatch in 4 to 7 working days. 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
Send the drawings, get a straight answer
We quote from drawings, not from a square foot rate. Send a plan and the section through the critical wall or ceiling and you will get something you can actually build from.