For projects in Indonesia
Auditorium acoustics and soundproofing in Indonesia
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. Places of worship, function halls and community buildings are large hard rooms carrying amplified speech and music.
- 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 Indonesia 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.
Places of worship, function halls and community buildings are large hard rooms carrying amplified speech and music.
Work reaching us from Indonesia is mostly offices and towers, hotels and resorts, manufacturing plants, hospitals, schools, studios.
- An onward leg is normal Material often continues by road or inter-island ferry after the port. Tell us and we brace and wrap for the second journey.
- Tropical humidity all year PET felt does not absorb moisture, shed fibre or feed mould, which matters where mineral products sag within a couple of seasons.
- Dense cities, constant traffic Street noise reaches rooms through openings and glazing long before it comes through the wall. Fix the weakest path first.
- 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 Indonesia.
02 / The build-up
The build-up, layer by layer
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Layer 1
Wood wool acoustic panels
Wood fibre bound into a rigid board with an open texture. In Indonesia, split units everywhere, with condensers on balconies and light wells that channel noise straight back into bedrooms.
On a cavity. Mounted on battens with an air gap, which is where the low mid performance comes from.
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Layer 2
Wooden slat acoustic panels
Timber slats on an acoustic backing. In Indonesia, places of worship, function halls and community buildings are large hard rooms carrying amplified speech and music.
Slats on a cavity. Backing plus an air gap behind moves absorption lower, which matters in music rooms.
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Layer 3
Acoustic carpet and rugs
A tile carpet with a dense polyester face on a felt backing. In Indonesia, classrooms are hard, naturally ventilated and open to corridor and street noise, so absorption alone will not fix intelligibility.
Loose lay on tackifier. Tiles lifted individually for access under a raised floor, which is why tile beats broadloom in an office.
We would rather argue about the build-up at design stage than on site. See how we support architects.
03 / In this market
What the buildings in Indonesia do to the specification
- An onward leg is normal
Material often continues by road or inter-island ferry after the port. Tell us and we brace and wrap for the second journey.
- Tropical humidity all year
PET felt does not absorb moisture, shed fibre or feed mould, which matters where mineral products sag within a couple of seasons.
- Dense cities, constant traffic
Street noise reaches rooms through openings and glazing long before it comes through the wall. Fix the weakest path first.
- Manufacturing at scale
Plant noise where enclosure and mass do the work, and measurement rooms that need a genuinely low background.
- Assembly and performance rooms
Places of worship, function halls and community buildings are large hard rooms carrying amplified speech and music.
- School and campus buildings
Classrooms are hard, naturally ventilated and open to corridor and street noise, so absorption alone will not fix intelligibility.
04 / Room by room
Room by room, on a typical Indonesia job
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Reverberation time
Set against use. Speech and music want different numbers, and a dual use hall needs a decision. Material often continues by road or inter-island ferry after the port. Tell us and we brace and wrap for the second journey.
- Wood wool acoustic panels, 1200 x 600 mm
- Wooden slat acoustic panels, 13-3, 14-2, 28-4 and 59-5
- 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. PET felt does not absorb moisture, shed fibre or feed mould, which matters where mineral products sag within a couple of seasons.
- Wood wool acoustic panels, 20 mm
- Wooden slat acoustic panels, 2440 x 192 mm and 2440 x 128 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. Street noise reaches rooms through openings and glazing long before it comes through the wall. Fix the weakest path first.
- Wood wool acoustic panels, 400 kg per cubic metre
- Wooden slat acoustic panels, 14, 16 and 18 mm
- Ceiling baffles and clouds, ASTM C423
If the visual is fixed and the room still has to perform, that is a solvable problem and a conversation worth having early. See how we work with interior designers.
04 / Durability
What the Indonesia climate rules in and rules out
Indonesia 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 Indonesia job with a consultant involved, our part is material that matches the submitted data. See working with acoustic consultants.
06 / Before you buy
Six mistakes that turn into a second fit-out
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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
It sounds like a small detail until the room is finished and the complaint arrives.
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Ignoring the rear wall because it is behind the audience
This is the one that comes back as a second fit-out rather than a snag.
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Treating it as a generic Indonesia job
Material often continues by road or inter-island ferry after the port. Tell us and we brace and wrap for the second journey.
05 / Getting it there
Supply into Indonesia, start to site
| Ships from | Palwal, Haryana, India |
|---|---|
| Arrives at | Tanjung Priok, then road or onward by sea |
| Dispatch | 4 to 7 working days |
| Freight | Sea via Tanjung Priok |
| 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 Tanjung Priok, then road or inter-island onward. Air freight for samples and urgent quantities.
Questions from Indonesia projects
What makes auditorium acoustics and soundproofing different in Indonesia?
Places of worship, function halls and community buildings are large hard rooms carrying amplified speech and music. Material often continues by road or inter-island ferry after the port. Tell us and we brace and wrap for the second journey.
Where should the budget go first on a Indonesia 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 Indonesia?
No. We manufacture in India and supply into Indonesia. 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 Indonesia site?
ships from: Palwal, Haryana, India, arrives at: Tanjung Priok, then road or onward by sea, 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
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.