For projects in Jakarta
Auditorium acoustics and soundproofing in Jakarta
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 / Start here
The product, described honestly, for a Jakarta brief
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 Jakarta is mostly towers and offices, apartments, hotels, hospitals, schools, studios.
- Noise arrives from outside Traffic and construction reach rooms through glazing and openings long before they come through a wall. Fix the weakest path first.
- Concrete towers, live interiors The structure blocks well. The problem is tile, glass and stone inside making the room ring.
- Standby generation Power backup sits close to occupied space in most commercial buildings and runs often enough to matter.
- 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 Jakarta.
02 / The build-up
The stack, in the order it is installed
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Layer 1
Wooden slat acoustic panels
Timber slats on an acoustic backing. In Jakarta, split units everywhere, with condensers on balconies and light wells that channel noise straight back into bedrooms.
Slats on felt backing. The standard. Absorption comes from the backing behind the gaps, so the slat gap ratio is an acoustic decision, not only a visual one.
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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 Jakarta, places of worship, function halls and community buildings are large hard rooms carrying amplified speech and music.
Direct to wall. Panel bonded or mechanically fixed flat to the substrate. Simplest, and the weakest at low frequency.
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Layer 3
Acoustic carpet and rugs
A tile carpet with a dense polyester face on a felt backing. In Jakarta, classrooms are hard, naturally ventilated and open to corridor and street noise, so absorption alone will not fix intelligibility.
Zoned. Carpet in the circulation and meeting zones, hard floor elsewhere, so the treatment sits where the noise is made.
If you are specifying for a Jakarta project, we can give you a section, a BOQ and the honest limits of each layer. See how we support architects.
03 / What drives the brief
The Jakarta conditions that change the answer
- Noise arrives from outside
Traffic and construction reach rooms through glazing and openings long before they come through a wall. Fix the weakest path first.
- Concrete towers, live interiors
The structure blocks well. The problem is tile, glass and stone inside making the room ring.
- Standby generation
Power backup sits close to occupied space in most commercial buildings and runs often enough to matter.
- The port is in the city
Tanjung Priok is close, which keeps the road leg short and the landed cost predictable.
- 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 Jakarta job
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Reverberation time
Set against use. Speech and music want different numbers, and a dual use hall needs a decision. Traffic and construction reach rooms through glazing and openings long before they come through a wall. Fix the weakest path first.
- Wood wool acoustic panels, 1200 x 600 mm
- Wooden slat acoustic panels, 13-3, 14-2, 28-4 and 59-5
- PET felt acoustic panels, 4 to 24 mm
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Early reflections
Shaped surfaces that send energy to the rear seats rather than absorbing everything. The structure blocks well. The problem is tile, glass and stone inside making the room ring.
- Wood wool acoustic panels, 20 mm
- 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
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Rear wall
The single worst surface in most halls, and the first one to treat. Power backup sits close to occupied space in most commercial buildings and runs often enough to matter.
- Wood wool acoustic panels, 400 kg per cubic metre
- Wooden slat acoustic panels, 14, 16 and 18 mm
- PET felt acoustic panels, 2440 x 4270 mm, 2.44 x 4.27 m, 8 x 14 ft
For a Jakarta interior where the finish leads, we will say plainly what each option costs you acoustically. See how we work with interior designers.
04 / Climate and durability
Why the climate in Jakarta changes the material, not the target
Jakarta 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.
Consultants get the raw data, not a sales sheet. That is the whole of our side of the job, and it is set out under working with acoustic consultants.
06 / Worth knowing
The six errors that cost the most
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Absorbing the whole room and losing the back rows
This is the one that comes back as a second fit-out rather than a snag.
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Adding speakers to fix a reverberation problem
Small on the drawing, expensive on site, and almost always found after handover.
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Ignoring the rear wall because it is behind the audience
It sounds like a small detail until the room is finished and the complaint arrives.
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Treating it as a generic Jakarta job
Traffic and construction reach rooms through glazing and openings long before they come through a wall. Fix the weakest path first.
05 / Getting it there
How material reaches a Jakarta site
| Ships from | Palwal, Haryana, India |
|---|---|
| Arrives at | Tanjung Priok, then a short road run into the city |
| 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 a short road run into the city. Air freight for samples and urgent quantities.
Questions from Jakarta projects
What makes auditorium acoustics and soundproofing different in Jakarta?
Places of worship, function halls and community buildings are large hard rooms carrying amplified speech and music. Traffic and construction reach rooms through glazing and openings long before they come through a wall. Fix the weakest path first.
Where should the budget go first on a Jakarta 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 Jakarta?
No. We manufacture in India and supply into Jakarta. 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 Jakarta site?
ships from: Palwal, Haryana, India, arrives at: Tanjung Priok, then a short road run into the city, 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
Send what you have. We will give you a layer by layer build-up, a bill of quantities and a date material lands, and we will flag anything in the brief that will not achieve what you want.