For projects in Diu
Auditorium acoustics and soundproofing in Diu
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 / What it is
The product, described honestly, for a Diu 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.
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 Diu is mostly hotels and guest houses, restaurants and bars, heritage properties, offices, clinics.
- Salt air is relentless PET felt does not absorb moisture, rot or corrode. On an exposed coast that is the whole material selection argument.
- Season dates are fixed Work has to finish before the season opens. Real dispatch and transit dates matter more than a marginally better price.
- Heritage stone buildings Thick masonry with hard finishes that hold sound for a long time, and a structure that usually cannot be altered.
- 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 Diu.
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 Diu, dense industrial estates with compressors, presses and generator sets close to offices, canteens and housing.
Slats on a cavity. Backing plus an air gap behind moves absorption lower, which matters in music rooms.
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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 Diu, 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.
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
Ceiling baffles and clouds
PET felt suspended from the soffit, vertically as baffles or horizontally as clouds. In Diu, 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.
Horizontal clouds. Flat rafts over the occupied zone, which also reflect early speech energy back down where it helps.
If you are specifying for a Diu project, we can give you a section, a BOQ and the honest limits of each layer. See how we support architects.
03 / Local conditions
What decides the build-up in Diu
- Salt air is relentless
PET felt does not absorb moisture, rot or corrode. On an exposed coast that is the whole material selection argument.
- Season dates are fixed
Work has to finish before the season opens. Real dispatch and transit dates matter more than a marginally better price.
- Heritage stone buildings
Thick masonry with hard finishes that hold sound for a long time, and a structure that usually cannot be altered.
- Sensible quantities
A small market does not need a full container. We would rather quote a part load that works.
- 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
Where the money goes on a Diu project
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Reverberation time
Set against use. Speech and music want different numbers, and a dual use hall needs a decision. PET felt does not absorb moisture, rot or corrode. On an exposed coast that is the whole material selection argument.
- 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
- 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. Work has to finish before the season opens. Real dispatch and transit dates matter more than a marginally better price.
- Wood wool acoustic panels, 20 mm
- 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. Thick masonry with hard finishes that hold sound for a long time, and a structure that usually cannot be altered.
- Wood wool acoustic panels, 400 kg per cubic metre
- PET felt acoustic panels, 1220 x 2440 mm standard, 4 x 8 ft
- Acoustic carpet and rugs, 64 sq ft per pack
Interior designers tend to arrive with the look already decided. We will tell you which finish gets there without losing the acoustics. See how we work with interior designers.
04 / Conditions
Why the climate in Diu changes the material, not the target
Diu 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.
On a Diu job with a consultant involved, our part is material that matches the submitted data. See working with acoustic consultants.
06 / Worth knowing
Where this kind of project usually fails
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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 Diu job
PET felt does not absorb moisture, rot or corrode. On an exposed coast that is the whole material selection argument.
05 / Logistics
Getting it to Diu, with real dates
| 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 twelve hundred and fifty kilometres, normally three days on a dedicated truck.
Questions from Diu projects
What makes auditorium acoustics and soundproofing different in Diu?
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. PET felt does not absorb moisture, rot or corrode. On an exposed coast that is the whole material selection argument.
Where should the budget go first on a Diu 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 Diu?
No. We manufacture in India and supply into Diu. 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 Diu 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
Send the drawings, get a straight answer
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.