Technical Column
Modular Semi-Anechoic Chambers — A Flexible Solution for Deployable Acoustic Testing —
Nov 30, 2025
- HBK × SONORA Acoustic Measurement Solution Official Website
- Technical Column
- Modular Semi-Anechoic Chambers — A Flexible Solution for Deployable Acoustic Testing —
Acoustic Power Measurement
Introduction
Traditional anechoic chambers were fixed installations—once built, they could not be moved or reconfigured.
Today, as testing sites become more distributed and product cycles shorter, the need for modular, reconfigurable acoustic environments has grown.
This article introduces the design concept and operational advantages of Modular Semi-Anechoic Chambers (MSAC).
What Is a Modular Structure?
A modular chamber is built from prefabricated units:
acoustic wall modules, sound insulation panels, and vibration-isolated frames.
| Component | Description |
|---|---|
| Acoustic modules | Pre-tuned broadband absorbers for walls and ceilings |
| Sound insulation panels | Steel or composite sandwich walls |
| Vibration isolation base | Floating frame for mechanical decoupling |
| Frame joints | Bolt-connected, reusable, and relocatable |
These pre-engineered units allow rapid installation and consistent performance across sites.
Installation Flexibility and Reconfigurability
Modular systems provide exceptional adaptability:
- Easy installation in existing buildings
- Reconfiguration or relocation without loss of performance
- Scalable structure for expansion or downsizing
- Partial operation possible during installation
The result is a chamber that can be assembled, operated, and evolved simultaneously.
Acoustic Performance and Stability
Despite its modularity, performance equals that of fixed chambers.
Each module’s absorption and insulation characteristics are factory-verified, ensuring predictable in-situ performance.
Key acoustic requirements include:
- Stable absorption across 125 Hz–8 kHz
- Non-fibrous, dust-free materials
- Surfaces designed for easy cleaning and inspection
These attributes ensure measurement repeatability across installations.
Maintenance and Lifecycle Management
Modular structures simplify maintenance:
- Replace or inspect individual modules without downtime
- Repair localized damage without full reconstruction
- Maintain testing schedules even during upgrades
This minimizes operational interruptions—essential for R&D and production testing.
Cost Efficiency and Lifecycle Value
Modularity transforms the economic model of test facilities:
- Reduced installation time and downtime
- Reusable assets across multiple projects
- Predictable maintenance costs
The result is a sustainable, lifecycle-oriented test environment that evolves with development needs.
Conclusion: Flexibility as a Test Parameter
Accuracy is vital—but so is adaptability.
Modular semi-anechoic chambers redefine what “acoustic performance” means, by combining precision with mobility.
They represent a shift from static test rooms to dynamic acoustic platforms, built to move, evolve, and remain precise—even as testing demands change.
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Contact Us
- Contact us by email
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- Contact us by phone
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Moritani Shokai
(Machinery Department No. 2, Tokyo Head Office)
Introduction of the Manufacturer
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Hottinger Bruel & Kjaer
HHBK is a merger of two companies: Brüel & Kjær of Denmark and HBM of Germany.
Brüel & Kjær is one of the world’s leading manufacturers of acoustic and vibration measurement instruments, known as a total measurement chain supplier.Learn more about HBK
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Sonora Technology Co., Ltd.
Sonora Technology is a leading Japanese manufacturer of industrial anechoic chambers and anechoic boxes.
From design and manufacturing to installation and acoustic performance assurance, Sonora provides fully integrated solutions to build complete acoustic measurement environments from the ground up.Learn more about Sonora
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