Technical Column
Local Exhaust System for Semi-Anechoic Chambers
May 26, 2025
- HBK × SONORA Acoustic Measurement Solution Official Website
- Technical Column
- Local Exhaust System for Semi-Anechoic Chambers
Acoustic Power Measurement
In a VSAC (Vehicle Semi-Anechoic Chamber), vehicles are operated inside the semi-anechoic chamber for acoustic measurements.
Since the semi-anechoic chamber is an enclosed space, exhaust gases from the vehicle’s muffler must be discharged to the outside.
The photo shows the local exhaust system.
The exhaust outlet can be flexibly adjusted to match the position and height of the vehicle’s muffler.
This system is equipped with a dynamic exhaust fan connected to an externally installed silencer, allowing for high airflow while ensuring that fan noise does not affect the chamber’s low background noise environment.
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Contact Us
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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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