Technical Column
Why Measurement Rooms and Measurement Instruments Must Be Designed Together — Managing Environmental Noise and Instrument Precision as a Unified System —
2025年8月26日
- HBK × SONORA Acoustic Measurement Solution Official Website
- Technical Column
- Why Measurement Rooms and Measurement Instruments Must Be Designed Together — Managing Environmental Noise and Instrument Precision as a Unified System —
Acoustic Power Measurement
Introduction: Hidden Factors That Distort Precision Measurements
In acoustic, vibration, and NVH testing, high-end instruments alone cannot guarantee accurate results.
Surprisingly, many measurement errors originate not from devices themselves, but from the measurement environment—the room.
At Moritani, we help clients resolve these challenges by combining the sensing expertise of HBK (Hottinger Brüel & Kjær) with the acoustic facility design of Sonora Technology, forming a complete solution that maximizes performance.
Where Do Measurement Errors Really Come From?
Even with precision instruments, poor room conditions can introduce serious issues such as:
- ±3 dB fluctuations in sound pressure depending on microphone position
- Intrusive ambient noise contaminating test data
- Vibrations from the floor interfering with accelerometers
- Structure-borne noise causing false positives or waveform distortions
These problems are not device-related—they are space-related.
Moritani’s Total Solution: HBK × Sonora
We offer integrated solutions combining measurement instruments and tailored acoustic environments:
ISO-Compliant Sound Power Testing
SPAC (Sound Power Anechoic Chamber) × HBK microphones & FFT analyzers
→ Achieves true inverse-square law behavior and 1/3-octave band accuracy.
NVH Evaluation with VSAC
VSAC × torque sensors × accelerometers
→ Simultaneous analysis of drive unit torque fluctuation and noise behavior.
Acoustic End-of-Line Testing with AEB
AEB × PULSE analyzer
→ Suitable for high-volume testing of smart speakers, MEMS microphones, communication modules, etc.
Each space is specifically designed to support and extend the precision of HBK instruments.
From Instruments to Systems
精What matters in precision acoustics isn’t just the quality of the sensors—it’s how they’re used in the right space.
- Reduce measurement error through room design
- Ensure reproducibility by controlling the test environment
- Precision begins with silence
At Moritani, we deliver not just products, but fully integrated measurement systems.
Contact Us
If your team is facing any of the following challenges, we invite you to consult with Moritani:
- Need to improve measurement accuracy
- Want to optimize HBK devices in real-world environments
- Planning to build or retrofit an acoustic test room
- Preparing for ISO-compliant measurement certification
▶ [Contact Us Here]
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How Quiet Is the Inside of an Anechoic Box?
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
Contact / Request Brochure
For inquiries or consultations regarding the total solutions provided by HBK × Sonora, please feel free to contact us using the Contact button.
If you would like a brochure sent by mail, please use the Request Brochure button.