Technical Column
Measured Sound Insulation Performance of Anechoic Enclosures in the High-Frequency Range
May 27, 2025
- HBK × SONORA Acoustic Measurement Solution Official Website
- Technical Column
- Measured Sound Insulation Performance of Anechoic Enclosures in the High-Frequency Range
Simplified Performance Testing Using Anechoic Box + Sound Level Meter
Sound Insulation Performance of Anechoic Enclosures (Measured and Guaranteed Values)
Our anechoic enclosures provide both guaranteed and measured sound insulation values across a frequency range of 31.5 Hz to 8 kHz.
- Guaranteed Values: Manufacturer-guaranteed performance
- Measured Values: Actual results obtained from past measurements
In recent years, demand has increased for performance evaluation in higher frequency ranges beyond 8 kHz.
We have measured the sound insulation levels at 10 kHz, 12.5 kHz, 16 kHz, and 20 kHz, as shown below:
| Frequency (Hz) | 10KHz | 12.5KHz | 16KHz | 20KHz |
|---|---|---|---|---|
| Measured Sound Insulation (dB) | 70.2 | 70.5 | 68.8 | 65.6 |
Although sound insulation values above 10 kHz are not covered under the manufacturer’s warranty, the enclosure demonstrates excellent high-frequency sound insulation performance.
If you are considering an anechoic enclosure combined with a sound level meter, we hope this data serves as a helpful reference.
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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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