Technical Column
Cable Noise During Acoustic Measurements
May 26, 2025
- HBK × SONORA Acoustic Measurement Solution Official Website
- Technical Column
- Cable Noise During Acoustic Measurements
Simplified Performance Testing Using Anechoic Box + Sound Level Meter
The diagram above illustrates the configuration of a sound level meter, extension cable, and microphone.
By passing the cable through the cable port (penetration hole) of the anechoic box and sealing it with a sound-insulating cover, external noise intrusion through the penetration can be prevented. This also allows the sound level meter to be operated from outside the box.
However, if multiple cables are passed through a single cable port simultaneously, cable-induced noise may occur and affect measurement accuracy.
For this reason, we recommend equipping multiple cable ports in anechoic boxes or anechoic chambers, with one cable per port, depending on the specific purpose or signal type.
Cable ports can also be customized in terms of shape, size, and sealing method.
When passing thick or bulky cables, a standard cover may not provide adequate sealing, and alternative soundproofing treatments should be applied.
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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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