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This section provides an overview for acoustic anechoic boxes as well as their applications and principles. Also, please take a look at the list of 6 acoustic anechoic box manufacturers and their company rankings. Here are the top-ranked acoustic anechoic box companies as of April, 2025: 1.Sonora Technology Co., Ltd., 2.GRAS Sound & Vibration, 3.FAIST ANLAGENBAU GMBH..
Table of Contents
An anechoic box has two properties: sound insulation and sound absorption.
It blocks sound waves coming from outside the box, while it does not reverberate sound inside the box. It is used to measure sound waves generated by compact driving components such as motors and fans, and electrical equipment using a sound level meter or analyzer.
The acoustic anechoic box is used in combination with a sound level meter and analyzer. A microphone cable is connected to a measuring instrument installed outside the box and a microphone is set inside the box via a cable port in the anechoic box. The generated sound of a DUT (device under test) is measured by operating the measuring instrument outside the box.
Unlike an anechoic chamber, there are no requirements by ISO standards on its design and measurement, but it is used for the purpose of a simplified measurement. However, correlative and comparative measurements are feasible by making corrections based on the master data acquired in an anechoic chamber.
The background noise inside an anechoic box should be a very quiet environment. It may be preferable for the background noise to be at least 10 dB lower than the measurement sound of DUT. In other words, when the measurement sound is 30 dB, the environment inside the anechoic box should be quieter than 20 dB. Therefore, the anechoic box is required to have high sound insulation value.
The measuring equipment used in combination with the anechoic box should be selected according to the sound generated by DUT, and relatively high-performance microphone and analyzer are required as well.
Reliable measuring instrument manufacturers: Hottinger Brüel & Kjær, GRAS, Siemens, Onosokki, Rion…etc.
*Including some distributors, etc.
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IAC Acoustics, established in 1949 and headquartered in Illinois, United States, is a manufacturer and supplier specializing in metal noise control solutions. The company’s portfolio caters to industrial, architectural, and medical applications. Their industrial solutions include in-plant and outdoor enclosures, noise barriers, and anechoic chambers. Architectural solutions include secure facilities, acoustical doors, windows, and music practice rooms. Their medical solutions include audiology booths and test chambers. IAC Acoustics provides noise control products and acoustic systems locally and internationally to clients across various industries.
Brüel & Kjr, originally founded in 1942 with headquarters in Denmark, is a manufacturer of precision measuring technologies and measuring equipment. The company merged with Hottinger in 2019, a manufacturer of combustion engines and turbo chargers, and shared expertise in precision-accurate technologies, and Hottinger Brüel & Kjr, HBK, was born. HBK's new company's products include high-calibration systems, industrial electronics, vibration testing equipment, combustion engines, and acoustic end-of-line test systems for OEMs. HBK's services include custom solutions such as acoustic-tuned turbine engines used in wind-power infrastructure projects, among many others.
GRAS Sound and Vibration, established in 1994 and based in Denmark, is a manufacturer of measurement microphones and acoustic equipment. The company is a part of the sound and vibration industry and they provide measurement applications and solutions for customers in the fiels of aerospace, automotive, audiology, and consumer electronics. GRAS does transactions through subsidiaries and distributors in more than 40 countries. Aside from manufacturing, the company also provides repair and calibration services for their clients with regards to their products.
Ranking as of April 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Sonora Technology Co., Ltd. |
57.1%
|
| 2 | GRAS Sound & Vibration |
12.2%
|
| 3 | FAIST ANLAGENBAU GMBH. |
10.2%
|
| 4 | Eckel Industries Inc. |
10.2%
|
| 5 | Hottinger Brüel & Kjær |
6.1%
|
| 6 | IAC Acoustics |
4.1%
|
Derivation Method
The ranking is calculated based on the click share within the acoustic anechoic box page as of April 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
1 | 25.0% |
|
Denmark
|
1 | 25.0% |
|
Germany
|
1 | 25.0% |
|
Japan
|
1 | 25.0% |
122 products found
122 products
Shield Room Co., Ltd.
220+ people viewing
Standard Response
This is a simple radio anechoic chamber that prevents radio wave reflection within the shield room by uniformly pasting radio wave absorbers (ferri...
FT Works Ltd.
120+ people viewing
■Features FTW's FRP outer anechoic box is approximately 30 to 50% lighter in weight than a conventional all-metal anechoic box for the same size an...
Shield Room Co., Ltd.
150+ people viewing
Last viewed: 7 hours ago
Standard Response
■Shield box product description Since each customer has a different use, purpose, and installation location for shield boxes, all dimensions, struc...
Takachi Electric Industry Co., Ltd.
110+ people viewing
Last viewed: 1 day ago
This box has a double structure of a silicone waterproof gasket and an EMI shielding gasket, allowing for waterproofing and shielding. Ideal for CA...
Candox Systems Co., Ltd.
90+ people viewing
Last viewed: 1 day ago
Standard Response
■Summary This model can be used in a thermostat with an expanded temperature range of -40℃ to +85℃. ■Specifications/Examples ・Shield characterist...
Candox Systems Co., Ltd.
80+ people viewing
Standard Response
■Summary ・Entry model ideal for customers testing wireless equipment for the first time ・Although inexpensive, it has a sufficient shape and shie...
Candox Systems Co., Ltd.
90+ people viewing
Standard Response
■Summary A highly shielded box with a shielding effect of 60dB or more. Basically, it will be made in custom requests by users. Size (available in ...
2 models listed
Candox Systems Co., Ltd.
90+ people viewing
Last viewed: 13 hours ago
Standard Response
■Summary Coupling constants for each frequency and conversion values to electric field strength values are provided as reference values, and th...
Precise Gauge Co., Ltd.
170+ people viewing
Last viewed: 1 day ago
■Overview and features A completely darkened booth ideal for laser experiments. Once the booth door is closed, no laser light will leak outside, so...
Precise Gauge Co., Ltd.
150+ people viewing
Last viewed: 1 day ago
■Features ・A dark box with a top-opening lid. -Multiple 25mm pitch screws are placed on the surface plate. Can be customized. - Heat dissipation i...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM has made full use of its nearly 20 years of experience in developing and manufacturing electromagnetic shielding boxes to extend the frequen...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM has made full use of its nearly 20 years of experience in developing and manufacturing electromagnetic shielding boxes to extend the frequen...
TS S Japan Co., Ltd.
20+ people viewing
In 1997, Ramsey released a portable radio wave shielding box with a shielding glove, revolutionizing RF testing. Although it is a benchtop, it allo...
TS S Japan Co., Ltd.
20+ people viewing
By placing your smartphone or other wireless device in a radio shield box and closing the lid, it will be protected from all external signal source...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM has made full use of its nearly 20 years of experience in developing and manufacturing electromagnetic shielding boxes to extend the frequen...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM has made full use of its nearly 20 years of experience in developing and manufacturing electromagnetic shielding boxes to extend the frequen...
TS S Japan Co., Ltd.
10+ people viewing
In 1997, Ramsey released a portable radio wave shielding box with a shielding glove, revolutionizing RF testing. Although it is a benchtop, it allo...
TS S Japan Co., Ltd.
20+ people viewing
This is a model with a rack mount fixture that can be placed in a 19 inch rack. Not only can it be compactly stored in a rack, but it is also easy ...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM has made full use of its nearly 20 years of experience in developing and manufacturing electromagnetic shielding boxes to extend the frequen...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM has made full use of its nearly 20 years of experience in developing and manufacturing electromagnetic shielding boxes to extend the frequen...
TS S Japan Co., Ltd.
20+ people viewing
Last viewed: 1 day ago
In 1997, Ramsey released a portable radio wave shielding box with a shielding glove, revolutionizing RF testing. Although it is a benchtop, it allo...
TS S Japan Co., Ltd.
20+ people viewing
Last viewed: 1 day ago
This is a model with a rack mount fixture that can be placed in a 19 inch rack. Not only can it be compactly stored in a rack, but it is also easy ...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM has made full use of its nearly 20 years of experience in developing and manufacturing electromagnetic shielding boxes to extend the frequen...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM's millimeter wave model (millimetre wave compatible electromagnetic wave shield box) not only enables various evaluations in the development...
TS S Japan Co., Ltd.
10+ people viewing
Tens of thousands of Ramsey radio shielded boxes are currently in use around the world, and their design and technology are recognized as highly ef...
TS S Japan Co., Ltd.
20+ people viewing
Last viewed: 19 hours ago
This is a model with a rack mount fixture that can be placed in a 19 inch rack. Not only can it be compactly stored in a rack, but it is also easy ...
TS S Japan Co., Ltd.
20+ people viewing
TESCOM has made full use of its nearly 20 years of experience in developing and manufacturing electromagnetic shielding boxes to extend the frequen...
TS S Japan Co., Ltd.
10+ people viewing
Last viewed: 22 hours ago
TESCOM's millimeter wave model (millimetre wave compatible electromagnetic wave shield box) not only enables various evaluations in the development...
TS S Japan Co., Ltd.
20+ people viewing
Last viewed: 3 hours ago
Tens of thousands of Ramsey radio shielded boxes are currently in use around the world, and their design and technology are recognized as highly ef...
