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Semi-Anechoic Chambers

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Much like full anechoic facilities, semi-anechoic chambers (sometimes referred to as Hemi-Anechoic Chambers) are lined with absorbent materials, however the floor is left as a flat finish with no absorption. Semi-anechoic chambers are more common and still allow very precise measurements to be taken, but the free-field area is only half a sphere (or hemisphere, hence the name Hemi-Anechoic). Hemi-anechoic chambers offer an ideal solution to testing large or heavy items as there is no need for a specialised floor to cover any wedges found in full anechoic laboratories.

Although some design issues are overcome with semi-anechoic chambers, facilities are usually large in size and have complex requirements to suit the product being examined. In the case of taking acoustic measurements for a large generator as an example, it is not simply a case of placing the item in the middle of the lab and taking the necessary measurements. The following are just some of the elements which enable such a facility to operate effectively:

Silent ventilation system capable of passing large volumes of air into the hemi-anechoic chamber when an engine is running
Fuel system for powering the generator whilst on test
A silenced extraction system for removing all of the noxious fumes from the enclosure
Heating / cooling system to ensure that a constant temperature and humidity are kept inside the chamber to get the most consistent results
A control and monitoring system for engineers to use to effectively run the hemi-anechoic chamber
All the above (and many more possible options) need to be carefully considered at the planning stage of the hemi-anechoic enclosure in order to get the best possible results for the end-user.

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About us

QuietStar Ltd provides a comprehensive selection of products and services for industrial noise control and architectural acoustics. We supply and install sound-insulating solutions, including architectural acoustic doors and windows. Additionally, we offer acoustic packages tailored for heavy industries, serving facilities like factories and mechanical plants.

Moreover, we offer sound-insulating products designed for specialised acoustic environments. QuietStar complies with all relevant regulations, ensuring that our products meet the highest standards for both acoustic performance and design quality. We frequently create tailored acoustic environments for TV production rooms, radio studios, voiceover booths, as well as vehicle testing and audiology facilities.

Our Services Include:

Anechoic Test Chambers
At QuietStar, we offer a comprehensive turnkey service for acoustic testing facilities, encompassing fully anechoic and semi-anechoic test rooms. Our end-to-end design service begins with the initial concept and design overview, followed by manufacturing, delivery, installation, final testing, and commissioning of the acoustic testing facility.

Acoustic Doors
QuietStar is a UK leader in designing, manufacturing, and installing a wide range of acoustic doors tailored to meet various noise reduction needs. With extensive experience across acoustic markets, including music production, audiology testing, and industrial applications, we adapt our solutions to specific conditions, considering factors like building architecture, noise source, and desired sound attenuation levels. Whether you need a standard acoustic door for a recording studio or a large automated sliding door for a factory, we offer soundproof products that effectively address any noise control challenge, including fire-rated acoustic doors.

Industrial Acoustics
Industrial acoustics encompasses a diverse array of needs and specifications. We understand that some projects demand increased flexibility, particularly when dealing with either permanent structures or temporary setups, like noisy construction sites that may utilise scaffolding. As a result, we provide both fixed and temporary acoustic solutions to meet these varying requirements.

Acoustic Windows
By employing multiple panes of glass with thicknesses ranging from 6.8mm to 25mm, our soundproofing capabilities are significantly enhanced. We utilise a distinctive timber frame system that is decoupled from the host wall to reduce vibration transmission, ensuring an optimal acoustic seal for soundproof windows. Different pane thicknesses and varying air gaps are strategically combined for studio windows and glazed screens, tailored to the host wall's thickness, construction, and the desired level of sound insulation.

Audiology Rooms
At QuietStar, we provide a wide selection of both standard and custom audiology test rooms, standalone audiometric testing booths, and complete hearing testing suites. Our audiology rooms guarantee noise reduction levels from Rw 30dB to over Rw 65dB. Our in-house design team ensures top-quality acoustic performance, offering comprehensive design services and ongoing after-sales support.

… And more.

QuietStar provides a comprehensive service for acoustic testing facilities, featuring fully equipped anechoic and semi-anechoic test rooms. Our design process for acoustic testing facilities starts with an initial design assessment and concept, followed by manufacturing, delivery, installation, final testing, and commissioning of the facility.

We work closely with you to understand your needs, and our all-inclusive service guarantees that we create the ideal acoustic test facility tailored to your specifications, maximising space efficiency and ensuring the facility is purpose-built.