About Us

About Racal Acoustics

Racal Acoustics has a long history in the design, development and manufacture of hearing protection focused audio ancillary equipment for the world’s military market. Racal Acoustics is part of the INVISIO Group.

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Our Capabilities

Our design, engineering, manufacturing, prototyping and supply teams work collaboratively to develop, deliver and support the current and future audio ancillary needs of our customers. Product concept, design, prototyping, test, manufacture and verification are integral aspects of our full product development and integration process.


Our History

Our pedigree can be traced back as far as 1911, during the pioneering days of radio communication. From these origins, we have continued to innovate our products to meet ever-increasing demands for advanced-technology within an evolving marketplace.



The RA5100 is here

Racal Acoustics launches new tactical headset. The RA5100 is an extremely versatile headset for both in-vehicle and on-foot missions designed to cater for all types of hearing protection scenarios.



INVISIO Acquires Racal

Racal Acoustics is acquired by INVISIO, a global market leader within advanced communication and hearing protection systems. The two world class experts join forces to develop industry-leading hearing protection and communication solutions.


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RA4000 is built on a fully digital architecture, using advanced digital signal processing (DSP) and a software defined feature-set to deliver high levels of performance for demanding applications.


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Queen’s Award

In 2010, Racal was honoured with a Queen’s Award for ‘Enterprise – International Trade’ after increasing overseas revenues by 124% in three years.


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In-The-Ear Headset

The Frontier product range, with custom ear mould ear plugs, was developed and deployed in 2009 in super-quick time to provide the UK MoD with Personal Hearing Protection.


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Raptor Headset

Raptors are in wide use with the US Department of Defense and the US Marine Corps, providing communications, hearing protection and audio situational awareness for dismounted infantry and in transit vehicles.


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Harrow Relocation

Racal’s UK facility moved to larger premises at its current site in Harrow during the 1990s, merging its two facilities from the nearby towns of Watford and Wembley.


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Active Noise Reduction (ANR)

During the 1980s Racal pioneered early development in Active Noise Reduction (ANR). ANR cancels unwanted noise signals by superimposing an identical signal in antiphase, thereby significantly reducing noise levels at the ear.


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Clansman Headset

The Clansman headset was developed in the 1960s for use in armoured vehicles and came complete with a Press-To-Talk (PTT) switch.


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Larkspur Headset

The Larkspur headset was developed for use by infantry soldiers and remained the communications standard for the British Army through to the 1960s when it was replaced by Clansman.


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Racal Formation

Racal was formed in 1950 by Raymond Brown and George ‘Jock’ Calder Cunningham. The focus of the company was on high frequency radio communication equipment.


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S G Brown

In 1911 S.G. Brown, as the company was then known, pioneered electro-acoustic technology by manufacturing the Type ‘A’ reed headphone which became famous throughout the world.

Join Our Team


Racal Acoustics has a culture where high transparency, competency, teamwork, and employee satisfaction is a focus. We offer you a challenging job in a highly enthusiastic and international atmosphere. With us, you will develop professionally as well as personally.

Open positions

Click here to see our current vacancies at the INVISIO Group.

Unsolicited applications

We always want to meet talented and skilled professionals who wish to join our team. You are welcome to send an unsolicited application and CV to sinead.moss@racalacoustics.com

About Us

Safety & Quality

Racal Acoustics has a culture of Quality Assurance built up over many years of using bespoke test equipment, and ensuring that our outsource partners have high levels of quality adherence, process, control and assurance in their operations.

Sustainability and safety are integral to our business and design process.

We are committed to comply with all relevant Quality, Health, Safety & Environmental legislation, are fully compliant to all regulatory compliance requirements and certified to ISO9001 and ISO14001.

Supporting Documentation
ISO 9001 certificate
ISO 14001 certificate
Supplier Code of Conduct (UN GC)

Our Products

We develop customisable solutions tailored specifically to exact end user applications for use in tracked, wheeled vehicles, dismounted and tactical applications.

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Our team is here to help and answer all your questions. We look forward to hearing from you.