About us32


Acoustic Test Fixture Hearing Protectors

Founded in 1994 by Danish acoustics pioneer Gunnar Rasmussen, GRAS Sound & Vibration is a worldwide leader in the sound and vibration industry. We develop and manufacture state-of-the-art measurement microphones and related equipment to industries where acoustic measuring accuracy and repeatability is of utmost importance. This includes applications and solutions for customers within the fields of aerospace, automotive, audiology, consumer electronics, and other high-demanding industries.

Our measurement microphones are developed to support critical areas of R&D, QA and production and therefore must undergo the most thorough tests. Using a series of “Highly Accelerated Life Tests”, GRAS microphones are designed to live up to the high quality, durability and accuracy that our customers have come to expect and trust.

GRAS is represented through subsidiaries and distributors in more than 40 countries.




GRAS Sound & Vibration UK Ltd was launched in July 2014 as the new UK subsidiary of GRAS Sound & Vibration A/S in Denmark, a world leading manufacturer of microphones. We set up GRAS UK to both help us to better serve our UK clients and as a key strategic element of our plan to increase UK market share.

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  John Wightman
  Applications Engineer

John joined GRAS UK in September 2018. Prior to joining the team, John was Business Development Manager at Volkswagen Commercial Vehicles. Talking about his new role, John says: “My primary responsibility is to work closely with both new and existing customers to understand their requirements and specify the best possible GRAS solution for each application, as well as to ensure a high level of service and support.”

John has further strengthened the UK sales team with his wealth of knowledge and enthusiasm for acoustics. He's also renowned for providing donuts and sweet treats on his customer visits!

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  Philippa Wolfarth
  Sales & Marketing

Philippa brings considerable business development expertise to her role having worked in advertising sales during her early career and later as a Business Development Manager at Cromwell Tools selling a large portfolio of industrial products. 

Very much a people person, Philippa spent four years in Ho Minh City, Vietnam where she taught English as a foreign language before returning to the UK in 2017 and joining the GRAS UK team.  

Philippa plays a key role in the UK sales team, looking after both new and existing accounts, as well as coordinating marketing activities and events. 

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Paul Rubens
Managing Director


Paul has worked in the field of noise and vibration for many years and has extensive experience in the health, safety and environmental technology marketplaces across Europe, Asia and the Americas. He spent over ten years as Managing Director of one of the world's most successful monitoring instrumentation companies in this field.

He now specialises in helping businesses grow into exciting new areas and has a proven track record in setting up subsidiaries, helping European-based businesses expand internationally and American and Asian businesses grow within Europe.

Paul also has wide-ranging experience of working with the UK government, having led an environmental trade mission for UK trade and investment to Taiwan in 2007 and the first of a new series of trade missions to China initiated by the Prime Minister in 2008.

He holds an honours degree in physics, an HND in electronics and a diploma in mathematics.

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John Shelton
Technical Manager


John Shelton holds an Honours degree in Acoustical Engineering, and a Masters degree in Sound & Vibration Studies, from ISVR in Southampton.

After a short time developing loudspeakers at Goodmans, he joined Bruel & Kjaer UK as an area sales engineer. Over the nine years that followed, he specialised in sound intensity and source location techniques, as well as managing technical sales across the UK.

Two years at Brüel & Kjaer in Denmark gave him experience in VXI-based virtual instrumentation, and whetted his appetite for software measurement solutions, taking responsibility for worldwide sales & marketing.

John is an active member of the Institute of Acoustics, and sits on several national committees and working groups on measurement & instrumentation.

A keen racing dinghy sailor, John has won several National & European titles on the water, and is also a keen flat-earth audiophile.


In 2014, GRAS and their UK distributor, AcSoft Ltd., invested in a joint venture to form GRAS UK or, more officially, "GRAS Sound & Vibration UK Ltd.". GRAS UK further builds the international business of GRAS and runs alongside current ventures in the USA, China and Germany. This was a major step for GRAS to further increase market share in the UK. AcSoft traditionally worked in the Automotive and Aerospace marketplaces and having a dedicated sales facility allow GRAS to also focus on other industry sectors like environmental and laboratories.

For full acoustic system enquiries, please contact our system specialists.

At GRAS we pride ourselves in our worldwide reputation for product innovation. We understand the needs of our customers and strive to ensure that our products meet both current and future market needs.

For enquiries and support on all GRAS products, please contact:

GRAS Sound & Vibration UK Ltd.
Building 115
Bedford Technology Park
Bedford MK44 2YA

Tel: 01234 639552 


We were founded in 1994 by Danish acoustics pioneer Gunnar Rasmussen who for more than 60 years has contributed to the world of sound and vibration with his unique ideas and designs. In 1956 Mr. Rasmussen designed the first reproducible 1” condenser measurement microphone. Mr. Rasmussen’s ingenuity soon led to the world’s most popular and probably most copied acoustic sensor: The 1/2” measurement microphone. Then the 1/4” and 1/8” microphones followed with outstanding dynamic and high-frequency capabilities that made high-definition diagnostics of impulse noise possible. Many variants have been made available over the years, all based on Gunnar Rasmussen’s original 1” pressure microphone design.


As a family owned company we safeguard our heritage by constantly striving to push the boundaries of what is possible and help our customers improve their products. This is why we have the industry’s most advanced microphones – a broad range of high-quality microphones for general acoustic applications complemented by an even broader range of highly specialized microphones and test solutions developed and fine-tuned to match specific challenges. 

This is a reflection of our unique willingness to help solve our customers’ measurement needs and provide solutions for tomorrow. Listening to our customers is at the core of who we are.


Our measurement microphones are designed to support critical areas in our customers’ R&D, QA and Production Line testing. Using Highly Accelerated Lifetime Tests (HALT) we ensure that our microphones perform optimally in real-life situations and retain the long-term stability that is crucial for trustworthy measurement results. 

All our microphones are made in Denmark from stainless steel and in a quality that allows for a 5 year warranty.

GRAS is ISO 9001:2015 and ISO 17025:2015 certified.


GRAS is represented worldwide in more than 40 countries by subsidiaries and distributors. Whether you are searching for a multi-channel solution or just a replacement microphone for your sound level meter GRAS will help solve your needs.
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