Calibration & Repair Services

We are a specialised company providing calibration and repair services for audiometric, acoustic and vibration instrumentation. Our service covers the UK, Ireland and beyond ‚operating from centres in Scotland, North East England and Ireland.

Acoustic Metrology Ltd (AML) is a UKAS accredited calibration laboratory No. 0798. This means that the calibration of the systems that we use is traceable to national primary standards. With AML you can be confident that your equipment is calibrated to the appropriate standards by trained engineers using accurate and efficient calibration systems.

We offer both laboratory and on-site audiometric calibration utilising the ADACS system. The ADACS system is unique to AML and offers unrivalled calibration accuracy and efficiency. We have partnership agreements with most of the major audiometric equipment suppliers and can calibrate and repair most makes of equipment currently in use.

If you require a quotation or further information please do not hesitate to contact us at: or on +44 (0)1698 208250

Experts in


AML has over 75 years collective experience of calibrating audiometric, acoustic and vibration equipment ensuring that your equipment is fully up to date and in the best working order. In addition we manage your calibration administration from annual reminders to logistics, reducing the burden on busy staff. Find out more…

Experts in


Repairs are carried out to the original manufactures specifications in our modern purpose-built laboratory. We pride ourselves in getting it right first time and all our repairs carry a 90 day warranty. Find out more…

Our Services

On-site and laboratory calibration

Our audiometric calibration system (laboratory and site) is based around our unique ADACS system.

This system can calibrate any type of audiometer from a hand-held screening device to a fully featured clinical instrument. The parameters measured are Frequency, Sound Pressure Level, Force Level, Narrow-Band Masking Level, Distortion and Attenuator Linearity.

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Routine Maintenance
We will carry out minor repairs (such as replacing headphone leads, cushions, batteries etc.) as part of the calibration process.

Laboratory Repair
A repair which involves dis-assembly of the instrument or the replacement of a faulty transducer will be carried out in the laboratory

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MES Testing

MES Testing to BS EN 62353:2014
All AML engineers are now equipped to carry out medical electrical safety testing to BS EN 62353.

This is a routine electrical safety test for equipment designed to IEC 60601 and is a more comprehensive test than a standard portable appliance test (PAT test).

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Prior to using the visiting service provided by AML, we were forced to ship our instruments to Dublin or the UK for service and calibration. Invariably this meant suspending our service during the shipping process and sometimes resulted in damage to our instruments during transportation. The on-site service and calibration offered by AML is much more convenient for us resulting in less down time and lower costs.It’s good to know that our instruments are calibrated and certified to the highest standards.- Cathal McGurgan, Sligo University Hospital, Ireland
We’ve worked with Acoustic Metrology for many years now and consider them an extremely reliable and responsive partner who understands us well and how we work. I’d have no hesitation recommending them as a calibration and repair company for audiological equipment given our past, current and hopefully futre relationship.- Adrian Carragher, Head of Audiology Service, NHS Ayrshire and Arran
Calibration – quick email. It was responded to straight away and within the space of 20 minutes we had booked that calibration in. And that’s key not just to me but for all of my colleagues throughout Specsavers – the annual calibration of equipment. Historically you send it away you haven’t got it. So you have to have equipment there to cover. Very quick easy email, we’ve got an engineer coming round within a week who will calibrate two units at once in the same day and I haven’t got to worry about it.- Mike Walker, Director of Hearing Services, Specsavers Worcester