Brüel & Kjær Sound & Vibration Measurement A/S

Made to measure


Carrying out sound insulation measurements is set to become much simpler for building acoustic practitioners with Brüel & Kjær’s new Power Amplifier: 2734-B.

As building acoustic assessments are now used widely to certify rooms for their intended use, diagnose noise nuisance issues and improve music or theatre performing spaces, the job of measuring sound insulation or reverberation time has become almost a weekly or even daily task for acoustic practitioners.

Designed to meet this increasing need for smaller, more efficient building acoustic tools, Brüel & Kjær’s 2734-B has a high power output which delivers up to 500W to the associated sound source and the unit weighs less than 7 kilograms. The class D amplifier has been housed in a robust, hard wearing flight case making it suitable for the rigours of transportation and operation in dusty construction environments.

Fully compatible with Brüel & Kjær’s range of omni-directional sound sources used in field based building acoustic measurement, the amplifier has a built-in pink and white noise generator, which can be controlled manually or by the wireless remote control option for the Type 2250, 2270 and 2260 hand-held analysers. Wireless transmission of the test signal from the measuring instrument to the amplifier using the UL-0256 wireless accessory option allows a simple and cable free measurement process.

Calibrated controls and level indicator lamps ensure reproducing previous amplifier settings is clear and easy, whilst the indicator lamps also serve to protect the sound source from excessive signal levels.

Brüel & Kjær’s 2734-B Power Amplifier is available now. For further information please visit

About Brüel & Kjær
Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration solutions for use in a wide range of applications including: environmental noise measurements, building acoustics, vibration measurements and quality control for use in the automotive, aerospace and consumer industries, as well as by local authorities.

We design and manufacturer sound level meters, microphones and accelerometers, conditioning amplifiers, calibrators, noise and vibration analysers and software. To see our full range and for more information, please visit or contact our sales team: telephone +44 (0) 1438 739 000

Brüel & Kjær also runs a variety of training courses throughout the year, from basic introductions on noise and it’s effects to more specialised classes teaching customers how to get the most out of their equipment. To see our full training course calendar, visit:

Free, online training courses - conducted by our expert engineers - run throughout the year too. For registration details and the latest planned web training sessions, visit:

Bruel & Kjaer UK has its own Service Centre which is UKAS accredited to the international standard ISO/IEC 17025, ensuring traceable or accredited calibration for equipment. To book a service or for more information, please contact our service department on +44 (0) 1438 739 100 or visit:

Brüel & Kjær has 1150 employees, with sales offices in 55 countries. Brüel & Kjær is a subsidiary of UK-based Spectris plc ( which has annual sales of £787m and employs around 6,000 people worldwide in its 13 business units.

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