Good Vibrations

From: Bruel & Kjaer UK
Published: Tue Apr 07 2009

Testing the seriously hazardous effects from vehicle seat and floor vibration is now much simpler with Brüel & Kjær’s new SEAT measurement software for its 4447 Human Vibration meter.

With this major update the 4447 makes the assessment of health risks to humans - posed by exposure vibration at work - easier to calculate, as it can measures SEAT (Seat Effective Amplitude Transmissibility) factors to determine the ratio between the vibration levels measured on the seat - and on the floor - then display the SEAT factor. This factor ensures the seat is constructed under specific operational conditions and the finished product complies with strict EU regulations for manufacturers, including EU Directive 2002/44/EC.

Brüel & Kjær’s 4447 analyser is a portable system developed using input from several groups concerned about the effects of human vibration, so it is ideal for consultants working with measurements of - and risk evaluations caused by - exposure to occupational vibration, departments for occupational health, manufacturers of building machinery, freight vehicles and other machinery causing vibration, manufacturers of anti-vibration pads, seats and personal protection equipment.

The meter also offers a new logging capability, which records RMS, MTVV, Peak and VDV values at 1 second intervals, giving the tester a more detailed picture of the vibration exposure. Depending on the variant amount of data recorded, the 4447’s memory stores several hours of logging data, providing information for a much longer working period, which can then be analysed via the Vibration Explorer PC software.

For more information about the 4447 Human Vibration meter, please click here or contact Bruel & Kjaer UK on 01438 739 000.

Bruel & Kjaer UK is also running a Human Vibration training course during May, for more information please
Click here


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 or email:

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: calendar

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

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 900 employees and sales offices in 55 countries and is a subsidiary of UK-based Spectris plc. ( Spectris has annual sales of £668m and employs around 5,500 people worldwide in its 13 business units.

For additional information please contact:
Heather Wilkins
Marketing Coordinator
Bruel & Kjaer UK Ltd
Telephone: 01438 739 000
Company: Bruel & Kjaer UK
Contact Name: Heather Wilkins
Contact Email:
Contact Phone: 01438 739 000

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