How can we help you?

• Measure sound power level per EN ISO 3741, 3744 and 3746 at PCA AB 308 accredited laboratory
• Meet Machinery Directive 2006/42/EC and ErP regulation requirements for your HVACR equipment
• Obtain acoustic reports accepted by notified bodies throughout the European Union
• Order mobile acoustic measurements directly at your production facility
• Optimise product acoustics using detailed third-octave spectrum and vibration analysis

Acoustic Measurement Methods

COCH Laboratory performs acoustic testing using:

• EN ISO 3741 – reverberation room method (precision)
• EN ISO 3744 – enveloping surface method (accuracy class 2)
• EN ISO 3746 – simplified method (accuracy class 3)
• EN ISO 3747 – in-situ measurements (at client site)

Measured Quantities

• Sound power level LW [dB(A)] - required for CE declaration
• Sound pressure level LP [dB(A)] at 1 m distance
• Third-octave and octave spectrum (frequency analysis)
• Mechanical vibration level [mm/s] per ISO 10816

Applications and Legal Requirements

The Machinery Directive 2006/42/EC requires the declaration of sound power level in the machine manual and CE declaration. The ErP regulation imposes additional acoustic requirements for fans, air conditioners, and heat pumps.

On-Site Measurements

For large or heavy equipment where transport is impractical, COCH operates a mobile measurement station for on-site testing at client facilities throughout Poland.

Frequently Asked Questions