ScopeSound power — enveloping surface engineering method
ISO 3744 specifies the engineering method for determining sound power and sound energy levels using sound pressure measurements obtained on an imaginary surface (hemispherical or parallelepiped) surrounding a noise source. This method is widely used for in-situ testing of machinery, industrial equipment, and large installations where reverberation room testing is impractical. It provides a practical balance between accuracy and field applicability, making it suitable for machinery compliance testing, environmental noise assessments, and product CE marking requirements across the EU. ISO 17025 accreditation confirms laboratory proficiency in sound field measurement, environmental parameter correction, and uncertainty quantification for this complex measurement method.
What it measures
- Sound power level (Lw) using enveloping surface pressure data
- A-weighted and frequency-weighted sound power
- Octave and one-third-octave band sound power (63 Hz to 8 kHz)
- Environmental and measurement corrections
- Sound power directivity and spatial variability
Showing 801–825 of 1,868 labs
Intek
ActiveIntertek Caleb Brett GERMANY
ActiveIntertek Consumer Goods
ActiveIntertek Deutschland
ActiveIntertek Polychemlab
ActiveIntona
ActiveIsserstedt Prüfmaschinen
ActiveIstituto Giordano SpA
ActiveJ B-Monitor
ActiveJCS Technology
ActiveJOMA INGENIERÍA Y MONTAJES
ActiveJackson and Keay
ActiveJaver Labs
ActiveJohnson and Allen
ActiveJohs. Boss
ActiveJurjanz
ActiveK B Calibration Services
ActiveNo matching labs found.