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Sound power is a measure of the acoustic power generated and radiated by a machine or tool. This measure characterizes and quantifies the sound source,
independently from the environment. Sound power measurements are used to certify tools towards specific ISO standards. Beyond certification on local markets and tool labelling according to regional regulations, accurate sound power measurements may have a striking impact on export sales and branding strategies. The following techniques are employed in sound power testing:
•Pressure methods based on ISO 3741, ISO 3744, ISO3745, ISO 3746, ISO 3747
•Intensity methods according to the ISO 9614 series,often used for in-situ testing
•Non-standardized array-based methods like holography