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Sound Intensity
Measurement and analysis of acoustic energy flow
Sound intensity is a robust method for determining sound power in challenging acoustic environments, such as high background noise or rooms with poor acoustic properties.
It is well suited to in situ measurements, whether on the entire installation or on specific sections of the equipment.
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Sound Intensity – Measurement and analysis of acoustic energy flow
Sound intensity describes the flow of acoustic energy through a surface in a given direction. Unlike sound pressure, which is a scalar quantity (magnitude only), sound intensity provides information about both the magnitude and direction of the acoustic energy flow.
Sound intensity measurements are used to analyze the emission of sound from a source, identify dominant noise contributions, and determine sound power under conditions where the influence of the environment needs to be controlled or minimized.
What is evaluated in sound intensity?
Sound intensity measurements allow the evaluation of:
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The flow of acoustic energy through a surface
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The direction of sound propagation
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The contribution of different areas to the total sound emission
The objective is to analyze how acoustic energy is transmitted from a source and to provide detailed insight into its spatial distribution.
Measurement accuracy and standard compliance
Sound intensity measurements require dedicated instrumentation, including intensity probes, in accordance with the ISO 9614 series, which defines methods for determining sound power using sound intensity.
Frequency analysis must comply with IEC 61260, and the instrumentation used must ensure the required accuracy for measurements under real operating conditions.
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Sound power determination
Determination of sound power from sound intensity measurements, allowing the evaluation of a source’s emission under real operating conditions and with reduced influence of the environment. Read more...
Sound intensity mapping
Spatial analysis of sound intensity through measurements at multiple points or using scanning techniques, enabling the identification of sound emission distribution and the localization of areas with higher noise emission from the source. Read more...
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Solutions for sound intensity measurements
Professional sound intensity testing requires:
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Sound intensity probes
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Data acquisition and analysis systems
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Software for analysis and visualization of intensity maps
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Acoustic calibrators
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Phase calibration and verification tools
Integrated measurement systems enable detailed analysis of sound emission, supporting noise source identification, product optimization, and acoustic diagnostics in real operating conditions.
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Norsonic - a trusted and innovative leader in sound intensity applications
Norsonic delivers a comprehensive portfolio of instruments and systems dedicated to sound intensity. From handheld sound level meters to advanced multichannel solutions, our technology is engineered to meet the full range of acoustic measurement tasks, from basic sound insulation tests to complex analyses.
Intuitive software, flexible configuration, and powerful analysis tools provide efficient workflows and clear, reproducible reporting. Wireless operation and Wi-Fi connectivity reduce cabling and simplify logistics on site, while project management directly on the instrument helps optimise measurement campaigns and ensure consistent, reliable results.
