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Sound Power
Measurement and determination of sound emission
Sound power is the total amount of acoustic energy emitted by a source, independent of the acoustic environment in which it is located. It is a fundamental parameter for characterizing the acoustic performance of products such as machinery, household appliances, and industrial equipment.
The purpose of sound power measurements
Sound power measurements are used to determine the noise emission of a source under defined and standardized conditions, enabling comparison between products and verification of compliance with regulatory requirements or technical specifications.
What is evaluated in sound power?
Sound power measurements allow the evaluation of:
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The total acoustic energy emitted by a source
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The distribution of acoustic energy across frequency
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The sound emission of a source independently of the acoustic environment in which it is located
The objective is to quantify the sound emission of a source in a reproducible manner and provide a reliable basis for comparison and certification, as well as for its use in further acoustic studies, such as sound propagation in specific environments.
Measurement accuracy and standard compliance
Reliable sound power measurements require Class 1 instrumentation compliant with IEC 61672. Frequency analysis must comply with IEC 61260.
Sound power determination is carried out in accordance with international standards such as the ISO 3740 series for sound pressure-based methods and ISO 9614 for sound intensity-based methods.
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Sound power determination in controlled environments
Determination of sound power levels under controlled acoustic conditions, such as reverberation rooms or anechoic chambers, which limit the influence of the environment and ensure reproducibility and comparability of results. This approach is particularly suitable for standardized testing and product certification. Read more...
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Sound power determination in situ
Determination of sound power directly at the source location, under real operating conditions, using methods that take into account or even minimize the influence of the environment, such as those based on sound intensity. This approach allows the evaluation of sound emission in representative operating conditions, especially when testing in controlled environments is not feasible. Read more...
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Solutions for sound power measurements
Professional sound power testing requires:
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Class 1 sound level meters
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Sound intensity probes
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Multi-channel data acquisition systems
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Data analysis and reporting platforms
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Reference Sound Source
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Acoustic calibrators
Integrated measurement systems enable accurate determination of sound power, supporting product development, regulatory compliance, and acoustic optimization.
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Norsonic - a trusted and innovative leader in sound power applications
Norsonic delivers a comprehensive portfolio of instruments and systems dedicated to sound power. 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.
