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Sound Power Testing

The LMS Acoustics solutions deliver the required testing efficiency for increased testing and quality control. Beyond accurate measurements, LMS tools and services help reach sound power targets with advanced techniques such as airborne source quantification and sound source localization.

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 labeling according to regional regulations, accurate sound power measurements may have a striking impact on export sales and branding strategies. It is crucial therefore not to exceed the allowed sound power level in many industries. Moreover, lower sound power often represents a competitive advantage.

Sound power testing is used across a wide variety of industries such as white goods, office equipment, hand-held power tools or off-highway vehicle industries.

The following techniques are employed in sound power testing:

Pressure methods based on ISO 3741, ISO 3744, ISO 3745, 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

The LMS Test.Xpress platform is the ideal solution for ISO certification testing according to the standards ISO 3741, ISO 3744, ISO 3745, ISO 3746, ISO 3747 (pressure-based) and ISO 9614-1 and ISO 9614-2 (intensity-based). The LMS Test.Xpress software also supports industry-specific standards like ISO 7779, ISO 6395, ISO 6396 and lets manufacturers qualify products for compliance with the 2000/14/EC directive. The process is completed with detailed report in MS Excel and/or Word that contains all ISO required information.

Features

Commercial off-the-shelf or customizable solution for industry or customer-specific requirement
Focus on productivity for every industry standard
Integrated reporting with export to MS office

Benefits

Accurately and efficiently measure sound pressure levels
A large range of ISO and local standards are supported, according to specific industry requirements
Single platform from sound power level measurements to advanced sound engineering tasks

Covering a range of industries, LMS application cases let you discover how LMS solutions help our customers solve their real-life engineering challenges.

LMS helps BSH Bosch und Siemens Hausgeräte GmbH dish up superior dishwashers

Huge robotic arms move in precise synchronicity as they place the shiny metal sheets into the molds from which they will emerge as stainless steel dishwasher tubs, ready to move to the next station in the impressive BSH assembly line. Located in Dillingen, Germany, it is the biggest dishwasher plant in the world –approx. 2 million dishwashers are produced here annually.

UTAC accelerates noise and vibration testing with LMS Test.Lab

UTAC, a leading company in testing and certification services, deployed LMS Test.Lab in its environmental laboratory for acoustic testing, citing its testing speed, engineering capabilities, precision, and ease of use as key differentiators. UTAC estimates that testing campaigns run with LMS Test.Lab deliver a 30% time gain compared to tests with other tools. Thanks to LMS Test.Lab, UTAC can offer its customers a precise diagnosis of acoustic problems.

Sound power testing for ISO certification

Sound power testing for ISO certification acoustic metric 1

Sound power is an acoustic metric that represents the total noise or acoustic power generated by a specific machine or tool. It corresponds to an intrinsic acoustic property of the equipment itself and is not influenced by the environment the equipment is operating in. Sound power values can be used to compare different machines and products in an absolute way, to do competitive benchmarking or to validate the impact of design modifications on a product’s acoustic profile.

Images


	Testing on washing machines requires a long measurement time. LMS Test.Lab supports online sound power level calculcation over any time interval.		The software flexibility permits real-time processing as well as visualization of sound power and other data during the acquisition.		Compliance with EC/2000/14 is mandatory for many outdoor equipment manufacturers. LMS provides solutions for both quantification and engineering.

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