Versatile Surveying with a Hand-Held Sound Intensity System

Assessing the power and location of noise sources has become easier with a unique system available from Brüel & Kjær, which uses sound intensity techniques.

This complete system - 2270-G - consists of a hand-held sound level meter, sound intensity software, and a sound intensity probe. It is unique in providing on-screen camera pictures of the measurement object, and clearly displaying coloured sound power contours over the image, as well as providing reporting capabilities – all in a hand-held device.

The system packages the best technique to perform sound power measurements in the field with a dedicated configuration that reduces the time and effort involved. Being battery-operated and highly portable, it allows just one person to make sound intensity measurements complying with the IEC 61043 sound intensity standard.

Excellent portability makes it ideal for any kind of survey work, from quickly determining noise sources inside trains or aeroplanes, to assessing the sound power of consumer goods and machinery during development.

For manufacturers of products such as washing machines, lawn mowers, and electric motor devices – who are facing increased pressure to fulfil national and international standards on noise – this system is an ideal development tool.

It also enables manufacturers to investigate and assess individual component parts such as those that come from sub-suppliers, further helping to predict noise output and ensure final products comply with international noise level standards.

Data from 2270-G can be exported to the Brüel & Kjær PULSE platform of analysis software and displayed as 2D and 3D maps, and the latest version fulfils the sound intensity-based standards for sound power determination (ISO-9614-1, ISO-9614-2, ANSI S12.12, ECMA 160).

For further ease of use, the system utilises a proprietary phase-calibration technique that allows users to make all measurements using just a single spacer between the two microphones on the sound intensity probe, covering a frequency range from 50 Hz to 10 kHz.

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