Sound intensity based sound power
Traditionally, to measure sound power, the noise source had to be placed in specially constructed rooms such as anechoic or reverberant chambers. Sound intensity, however, can be measured on a source in any sound field allowing sound power to be determined directly.
Because steady background noise makes no contribution to the sound power determined when measuring intensity over a closed surface, measurements on individual machines or components can be made even when all the others are radiating noise.
The sound intensity gives a measure of direction as well as of magnitude, it is also very useful when locating sources of sound. Therefore, the radiation patterns of complex vibrating machinery can be studied in situ.
System suggestion
Our software, Sound Power Using Sound Intensity Type 7882, enables sound power to be determined, stored and reported according to ISO 9614 Parts 1, 2 and 3, using dedicated templates. The hardware required is the same for all three standards.
To fulfil the requirements of the chosen standard, a dedicated template leads you through all the necessary steps by means of a task list. The task list reflects the similarities between standards, making for an intuitive user interface.
A portable, sound intensity analyzer system comprising the 2-channel sound level meter / analyzer, Sound Intensity Software BZ-7233 and a Sound Intensity Probe Kit Type 3654, is also ideal for conducting intensity measurements.
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