Abstract
It is sometimes important to know the sound power radiated from a sound source so that, for example, the solution noise abatement can be carried out on the basis of the sound power radiated. Measurement of the sound power in general is carried out in a reverberant enclosure. This measuring method is classed as an indirect one in that the sound power is obtained via the sound pressure level. Consequently, in order to determine the sound power radiated as precisely as possible, some measurement procedures for obtaining the space-average sound pressure have been devised. However, the procedure, which involves moving the measuring microphone from point to point, is extremely tedious. Accordingly, if the system from data acquisition to data processing is automated, the work required for obtaining the space-average sound pressure will be considerably reduced, as will the time required for processing the data. The development of an automatic measuring system for sound power is discussed and it is shown that the sound power obtained with the system devised agrees well with that obtained by more familiar means.
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