Suggestions for change to ISO 9614
Keywords:
acoustic intensity measurement, measurement standards, ISO 9614, Sound power measurement, semi anechoic chamber, pressure-pressure finite difference probe system, real time band analysis, surface pressure-intensity indicatorAbstract
A Sound power measurement within a small semi anechoic chamber was undertaken in accordance with ISO Draft Standard 9614 employing a pressure-pressure finite difference probe system with real time band analysis. It was found that F2, designed as an overall surface pressure-intensity indicator, was negative in a particular low frequency band. This result was inconsistent to it's ultimate use within a qualification criterion and in consequence an investigation into the cause was undertakenDownloads
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