The microflown : a true particle velocity microphone; sound intensity application


Bree, Hans-Elias de (1998) The microflown : a true particle velocity microphone; sound intensity application. NAG Journaal . ISSN 1571-4233

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Abstract:The Microflown is world's first particle velocity microphone that enables numerous new acoustical applications, due to the combination of its unique acoustical performance and small dimensions. Several patents have been granted since its invention in 1994. This abstract will focus on one application: sound intensity measurements. The direct measurement of particle velocity makes it possible to measure sound intensity in one place. The advantage of this is that the complete audio band can be measured at once now, in the near field, far field and also both in reactive and nonreactive fields. With the use of the Microflown, the realisation of very small three dimensional sound intensity probes will become feasible soon. Some background information of the microflown concerning the manufacturing, signal and noise properties and preamplifiers will be presented.
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Electrical Engineering, Mathematics and Computer Science (EEMCS)
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