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A PU Sound Intensity Probe Designed for High Temperature Use
Technical Paper
2007-01-2336
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Normal microphones can't resist high temperatures. The recently developed particle velocity microphone, can resist temperatures up to 300 degrees Celsius (570 degrees Farenheit). Current R&D is focused on increasing the upper temperature of the sensor element to 600 degrees Celsius (1300 degrees Farenheit).
A sound pressure (p) sensitive system is created with a particle velocity sensor, when it is placed in a small (4cm in length and 5mm in diameter) standing wave tube. This sound pressure arrangement is combined with a particle velocity sensitive (u) element and thus creating a pu (intensity) probe. All components of this novel sensor are made with special heat resistant materials.
A model of the temperature dependence is derived and checked by measurements. The frequency response, polar pattern, selfnoise etc. of both pressure and velocity microphone are determined.
Authors
Citation
de Bree, H., Tijs, E., and Yntema, D., "A PU Sound Intensity Probe Designed for High Temperature Use," SAE Technical Paper 2007-01-2336, 2007, https://doi.org/10.4271/2007-01-2336.Also In
References
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- de Bree H.-E. The Microflown: An acoustic particle velocity sensor Acoustics Australia 31 91 94 2003
- Jacobsen Finn Liu Yang Near field acoustic holography with particle velocity transducers JASA 118 5 November 2005 3139 3144
- de bree H.E. et al. The sound pressure Microflown; a novel way of transducing sound pressure MME convention Sweden 2000
- The Microflown, E-book www.microflown.com
- Jacobsen Finn et al A note on the calibration of pressure-velocity sound intensity probes Jasa 2006
- Yntema D.R. et al. Fully integrated three dimensional sound intensity sensor MEMS 2007