Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique

J.W. van Honschoten; W.F. Druyvesteyn; R. Raangs; G.J.M. Krijnen; M.C. Elwenspoek

Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique

J.W. van Honschoten, W.F. Druyvesteyn, R. Raangs, G.J.M. Krijnen, M.C. Elwenspoek

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

The Microflown is a thermal acoustic sensor which does not measure sound pressure but the accompanying particle velocity (see [1-5]). This particle velocity is deduced from a temperature difference between two heated wires. A drawback is the sensor’s lower signal-to-noise (S/N-) ratio at higher frequencies compared to pressure microphones. A method is presented to reduce the noise by utilisation of cross- instead of auto-correlation spectra of two Microflowns. Dependent on the number of data points used, improvements of the signal-to-noise-ratio as high as 30 dB have be attained. The bandwidth in which the sensor’s noise characteristics are comparable to those of current microphones, thus increases from about.

Original language	English
Title of host publication	Forum Acusticum Sevilla 2002
Subtitle of host publication	3rd European Congress on Acoustics, XXXIII Spanish Congress on Acoustics - TECNIACUSTICA 2002, Europan and Japanese Congress on Acoustis, 3rd Iberian Congress on Acoustics ; Sevilla, Spain, 16 - 20 September 2002
Editors	Antonio Calvo-Manzano
Place of Publication	Sevilla, Spain
Publisher	Sociedad Española de Acústica
Number of pages	6
ISBN (Print)	84-87985-06-8
Publication status	Published - 15 Sep 2002
Event	Forum Acusticum Sevilla 2002 - Sevilla, Spain Duration: 16 Sep 2002 → 20 Sep 2002

Conference

Conference	Forum Acusticum Sevilla 2002
Country/Territory	Spain
City	Sevilla
Period	16/09/02 → 20/09/02

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van Honschoten, J. W., Druyvesteyn, W. F., Raangs, R., Krijnen, G. J. M., & Elwenspoek, M. C. (2002). Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique. In A. Calvo-Manzano (Ed.), Forum Acusticum Sevilla 2002: 3rd European Congress on Acoustics, XXXIII Spanish Congress on Acoustics - TECNIACUSTICA 2002, Europan and Japanese Congress on Acoustis, 3rd Iberian Congress on Acoustics ; Sevilla, Spain, 16 - 20 September 2002 Sociedad Española de Acústica.

van Honschoten, J.W. ; Druyvesteyn, W.F. ; Raangs, R. et al. / Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique. Forum Acusticum Sevilla 2002: 3rd European Congress on Acoustics, XXXIII Spanish Congress on Acoustics - TECNIACUSTICA 2002, Europan and Japanese Congress on Acoustis, 3rd Iberian Congress on Acoustics ; Sevilla, Spain, 16 - 20 September 2002. editor / Antonio Calvo-Manzano. Sevilla, Spain : Sociedad Española de Acústica, 2002.

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title = "Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique",

abstract = "The Microflown is a thermal acoustic sensor which does not measure sound pressure but the accompanying particle velocity (see [1-5]). This particle velocity is deduced from a temperature difference between two heated wires. A drawback is the sensor{\textquoteright}s lower signal-to-noise (S/N-) ratio at higher frequencies compared to pressure microphones. A method is presented to reduce the noise by utilisation of cross- instead of auto-correlation spectra of two Microflowns. Dependent on the number of data points used, improvements of the signal-to-noise-ratio as high as 30 dB have be attained. The bandwidth in which the sensor{\textquoteright}s noise characteristics are comparable to those of current microphones, thus increases from about.",

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van Honschoten, JW, Druyvesteyn, WF, Raangs, R, Krijnen, GJM & Elwenspoek, MC 2002, Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique. in A Calvo-Manzano (ed.), Forum Acusticum Sevilla 2002: 3rd European Congress on Acoustics, XXXIII Spanish Congress on Acoustics - TECNIACUSTICA 2002, Europan and Japanese Congress on Acoustis, 3rd Iberian Congress on Acoustics ; Sevilla, Spain, 16 - 20 September 2002. Sociedad Española de Acústica, Sevilla, Spain, Forum Acusticum Sevilla 2002, Sevilla, Spain, 16/09/02.

Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique. / van Honschoten, J.W.; Druyvesteyn, W.F.; Raangs, R. et al.

Forum Acusticum Sevilla 2002: 3rd European Congress on Acoustics, XXXIII Spanish Congress on Acoustics - TECNIACUSTICA 2002, Europan and Japanese Congress on Acoustis, 3rd Iberian Congress on Acoustics ; Sevilla, Spain, 16 - 20 September 2002. ed. / Antonio Calvo-Manzano. Sevilla, Spain : Sociedad Española de Acústica, 2002.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique

AU - van Honschoten, J.W.

AU - Druyvesteyn, W.F.

AU - Raangs, R.

AU - Krijnen, G.J.M.

AU - Elwenspoek, M.C.

PY - 2002/9/15

Y1 - 2002/9/15

N2 - The Microflown is a thermal acoustic sensor which does not measure sound pressure but the accompanying particle velocity (see [1-5]). This particle velocity is deduced from a temperature difference between two heated wires. A drawback is the sensor’s lower signal-to-noise (S/N-) ratio at higher frequencies compared to pressure microphones. A method is presented to reduce the noise by utilisation of cross- instead of auto-correlation spectra of two Microflowns. Dependent on the number of data points used, improvements of the signal-to-noise-ratio as high as 30 dB have be attained. The bandwidth in which the sensor’s noise characteristics are comparable to those of current microphones, thus increases from about.

AB - The Microflown is a thermal acoustic sensor which does not measure sound pressure but the accompanying particle velocity (see [1-5]). This particle velocity is deduced from a temperature difference between two heated wires. A drawback is the sensor’s lower signal-to-noise (S/N-) ratio at higher frequencies compared to pressure microphones. A method is presented to reduce the noise by utilisation of cross- instead of auto-correlation spectra of two Microflowns. Dependent on the number of data points used, improvements of the signal-to-noise-ratio as high as 30 dB have be attained. The bandwidth in which the sensor’s noise characteristics are comparable to those of current microphones, thus increases from about.

M3 - Conference contribution

SN - 84-87985-06-8

BT - Forum Acusticum Sevilla 2002

A2 - Calvo-Manzano, Antonio

PB - Sociedad Española de Acústica

CY - Sevilla, Spain

T2 - Forum Acusticum Sevilla 2002

Y2 - 16 September 2002 through 20 September 2002

ER -

van Honschoten JW, Druyvesteyn WF, Raangs R, Krijnen GJM, Elwenspoek MC. Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique. In Calvo-Manzano A, editor, Forum Acusticum Sevilla 2002: 3rd European Congress on Acoustics, XXXIII Spanish Congress on Acoustics - TECNIACUSTICA 2002, Europan and Japanese Congress on Acoustis, 3rd Iberian Congress on Acoustics ; Sevilla, Spain, 16 - 20 September 2002. Sevilla, Spain: Sociedad Española de Acústica. 2002

Selfnoise Reduction in Acoustic Measurements with a Particle Velocity Sensor by Means of a Cross-Correlation Technique

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