Reduction of fan noise bymeans of (circular) side-resonators; theory and experiment

M.J.J. Nijhof; Ysbrand H. Wijnant; Andries de Boer; W.M. Beltman

Reduction of fan noise bymeans of (circular) side-resonators; theory and experiment

M.J.J. Nijhof
, Ysbrand H. Wijnant
, Andries de Boer
, W.M. Beltman

Faculty of Engineering Technology

Research output: Contribution to conference › Paper

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Abstract

One of the main noise sources in computers are the cooling fans. An important aspect of the noise they generate is tonal noise produced at the rotational frequency of the fan, the blade passing frequency (BPF), and its higher harmonics. Previous research pointed out that so-called side resonators can be applied successfully to reduce this tonal noise. A variety of side resonator geometries is available. A model describing viscothermal wave propagation in a circular side-resonator and the connected duct and the preliminary results of a parameter study of that model where presented previously. The experimental verification of the model is presented here.

Original language	Undefined
Pages	403-416
Publication status	Published - 2004
Event	2004 International Conference on Noise and Vibration Engineering, ISMA 2004 - Leuven, Belgium Duration: 20 Sept 2004 → 22 Sept 2004 http://past.isma-isaac.be/isma2004

Conference

Conference	2004 International Conference on Noise and Vibration Engineering, ISMA 2004
Abbreviated title	ISMA
Country/Territory	Belgium
City	Leuven
Period	20/09/04 → 22/09/04
Internet address	http://past.isma-isaac.be/isma2004

Keywords

IR-58873

Access to Document

Nijhof04ISMA28

Cite this

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title = "Reduction of fan noise bymeans of (circular) side-resonators; theory and experiment",

abstract = "One of the main noise sources in computers are the cooling fans. An important aspect of the noise they generate is tonal noise produced at the rotational frequency of the fan, the blade passing frequency (BPF), and its higher harmonics. Previous research pointed out that so-called side resonators can be applied successfully to reduce this tonal noise. A variety of side resonator geometries is available. A model describing viscothermal wave propagation in a circular side-resonator and the connected duct and the preliminary results of a parameter study of that model where presented previously. The experimental verification of the model is presented here.",

keywords = "IR-58873",

author = "M.J.J. Nijhof and Wijnant, \{Ysbrand H.\} and \{de Boer\}, Andries and W.M. Beltman",

year = "2004",

language = "Undefined",

pages = "403--416",

note = "2004 International Conference on Noise and Vibration Engineering, ISMA 2004 ; Conference date: 20-09-2004 Through 22-09-2004",

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TY - CONF

T1 - Reduction of fan noise bymeans of (circular) side-resonators; theory and experiment

AU - Nijhof, M.J.J.

AU - Wijnant, Ysbrand H.

AU - de Boer, Andries

AU - Beltman, W.M.

PY - 2004

Y1 - 2004

N2 - One of the main noise sources in computers are the cooling fans. An important aspect of the noise they generate is tonal noise produced at the rotational frequency of the fan, the blade passing frequency (BPF), and its higher harmonics. Previous research pointed out that so-called side resonators can be applied successfully to reduce this tonal noise. A variety of side resonator geometries is available. A model describing viscothermal wave propagation in a circular side-resonator and the connected duct and the preliminary results of a parameter study of that model where presented previously. The experimental verification of the model is presented here.

AB - One of the main noise sources in computers are the cooling fans. An important aspect of the noise they generate is tonal noise produced at the rotational frequency of the fan, the blade passing frequency (BPF), and its higher harmonics. Previous research pointed out that so-called side resonators can be applied successfully to reduce this tonal noise. A variety of side resonator geometries is available. A model describing viscothermal wave propagation in a circular side-resonator and the connected duct and the preliminary results of a parameter study of that model where presented previously. The experimental verification of the model is presented here.

KW - IR-58873

M3 - Paper

SP - 403

EP - 416

T2 - 2004 International Conference on Noise and Vibration Engineering, ISMA 2004

Y2 - 20 September 2004 through 22 September 2004

ER -