Title:
FAN MUFFLING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/217819
Kind Code:
A1
Abstract:
The present invention provides a fan muffling system with which narrow-band sounds generated by a fan in a plurality of discrete frequencies can be muffled while the air quantity of the fan is ensured. The fan muffling system has a fan and an acoustic resonance structure, the acoustic resonance structure being disposed in a near-field area of sounds generated by the fan.
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Inventors:
HAKUTA SHINYA (JP)
OHTSU AKIHIKO (JP)
YAMAZOE SHOGO (JP)
OHTSU AKIHIKO (JP)
YAMAZOE SHOGO (JP)
Application Number:
PCT/JP2020/013040
Publication Date:
October 29, 2020
Filing Date:
March 24, 2020
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
F04D29/52; F04D29/66; G10K11/16; G10K11/172
Foreign References:
| JP2008058389A | 2008-03-13 | |||
| JP2007163685A | 2007-06-28 | |||
| JPH10103728A | 1998-04-21 | |||
| JP2001142148A | 2001-05-25 | |||
| JP2008036065A | 2008-02-21 |
Other References:
JR LAKOWICZ: "Radiative Decay Engineering: 2. Effects of Silver Island Films on Fluorescence Intensity, Lifetimes, and Resonance Energy Transfer", ANALYTICAL BIOCHEMISTRY, vol. 301, 2002, pages 261 - 277, XP002267404, DOI: 10.1006/abio.2001.5503
J. ACOUST. SOC. JPN., vol. 11, no. 1, 1990, pages 19 - 24
See also references of EP 3961046A4
J. ACOUST. SOC. JPN., vol. 11, no. 1, 1990, pages 19 - 24
See also references of EP 3961046A4
Attorney, Agent or Firm:
NAKASHIMA Junko et al. (JP)
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