EP2209111A1 - Überdeckung durch Geräusch - Google Patents

Überdeckung durch Geräusch Download PDF

Info

Publication number
EP2209111A1
EP2209111A1 EP09150564A EP09150564A EP2209111A1 EP 2209111 A1 EP2209111 A1 EP 2209111A1 EP 09150564 A EP09150564 A EP 09150564A EP 09150564 A EP09150564 A EP 09150564A EP 2209111 A1 EP2209111 A1 EP 2209111A1
Authority
EP
European Patent Office
Prior art keywords
noise
fans
fan
speed
installation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09150564A
Other languages
English (en)
French (fr)
Inventor
Patricia Scanlon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia of America Corp
Original Assignee
Lucent Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucent Technologies Inc filed Critical Lucent Technologies Inc
Priority to EP09150564A priority Critical patent/EP2209111A1/de
Publication of EP2209111A1 publication Critical patent/EP2209111A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/665—Sound attenuation by means of resonance chambers or interference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/1752—Masking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/46—Jamming having variable characteristics characterized in that the jamming signal is produced by retransmitting a received signal, after delay or processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/247—Active noise-suppression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/10—Jamming or countermeasure used for a particular application
    • H04K2203/12—Jamming or countermeasure used for a particular application for acoustic communication

Definitions

  • two or more identical fans may be used, operated at different speeds such that the noise floor of one of the fans masks the noise generated by the other fan or the other fans.
  • Figure 6 shows the overall noise levels (in dBA) when one fan, of type fan 1 (see above) is running at 4,800 rpm and the second fan is set at varying speeds. Measurements are taken as the speed of the second fan increase from 0 rpm up to 4,800 rpm (the same as fan 1a). Note that for this plot sound pressure level (SPL) measurements were performed in a small enclosed environment and as a result the measurements are not calibrated. They are therefore provided only as a means to determine general and relative changes in SPL (not absolute changes).
  • SPL sound pressure level
  • the individual fans are controlled by a separate power line such they can be independently controlled to have different speeds/phases. This may be done from a single controller or each fan may have its own controller.
  • the fans may be operated so that their waveforms follow generally similar envelopes (ie peaks and troughs roughly spectrally aligned), as shown in the various examples given for example, with peaks and troughs generally lying in the same relative position in other to maximise the effect of the noise floor and the ability of the noise floor to hide the noise generated by other fans. They may however be operated in other ways in which one fan creates a noise floor below which the noise from other fans are hidden.
  • the noise envelope of the second (hidden) and/or further fans may be allowed to 'peak' above the envelope of the masking fan (as shown at a frequency of around 17 KHz in Figure 3 for example), provided the peak is less than that allowed by standards without penalties (eg those set by ISO996-2: 1987).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
EP09150564A 2009-01-14 2009-01-14 Überdeckung durch Geräusch Withdrawn EP2209111A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09150564A EP2209111A1 (de) 2009-01-14 2009-01-14 Überdeckung durch Geräusch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09150564A EP2209111A1 (de) 2009-01-14 2009-01-14 Überdeckung durch Geräusch

Publications (1)

Publication Number Publication Date
EP2209111A1 true EP2209111A1 (de) 2010-07-21

Family

ID=40692844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09150564A Withdrawn EP2209111A1 (de) 2009-01-14 2009-01-14 Überdeckung durch Geräusch

Country Status (1)

Country Link
EP (1) EP2209111A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015198418A1 (ja) * 2014-06-25 2015-12-30 三菱電機株式会社 空気清浄機
CN113450750A (zh) * 2020-03-26 2021-09-28 北京钛方科技有限责任公司 一种噪声控制方法及装置

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4089618A (en) * 1974-07-02 1978-05-16 Rotron Incorporated Fan with noise reduction
US5010576A (en) * 1990-01-22 1991-04-23 Westinghouse Electric Corp. Active acoustic attenuation system for reducing tonal noise in rotating equipment
US5203178A (en) * 1990-10-30 1993-04-20 Norm Pacific Automation Corp. Noise control of air conditioner
US5221185A (en) * 1991-08-05 1993-06-22 General Electric Company Method and apparatus for synchronizing rotating machinery to reduce noise
US6290140B1 (en) * 1999-03-04 2001-09-18 Energyiq Systems, Inc. Energy management system and method
EP1225318A2 (de) * 2001-01-13 2002-07-24 Robert Bosch Gmbh Verfahren zur Regelung der Drehzahl eines Lüfters für elektronische Bauteile oder Geräte in einem Kraftfahrzeug
EP1291845A2 (de) * 2001-09-10 2003-03-12 Armstrong World Industries, Inc. Schallmaskierungssystem
US20030219132A1 (en) * 2002-04-04 2003-11-27 Brigham Young University Multi-channel active control system and method for the reduction of tonal noise from an axial fan
US20060103334A1 (en) * 2004-11-16 2006-05-18 International Business Machines Corporation Mutual active cancellation of fan noise and vibration
WO2006056856A2 (en) * 2004-11-23 2006-06-01 Andreas Raptopoulos Electronic sound screening system and method of accoustically improving the environment
US20060269077A1 (en) * 2005-05-25 2006-11-30 Purdue Research Foundation Fan noise control apparatus
US20080095620A1 (en) * 2006-10-20 2008-04-24 Sun Microsystems, Inc. Sync method for reducing fan noise
WO2008117002A1 (en) * 2007-03-26 2008-10-02 Nds Limited Active fan control

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4089618A (en) * 1974-07-02 1978-05-16 Rotron Incorporated Fan with noise reduction
US5010576A (en) * 1990-01-22 1991-04-23 Westinghouse Electric Corp. Active acoustic attenuation system for reducing tonal noise in rotating equipment
US5203178A (en) * 1990-10-30 1993-04-20 Norm Pacific Automation Corp. Noise control of air conditioner
US5221185A (en) * 1991-08-05 1993-06-22 General Electric Company Method and apparatus for synchronizing rotating machinery to reduce noise
US6290140B1 (en) * 1999-03-04 2001-09-18 Energyiq Systems, Inc. Energy management system and method
EP1225318A2 (de) * 2001-01-13 2002-07-24 Robert Bosch Gmbh Verfahren zur Regelung der Drehzahl eines Lüfters für elektronische Bauteile oder Geräte in einem Kraftfahrzeug
EP1291845A2 (de) * 2001-09-10 2003-03-12 Armstrong World Industries, Inc. Schallmaskierungssystem
US20030219132A1 (en) * 2002-04-04 2003-11-27 Brigham Young University Multi-channel active control system and method for the reduction of tonal noise from an axial fan
US20060103334A1 (en) * 2004-11-16 2006-05-18 International Business Machines Corporation Mutual active cancellation of fan noise and vibration
WO2006056856A2 (en) * 2004-11-23 2006-06-01 Andreas Raptopoulos Electronic sound screening system and method of accoustically improving the environment
US20060269077A1 (en) * 2005-05-25 2006-11-30 Purdue Research Foundation Fan noise control apparatus
US20080095620A1 (en) * 2006-10-20 2008-04-24 Sun Microsystems, Inc. Sync method for reducing fan noise
WO2008117002A1 (en) * 2007-03-26 2008-10-02 Nds Limited Active fan control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BEZUCHA P: "Psycho-acoustic masking phenomena - Use in digital storage and transmission of sound", RADIOENGINEERING, vol. 3, no. 2, 1 July 1994 (1994-07-01), pages 22 - 23, XP007908979 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015198418A1 (ja) * 2014-06-25 2015-12-30 三菱電機株式会社 空気清浄機
JPWO2015198418A1 (ja) * 2014-06-25 2017-04-20 三菱電機株式会社 空気清浄機
CN113450750A (zh) * 2020-03-26 2021-09-28 北京钛方科技有限责任公司 一种噪声控制方法及装置
CN113450750B (zh) * 2020-03-26 2023-04-28 北京钛方科技有限责任公司 一种噪声控制方法及装置

Similar Documents

Publication Publication Date Title
US7869607B2 (en) Quiet active fan for servers chassis
US7282873B2 (en) Mutual active cancellation of fan noise and vibration
EP3732363B1 (de) Steuerung des lärms einer windenergieanlage
JP2010256902A (ja) ノイズ発生源からの音の中の純音の遮蔽
US10475433B2 (en) Electrical power generator with active noise cancellation in ventilation ducts
EP2209111A1 (de) Überdeckung durch Geräusch
Killeen et al. Fan-noise reduction of data centre telecommunications’ server racks, with an acoustic metamaterial broadband, low-frequency sound-absorbing liner
KR100759705B1 (ko) 능동소음제어를 이용한 기계류 소음감쇠 시스템
US20080095620A1 (en) Sync method for reducing fan noise
Miljković Noise within a data center
Chang et al. Active noise control for centrifugal and axial fans
WO2007099541A2 (en) Quiet active fan for servers chassis
Stauber et al. Wind turbine noise attenuation using modal structural damping
Wang et al. Noise and vibration characteristic studies of twin screw compressor in different operating conditions
Bujoreanu et al. Experimental investigation of noise characteristics for HVAC silencers
Germain et al. Experimental study of propeller-aircraft run-up noise
Karaisas et al. Vibroacoustic diagnosis technique for electric motors in residential environment
US20180314618A1 (en) Replicating contours of soundscapes within computing enclosures
Ebert et al. Mastering Wind Turbine Tonalities with Active Vibration Control
Hofmann et al. Noise characterization of automotive auxiliary fan drives
Lagö et al. Analysis of helicopter sound for the development of a new generation active headset
Slapak et al. A generic-silenced axial fan based on a dual ANC system
Dutta Troubleshooting Noise Sources from a Powerplant
Yunos et al. Octave Band Technique for Noise Measurement at the Source, Path, and Receiver of Gas Turbines in Oil and Gas Facilities.
Arafa et al. Noise Characterization and Reduction Techniques of Multiple Axial Fans Unit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA RS

17P Request for examination filed

Effective date: 20110121

17Q First examination report despatched

Effective date: 20110207

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALCATEL-LUCENT USA INC.

111Z Information provided on other rights and legal means of execution

Free format text: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

Effective date: 20130410

D11X Information provided on other rights and legal means of execution (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160105