GB932521A - Improvements relating to noise reducing enclosures - Google Patents

Improvements relating to noise reducing enclosures

Info

Publication number
GB932521A
GB932521A GB1974661A GB1974661A GB932521A GB 932521 A GB932521 A GB 932521A GB 1974661 A GB1974661 A GB 1974661A GB 1974661 A GB1974661 A GB 1974661A GB 932521 A GB932521 A GB 932521A
Authority
GB
United Kingdom
Prior art keywords
enclosure
transformer
resonator
membrane
holes
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.)
Expired
Application number
GB1974661A
Inventor
John Dunsbee
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB1974661A priority Critical patent/GB932521A/en
Publication of GB932521A publication Critical patent/GB932521A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

932,521. Modifying acoustic properties of rooms. FERRANTI Ltd. May 21, 1962 [June 1, 1961], No. 19746/61. Class 13. [Also in Group XXXV] A noise-reducing enclosure such as a transformer tank has at least one resonant absorber (e.g. Helmholtz resonator) which is tuned to the objectionable frequencies of the noise source and which has the side in which the hole or holes are formed facing a side of the enclosure and separated from it by a narrow passage. The transformer 1 (Fig. 2), has brick enclosure 2 and four Helmholtz resonators 3 the space 4 being freely connected to the remainder of the space in the enclosure. The holes may be rough or the resonator cavity may contain absorbent material. In the case of a panel absorber it is the side formed by an elastic panel or membrane which faces the side of the enclosure and this membrane may be loaded with a non- elastic mass. A resonator may be arranged close to the top surface of the transformer enclosure.
GB1974661A 1961-06-01 1961-06-01 Improvements relating to noise reducing enclosures Expired GB932521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1974661A GB932521A (en) 1961-06-01 1961-06-01 Improvements relating to noise reducing enclosures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1974661A GB932521A (en) 1961-06-01 1961-06-01 Improvements relating to noise reducing enclosures

Publications (1)

Publication Number Publication Date
GB932521A true GB932521A (en) 1963-07-31

Family

ID=10134515

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1974661A Expired GB932521A (en) 1961-06-01 1961-06-01 Improvements relating to noise reducing enclosures

Country Status (1)

Country Link
GB (1) GB932521A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086184A2 (en) * 1982-02-03 1983-08-17 Krister Amnéus Sound damping device
US9607600B2 (en) 2009-02-06 2017-03-28 Sonobex Limited Attenuators, arrangements of attenuators, acoustic barriers and methods for constructing acoustic barriers
CN108240647A (en) * 2017-10-31 2018-07-03 宁波方太厨具有限公司 A kind of frequency conversion noise reduction outlet housing of range hood

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086184A2 (en) * 1982-02-03 1983-08-17 Krister Amnéus Sound damping device
EP0086184A3 (en) * 1982-02-03 1984-05-02 Krister Amnéus Sound damping device
US9607600B2 (en) 2009-02-06 2017-03-28 Sonobex Limited Attenuators, arrangements of attenuators, acoustic barriers and methods for constructing acoustic barriers
CN108240647A (en) * 2017-10-31 2018-07-03 宁波方太厨具有限公司 A kind of frequency conversion noise reduction outlet housing of range hood
CN108240647B (en) * 2017-10-31 2023-11-17 宁波方太厨具有限公司 Variable-frequency noise-reduction air outlet cover of range hood

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