GB590541A - Improvements in sound-absorbent structures - Google Patents

Improvements in sound-absorbent structures

Info

Publication number
GB590541A
GB590541A GB1562445A GB1562445A GB590541A GB 590541 A GB590541 A GB 590541A GB 1562445 A GB1562445 A GB 1562445A GB 1562445 A GB1562445 A GB 1562445A GB 590541 A GB590541 A GB 590541A
Authority
GB
United Kingdom
Prior art keywords
enclosure
air
sheet
predetermined frequency
wall
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
GB1562445A
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.)
CHARLES RICHARDSON MAGUIRE
Metropolitan Vickers Electrical Co Ltd
Original Assignee
CHARLES RICHARDSON MAGUIRE
Metropolitan Vickers Electrical Co Ltd
Filing date
Publication date
Application filed by CHARLES RICHARDSON MAGUIRE, Metropolitan Vickers Electrical Co Ltd filed Critical CHARLES RICHARDSON MAGUIRE
Publication of GB590541A publication Critical patent/GB590541A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/99—Room acoustics, i.e. forms of, or arrangements in, rooms for influencing or directing sound
    • E04B1/994—Acoustical surfaces with adjustment mechanisms

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

590,541. Sound insulation. KING, A. J., SCOTT, R. A., MAGUIRE, C. R., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. April 4, 1944, No. 15624/45. Divided out of 6286/44. [Class 64 (ii)] [Also in Group XXXVIII] A device for absorbing sound waves of a predetermined frequency and applied to a backing member, such as the wall of a ventilating shaft, comprises an air-tight enclosure C formed by a vibratory sheet B spaced from the wall A by spacers D and the air pressure in the enclosure is reduced to a value such that at the predetermined frequency the stiffness reactance of the enclosed air at the inner surface of the sheet B is approximately equal to the mass reactance of the sheet. The enclosure may contain a layer of porous material and the acoustic resistance of the enclosure as a whole is arranged to be of the same order of magnitude as the characteristic acoustic impedance of air or other medium to which the device is exposed. Intermediate spacers D may have apertures F to facilitate the withdrawal of air from the enclosure. Specification 590,540, [Group XXVII], is referred to.
GB1562445A 1944-04-04 Improvements in sound-absorbent structures Expired GB590541A (en)

Publications (1)

Publication Number Publication Date
GB590541A true GB590541A (en) 1947-07-21

Family

ID=1731650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1562445A Expired GB590541A (en) 1944-04-04 Improvements in sound-absorbent structures

Country Status (1)

Country Link
GB (1) GB590541A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2365250B (en) * 2000-07-21 2004-06-16 B & W Loudspeakers Acoustic structures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2365250B (en) * 2000-07-21 2004-06-16 B & W Loudspeakers Acoustic structures
US6896096B2 (en) 2000-07-21 2005-05-24 B&W Loudspeakers Limited Acoustic structures

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