US3249178A - High acoustic transmission loss panel - Google Patents

High acoustic transmission loss panel Download PDF

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Publication number
US3249178A
US3249178A US22592262A US3249178A US 3249178 A US3249178 A US 3249178A US 22592262 A US22592262 A US 22592262A US 3249178 A US3249178 A US 3249178A
Authority
US
United States
Prior art keywords
layers
panel
acoustic
stiff
transmission loss
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 - Lifetime
Application number
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English (en)
Inventor
Bill G Watters
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.)
Bolt Beranek and Newman Inc
Original Assignee
Bolt Beranek and Newman 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
Priority to NL255745D priority Critical patent/NL255745A/xx
Priority claimed from US851099A external-priority patent/US3087574A/en
Priority to GB3757563A priority patent/GB954908A/en
Priority to GB1146560A priority patent/GB954907A/en
Priority to DE19601409914 priority patent/DE1409914A1/de
Application filed by Bolt Beranek and Newman Inc filed Critical Bolt Beranek and Newman Inc
Priority to US22592262 priority patent/US3249178A/en
Application granted granted Critical
Publication of US3249178A publication Critical patent/US3249178A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10366—Reinforcements of the laminated safety glass or glazing against impact or intrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B32B17/10045—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets with at least one intermediate layer consisting of a glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • 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
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • 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
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • 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
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • 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
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • E04B2001/8466—Solid slabs or blocks layered with an intermediate layer formed of lines or dots of elastic material
    • 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
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31645—Next to addition polymer from unsaturated monomers
    • Y10T428/31649—Ester, halide or nitrile of addition polymer

Definitions

  • the present invention relates to walls, partitions, and other' surfaces, hereinafter generically referred to as panels, for providing a high acoustic transmission loss over a wide band of acoustic frequencies, the present application being a division of copending application Serial No. 851,099, filed November 5, 1959, for High Acoustic Transmission Loss Panel and the Like, now Patent #3,087,574, dated April 30, 1963.
  • sandwich-type panels may be constructed that provide a high acoustic transmission loss.
  • An object of the present invention is to provide a novel type of sandwich panel operating in accordance with the acoustic principles above mentioned and that comprises a plurality in excess of two layers of stiff sheet material, with each layer separated from but connected to the adjacent layer by an intermediate layer of elastic material that is preferably shearable, but substantially incompressible.
  • a further object is to provide a novel light-transmitting panel of more general utility, also.
  • the velocity of the effective shear wave propagating in the interior medium of the panel between the outer surfaces or facings must not exceed approxi mately 0.7 of the velocity C of sound in the air or other medium surrounding the panel; preferably not greater than two-thirds such velocity.
  • This requires a sufficiently low ratio of shear modulus-to-density of the interior medium of the panel and the like, where density is defined as the density of the interior medium, as loaded with the panel structure.
  • the effective longitudinal stiffness of the interior medium defined as the longitudinal stiffness of the shearable or effectively shearable part of the interior medium, must be less than the longitudinal stifiness (Youngs modulus times thickness) of the inner and outer facing surfaces in order to set up the shear-wave boundary condition essential to the attainment of the above-described phenomenon.
  • the thickness of the panel and the parameters of the interior medium between the outer surfaces must be such as to provide a transverse mechanical resonant frequency outside the band of acoustic frequencies that are to be prevented from transmission through the panel and the like.
  • a panel satisfying the abovementioned criteria is illustrated as constructed of relatively inexpensive materials and is of simple structural design.
  • the panel comprises a plurality of layers 3, 5, 3, of stiff sheet material, with the layers 3 and 3' forming the outer surfaces of the panel.
  • Each of the layers is separated from but connected to the adjacent layer by an intermediate layer 4 of elastic material, forming a sandwich construction.
  • the layers 3, 5, 3' may be of stiff metal, glass, mica or the like and the elastic layers 4may be of rubber, synthetic elastomers, appropriately plasticized plastic materials, suchas polyvinyl chloride and similar soft but substantially imcompressible viscoelastic materials, connected or adhered to the stiff layers with bonding adhesive.
  • the panel may be inherently light-transmitting, which is desirable for some applications.
  • suitable dimensions for attaining this end are given in an illustration of 18 gauge steel plates (i.e., of thickness of the order of tenths of an inch) and shearable layers of substantially incompressible gum rubber of about 35 Durometer, secured with an epoxy adhesive.
  • the thickness of the shearable layers 4 is less than that of the relatively stiff layers, say, about 0.018 (i.e., of the order of hundredths of an inch).
  • High acoustic transmission loss is thus obtained, as distinguished from other sandwich panels not having such structural relationships of the elastic properties of its components.
  • Substantially constant transverse-wave velocities have been achieved as discussed in the said co-pending application, well below the velocity of sound in air over a broad band of acoustic frequencies and void of transverse or doublewall resonance effects within such band; substantially constant velocities of the order of 450 ft. per sec. being described in the said co-pending application over the band from about 200 cycles per sec. up to about 1700 cycles per sec. Acoustic insertion loss of from about 25 to over 40 decibels over a frequency band of from a few hundred cycles per sec. up to over six thousand cycles per sec. has been experimentally obtained.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)
US22592262 1959-11-05 1962-09-24 High acoustic transmission loss panel Expired - Lifetime US3249178A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL255745D NL255745A (fr) 1959-11-05
GB3757563A GB954908A (en) 1959-11-05 1960-03-31 Panel structure with high acoustic transmission loss
GB1146560A GB954907A (en) 1959-11-05 1960-03-31 Panel structure providing a high acoustic transmission loss
DE19601409914 DE1409914A1 (de) 1959-11-05 1960-04-06 Platte u.dgl. mit hoher Schalldaemmung
US22592262 US3249178A (en) 1959-11-05 1962-09-24 High acoustic transmission loss panel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US851099A US3087574A (en) 1959-11-05 1959-11-05 High acoustic transmission loss panel and the like
US22592262 US3249178A (en) 1959-11-05 1962-09-24 High acoustic transmission loss panel

Publications (1)

Publication Number Publication Date
US3249178A true US3249178A (en) 1966-05-03

Family

ID=26920046

Family Applications (1)

Application Number Title Priority Date Filing Date
US22592262 Expired - Lifetime US3249178A (en) 1959-11-05 1962-09-24 High acoustic transmission loss panel

Country Status (4)

Country Link
US (1) US3249178A (fr)
DE (1) DE1409914A1 (fr)
GB (2) GB954907A (fr)
NL (1) NL255745A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823794A (en) * 1971-11-25 1974-07-16 Saint Gobain Acoustical panels
US3828504A (en) * 1971-05-25 1974-08-13 K Spang Concrete structural member with high internal damping
US4011356A (en) * 1974-01-29 1977-03-08 Glaverbel-Mecaniver S.A. Laminated glazing pane
US4384634A (en) * 1979-12-18 1983-05-24 United Technologies Corporation Sound absorbing structure
EP0204188A1 (fr) * 1985-05-21 1986-12-10 Flachglas Aktiengesellschaft Panneau de construction transparent et absorbant
US4924969A (en) * 1988-11-09 1990-05-15 Heureux Ghislain L Acoustic door
US5418340A (en) * 1993-11-22 1995-05-23 Wambolt; Bryan K. Method and apparatus for acoustical partition
US6123171A (en) * 1999-02-24 2000-09-26 Mcnett; Christopher P. Acoustic panels having plural damping layers
US11254087B2 (en) * 2017-04-26 2022-02-22 Corning Incorporated Micro-perforated glass laminates and methods of making the same

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL129749C (fr) * 1964-03-31
US3263770A (en) * 1964-10-19 1966-08-02 Atlas Copco Ab Noise deadening means for percussive tools
DE2408028B2 (de) * 1974-02-20 1978-05-11 Fa. Carl Freudenberg, 6940 Weinheim Schallschluckplatte
JPH0739160B2 (ja) * 1991-04-24 1995-05-01 ニチアス株式会社 制振材
FR2690379B1 (fr) * 1992-04-22 1995-05-24 Lorraine Laminage Tôle sandwich.
EP0728877A1 (fr) * 1995-02-23 1996-08-28 Screg Elément d'isolation acoustique, et paroi anti-bruit réalisée à partir de tels éléments
GB2355957B (en) * 1999-11-05 2003-07-02 Intelligent Engineering Composite structural laminate plate construction
US6706406B1 (en) 1996-11-13 2004-03-16 Fern Investments Limited Composite steel structural plastic sandwich plate systems
US7261932B2 (en) 1996-11-13 2007-08-28 Intelligent Engineering (Bahamas) Limited Composite structural laminate plate construction

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE499277A (fr) * 1949-11-24
US1961745A (en) * 1931-01-16 1934-06-05 Mechanical Rubber Co Laminated material
US1973124A (en) * 1931-11-14 1934-09-11 Bakelite Corp Airplane structure
US2008655A (en) * 1933-02-11 1935-07-16 Johns Manville Vibration damping structure and method of making
US2068782A (en) * 1934-06-28 1937-01-26 Libbey Owens Ford Glass Co Plastic for laminated safety glass
US2142279A (en) * 1933-02-08 1939-01-03 Ig Farbenindustrie Ag Adhesive
US2819032A (en) * 1953-10-20 1958-01-07 Douglas Aircraft Co Inc Aircraft fuselage having panel damping material
US3007997A (en) * 1958-07-01 1961-11-07 Gen Electric Printed circuit board
US3025198A (en) * 1959-06-10 1962-03-13 Harold S Dunn Light transmitting insulated roof panel
US3078969A (en) * 1959-06-15 1963-02-26 Lord Mfg Co Damped beam
US3079277A (en) * 1959-11-16 1963-02-26 Lord Mfg Co Damped structure
US3087569A (en) * 1959-03-23 1963-04-30 Bolt Beranek & Newman Vibration-damping structure
US3110369A (en) * 1959-05-22 1963-11-12 Wright Barry Corp Self-damped laminar structure

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1961745A (en) * 1931-01-16 1934-06-05 Mechanical Rubber Co Laminated material
US1973124A (en) * 1931-11-14 1934-09-11 Bakelite Corp Airplane structure
US2142279A (en) * 1933-02-08 1939-01-03 Ig Farbenindustrie Ag Adhesive
US2008655A (en) * 1933-02-11 1935-07-16 Johns Manville Vibration damping structure and method of making
US2068782A (en) * 1934-06-28 1937-01-26 Libbey Owens Ford Glass Co Plastic for laminated safety glass
BE499277A (fr) * 1949-11-24
US2819032A (en) * 1953-10-20 1958-01-07 Douglas Aircraft Co Inc Aircraft fuselage having panel damping material
US3007997A (en) * 1958-07-01 1961-11-07 Gen Electric Printed circuit board
US3087569A (en) * 1959-03-23 1963-04-30 Bolt Beranek & Newman Vibration-damping structure
US3110369A (en) * 1959-05-22 1963-11-12 Wright Barry Corp Self-damped laminar structure
US3025198A (en) * 1959-06-10 1962-03-13 Harold S Dunn Light transmitting insulated roof panel
US3078969A (en) * 1959-06-15 1963-02-26 Lord Mfg Co Damped beam
US3079277A (en) * 1959-11-16 1963-02-26 Lord Mfg Co Damped structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828504A (en) * 1971-05-25 1974-08-13 K Spang Concrete structural member with high internal damping
US3823794A (en) * 1971-11-25 1974-07-16 Saint Gobain Acoustical panels
US4011356A (en) * 1974-01-29 1977-03-08 Glaverbel-Mecaniver S.A. Laminated glazing pane
US4384634A (en) * 1979-12-18 1983-05-24 United Technologies Corporation Sound absorbing structure
EP0204188A1 (fr) * 1985-05-21 1986-12-10 Flachglas Aktiengesellschaft Panneau de construction transparent et absorbant
US4924969A (en) * 1988-11-09 1990-05-15 Heureux Ghislain L Acoustic door
US5418340A (en) * 1993-11-22 1995-05-23 Wambolt; Bryan K. Method and apparatus for acoustical partition
US6123171A (en) * 1999-02-24 2000-09-26 Mcnett; Christopher P. Acoustic panels having plural damping layers
US11254087B2 (en) * 2017-04-26 2022-02-22 Corning Incorporated Micro-perforated glass laminates and methods of making the same

Also Published As

Publication number Publication date
NL255745A (fr) 1900-01-01
GB954907A (en) 1964-04-08
DE1409914A1 (de) 1969-05-29
GB954908A (en) 1964-04-08

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