GB931080A - Vibrational radiating or receiving apparatus - Google Patents

Vibrational radiating or receiving apparatus

Info

Publication number
GB931080A
GB931080A GB70460A GB70460A GB931080A GB 931080 A GB931080 A GB 931080A GB 70460 A GB70460 A GB 70460A GB 70460 A GB70460 A GB 70460A GB 931080 A GB931080 A GB 931080A
Authority
GB
United Kingdom
Prior art keywords
panel
skins
support
diaphragm
per unit
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
GB70460A
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
Application filed by Bolt Beranek and Newman Inc filed Critical Bolt Beranek and Newman Inc
Publication of GB931080A publication Critical patent/GB931080A/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
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/20—Reflecting arrangements
    • 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
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/01—Acoustic transducers using travelling bending waves to generate or detect sound

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)

Abstract

931,080. Diaphragms. BOLT, BERANEK & NEWMAN Inc. Jan. 8, 1960 [March 24, 1959], No. 704/60. Class 40 (4). A panel in a fluid medium has an electromechanical transducer 3, Fig. 5, coupled therewith, and comprises a pair of skins 1, 1<SP>1</SP> (see also Fig. 2) just completely sandwiching therebetween a structure 5 which has a longitudinal stiffness per unit width smaller than that of each of the skins 1, 1<SP>1</SP>. The panel also satisfies the relationship ##S/M- > C, > C, where S is the sheer stiffness of the structure 5, M is the mass per unit area of surface of the panel and C is the velocity of sound in the fluid medium. The panel is for radiating or receiving sound waves which travel as bending waves in the panel. The panel may employ a paper-honeycomb structure 5 sandwiched between aluminium foil skins 1, 1<SP>1</SP>. Forward and rearward radiation or reception is provided by suspending the panel within an opening 2 in a support 4, Fig. 5. Several such panels may be arranged side by side on a common flat support, Fig. 6, not shown, or on the surface of a conical support 4<SP>1</SP>, Fig. 7. A circular panel has a transducer 3 at its centre, Fig. 9. A diaphragm for stereophonic reproduction, Fig. 8, is arranged between two reflecting walls and has two stereophonically related transducers 3 one at each end of the diaphragm. Transducers 3 may be of the magnetomotive, magnetostrictive or piezoelectric type.
GB70460A 1959-03-24 1960-01-08 Vibrational radiating or receiving apparatus Expired GB931080A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80165359A 1959-03-24 1959-03-24

Publications (1)

Publication Number Publication Date
GB931080A true GB931080A (en) 1963-07-10

Family

ID=25181701

Family Applications (1)

Application Number Title Priority Date Filing Date
GB70460A Expired GB931080A (en) 1959-03-24 1960-01-08 Vibrational radiating or receiving apparatus

Country Status (4)

Country Link
BE (1) BE587329A (en)
CH (1) CH370124A (en)
FR (1) FR1246695A (en)
GB (1) GB931080A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247925A (en) * 1962-03-08 1966-04-26 Lord Corp Loudspeaker
US3553392A (en) * 1968-03-07 1971-01-05 Electronics Inc Of Pennsylvani Electrodynamic sound radiator
GB2351200A (en) * 1999-06-15 2000-12-20 Nec Corp Off-centre or multipoint driven panel loudspeaker
US6215882B1 (en) 1996-12-11 2001-04-10 The Secretary Of State For Defence Panel-form loudspeaker
US6247551B1 (en) 1990-08-04 2001-06-19 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Panel-form loudspeaker
WO2008042630A3 (en) * 2006-09-29 2008-05-29 Shure Acquisition Holdings Inc Point excitation placement in an audio transducer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247925A (en) * 1962-03-08 1966-04-26 Lord Corp Loudspeaker
US3553392A (en) * 1968-03-07 1971-01-05 Electronics Inc Of Pennsylvani Electrodynamic sound radiator
US6247551B1 (en) 1990-08-04 2001-06-19 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Panel-form loudspeaker
US6215882B1 (en) 1996-12-11 2001-04-10 The Secretary Of State For Defence Panel-form loudspeaker
GB2351200A (en) * 1999-06-15 2000-12-20 Nec Corp Off-centre or multipoint driven panel loudspeaker
US6554098B1 (en) 1999-06-15 2003-04-29 Nec Corporation Panel speaker with wide free space
WO2008042630A3 (en) * 2006-09-29 2008-05-29 Shure Acquisition Holdings Inc Point excitation placement in an audio transducer
JP2010505366A (en) * 2006-09-29 2010-02-18 シュアー アクイジッション ホールディングス インコーポレイテッド Point excitation arrangement in audio transducers
US7983432B2 (en) 2006-09-29 2011-07-19 Shure Acquisition Holdings, Inc. Point excitation placement in an audio transducer
CN101523929B (en) * 2006-09-29 2013-07-31 舒尔·阿奎西什控股公司 Point excitation placement in an audio transducer

Also Published As

Publication number Publication date
FR1246695A (en) 1960-11-18
CH370124A (en) 1963-06-30
BE587329A (en) 1960-05-30

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