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GB1228775A - - Google Patents

Info

Publication number
GB1228775A
GB1228775A GB2615167A GB1228775DA GB1228775A GB 1228775 A GB1228775 A GB 1228775A GB 2615167 A GB2615167 A GB 2615167A GB 1228775D A GB1228775D A GB 1228775DA GB 1228775 A GB1228775 A GB 1228775A
Authority
GB
United Kingdom
Prior art keywords
sections
loud
network
diaphragm
speaker
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
GB2615167A
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 filed Critical
Publication of GB1228775A publication Critical patent/GB1228775A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/02—Loudspeakers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

1,228,775. Loud-speakers. ACOUSTICAL MFG. CO. Ltd, 6 June, 1968 [6 June, 1967], No. 26151/67. Heading H4J. An electrostatic loud-speaker has a plurality of coplanar, separately electrical drivable sections. All the sections either share a single membrane or have coplanar membranes. All are substantially acoustically transparent over a given range of frequencies. In use a uniform polarizing charge is established on the membrane or membranes of all the sections. An electrical network has input terminals and includes the loud-speaker sections as parallel components. Constant current drive of the network is effected. As described, a circular diaphragm 1 is supported between concentric, perforated, rigid plate electrodes 2, 3 whereby separately energizable loud-speaker sections are formed. The various sections are connected by impedances 4 to form an electrical network. The series branches of the network may delay and/or attenuate the signal voltages applied to the individual parallel components so that the total radiating area and/or its effective phase contour varies with frequency. In use the diaphragm 1 is connected to a polarizing voltage source 5. Charge uniformity is effected by distributing a high resistance (shown as 6) in the diaphragm itself. Acoustic transparency is obtained by appropriate selection of diaphragm tension and mass. The vector sum of the currents in the individual sections (i.e. the total current at the input terminals of the network) is controlled by a resistor 7 which samples the current flowing to the electrodes 2 of all the sections and develops a feedback voltage. This is applied via line 8 as feedback to the amplifier (not shown). The total current is thereby made proportional to the input signal. Complete and automatic control of axial response may be obtained over a wide frequency range.
GB2615167A 1967-06-06 1967-06-06 Expired GB1228775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2615167 1967-06-06

Publications (1)

Publication Number Publication Date
GB1228775A true GB1228775A (en) 1971-04-21

Family

ID=10239180

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2615167A Expired GB1228775A (en) 1967-06-06 1967-06-06

Country Status (4)

Country Link
US (1) US3773984A (en)
DE (1) DE1762375C3 (en)
FR (1) FR1601302A (en)
GB (1) GB1228775A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173068A (en) * 1985-02-08 1986-10-01 Furuno Electric Co Beam forming device
US4799265A (en) * 1986-07-08 1989-01-17 U.S. Philips Corporation Electrostatic transducer unit
WO2009127787A1 (en) * 2008-04-18 2009-10-22 Panphonics Oy Directing sound field of actuator
GB2520352A (en) * 2013-11-19 2015-05-20 Mellow Acoustics Ltd Loudspeakers and loudspeaker drive circuits
WO2021243367A1 (en) * 2020-05-29 2021-12-02 Shure Acquisition Holdings, Inc. Segmented stator plates for electrostatic transducers

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892927A (en) * 1973-09-04 1975-07-01 Theodore Lindenberg Full range electrostatic loudspeaker for audio frequencies
AT361555B (en) * 1979-02-12 1981-03-25 Akg Akustische Kino Geraete HEADPHONE
BG34753A1 (en) 1982-01-22 1983-11-15 Knchev Electrostatic acoustic converter
US4703509A (en) * 1985-06-19 1987-10-27 Zavod Za Elektronni Preobrazuvatelni Elementi Electrostatic acoustic converter with stationary electrode having a progressively increasing surface resistance
DE102004048990A1 (en) * 2004-10-04 2006-04-06 Volkswagen Ag Speaker arrangement in a motor vehicle
WO2008115284A2 (en) 2006-10-16 2008-09-25 Thx Ltd. Loudspeaker line array configurations and related sound processing
EP2436194B1 (en) 2009-05-29 2013-07-03 e-Scape AS Loudspeaker arrangement
NO331450B1 (en) * 2009-06-17 2012-01-02 E Scape As speaker device
US8831248B2 (en) * 2010-08-04 2014-09-09 Nokia Corporation Apparatus with directivity pattern

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE373730A (en) * 1929-09-27
GB537931A (en) * 1940-02-21 1941-07-14 Donovan Ernest Lea Shorter Improvements in electrostatic loudspeakers
US2302493A (en) * 1941-01-28 1942-11-17 Gen Electric Amplifying system
US2387845A (en) * 1943-06-24 1945-10-30 Bell Telephone Labor Inc Electroacoustic transducer
US2634335A (en) * 1948-12-18 1953-04-07 Ampex Electric Corp Magnetic recording system with negative feedback system
US2843671A (en) * 1954-05-19 1958-07-15 David Bogen & Company Inc Feed back amplifiers
US2905761A (en) * 1956-08-29 1959-09-22 Siegler Corp Control of amplifier source resistance
US3061675A (en) * 1958-09-09 1962-10-30 Texas Instruments Inc Loud speaker improvement
US3135838A (en) * 1958-12-10 1964-06-02 Wright St George Lab Inc Electrostatic loudspeaker
US3542952A (en) * 1967-05-18 1970-11-24 Chien San Wang Low distortion signal reproduction apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173068A (en) * 1985-02-08 1986-10-01 Furuno Electric Co Beam forming device
GB2173068B (en) * 1985-02-08 1989-06-07 Furuno Electric Co Beam forming device
US4799265A (en) * 1986-07-08 1989-01-17 U.S. Philips Corporation Electrostatic transducer unit
WO2009127787A1 (en) * 2008-04-18 2009-10-22 Panphonics Oy Directing sound field of actuator
US8565454B2 (en) 2008-04-18 2013-10-22 Panphonics Oy Directing sound field of actuator
GB2520352A (en) * 2013-11-19 2015-05-20 Mellow Acoustics Ltd Loudspeakers and loudspeaker drive circuits
WO2021243367A1 (en) * 2020-05-29 2021-12-02 Shure Acquisition Holdings, Inc. Segmented stator plates for electrostatic transducers
US11582559B2 (en) 2020-05-29 2023-02-14 Shure Acquisition Holdings, Inc. Segmented stator plates for electrostatic transducers

Also Published As

Publication number Publication date
US3773984A (en) 1973-11-20
DE1762375B2 (en) 1973-03-15
DE1762375A1 (en) 1970-04-30
DE1762375C3 (en) 1973-10-04
FR1601302A (en) 1970-08-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee