US1674683A - Arrangement for uniform electrical sound transmission - Google Patents

Arrangement for uniform electrical sound transmission Download PDF

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Publication number
US1674683A
US1674683A US97008A US9700826A US1674683A US 1674683 A US1674683 A US 1674683A US 97008 A US97008 A US 97008A US 9700826 A US9700826 A US 9700826A US 1674683 A US1674683 A US 1674683A
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United States
Prior art keywords
arrangement
frequencies
sound
sound transmission
uniform electrical
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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
US97008A
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English (en)
Inventor
Hahnemann Walter
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
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Publication date
Application filed by Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
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Publication of US1674683A publication Critical patent/US1674683A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H04R3/14—Cross-over networks

Definitions

  • the invention deals with the problem of providing a sound apparatus which carries out the transformation of mechanical sound energy from and into electric energy as faithfully as possible within an extraordinary large range of frequencies, that is to say, it is to be so constructed that the differ ent sound oscillations which are present in a large complex (for example, in the transformation of music) are transformed and reproduced perfectly, both as regards the absolute magnitude of the sound oscillations on the one hand and above all with regard to their relative loudness of tone on the other hand.
  • the electrostatic apparatus is partlcularly suitable for use with high frequencies, compared with the electromagnetic I and the electrodynamic devices which work wlth iron, because with increasing frequency the dielectric losses increase considerably more gradually than the iron losses.
  • the electrodynamic apparatus on the other hand compared with the electromagnetic is more suitable for lower frequencies than the latter apparatus is, because the efficiency-constant of the electromagnetic apparatus .increases or diminishes with the square of the frequency whilst the efficiency-constant of the electrodynamic apparatus only varies with the first power of the frequency.
  • a further feature of the invention consists in the dilferent degree of efficiency of the different individual electrical vibrators being balanced by the inverse degree of amplification in connection with the' different types. This feature may be applied in connection with apparatus of different type or with apparatus of the same type.
  • the efiiciency-constant represents, as is well-known from the work of Hahnemann and Hecht (see particularly Physikalische Zeitschrift 20, 1919, Schallgeber und Schallempfanger, I), a measure for the efiiciency of the apparatus and the formulae for this constant are the following:
  • the degree of ampli cation of the amplifying devices connected therewith increase in the direction of higher frequencies.
  • the reference'numeral 1 indicates a sound horn which is coupled with the resonator 2.
  • An oscillatory diaphragm '3 abuts on the resonator 2.
  • This diaphragm carries in the case of the condenser apparatus the one plate 4 of the pair of condenser plates, in the case of the electroma netic apparatus the armature 5 and in t e case of the electrodynamic apparatus the oscillating current conductor 6.
  • the second condenser plate in the condenser apparatus is indicated by 7, the magnetic structure of the electromagnetic apparatus by 8 and the magnetic structure of the electrodynamic apparatus by 9.
  • a chain of series condensers and shunt inductances which substantially filters out the low frequencies is connected in front of the apparatus associated therewith.
  • a chain 11 composed of series choke coils and shunt condensers, which 'substantially shuts out the higher frequencies, is connected in front of the apparatus associated therewith.
  • a mixed chain 12 composed of both series andshunt condensers and choke coils, is provided.
  • V V V are amplifier units, the degree of amplification of each unit being assumed to be the same.
  • a device for sound communication comprising a plurality of individual electrical vibrators; a vibrator of the electrostatic type I for the high frequency range, a vibrator of the electromagnetic type for the medium frequency range, and a vibrator of the elec trodynamic type for the low frequency range 2.
  • A comprising electrical vibrators of different type for different ranges of frequencies; a
  • a device for sound communication comprising a plurality of electrical vibrators for the different ranges of frequencies, and amplifiers of different degree of amplification connected to the individual vibrators in the inverse ratio of the efliciency of production of sound of the individual vibrators.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Near-Field Transmission Systems (AREA)
US97008A 1925-03-31 1926-03-24 Arrangement for uniform electrical sound transmission Expired - Lifetime US1674683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE250221T 1925-03-31

Publications (1)

Publication Number Publication Date
US1674683A true US1674683A (en) 1928-06-26

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ID=31893645

Family Applications (1)

Application Number Title Priority Date Filing Date
US97008A Expired - Lifetime US1674683A (en) 1925-03-31 1926-03-24 Arrangement for uniform electrical sound transmission

Country Status (3)

Country Link
US (1) US1674683A (enrdf_load_stackoverflow)
FR (1) FR613417A (enrdf_load_stackoverflow)
GB (1) GB250221A (enrdf_load_stackoverflow)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452499A (en) * 1945-08-03 1948-10-26 Hartford Nat Bank & Trust Co Amplifying circuit arrangement
US2474191A (en) * 1947-06-06 1949-06-21 Avco Mfg Corp Tone control
US2539327A (en) * 1947-07-23 1951-01-23 Avco Mfg Corp Cabinet for radio apparatus
US2547464A (en) * 1950-03-03 1951-04-03 Frederick G Hehr Sound recording and reproducing apparatus
US2615994A (en) * 1948-12-14 1952-10-28 Lindenberg Theodore Diaphragm for electrostatic loud-speakers
US2616970A (en) * 1948-02-11 1952-11-04 Hartford Nat Bank & Trust Co Device for the transmission by electrical means of oscillations of acoustic frequency
US2745083A (en) * 1949-07-07 1956-05-08 Benjamin L Snavely Transducer, elements therefor, and methods of assembly thereof
US2830283A (en) * 1950-04-18 1958-04-08 Massa Frank Directional characteristics of electroacoustic transducers and method for utilizing the same
US2888517A (en) * 1953-11-02 1959-05-26 Leo C Krazinski System and apparatus for reproducing and re-recording music
DE973570C (de) * 1948-10-02 1960-03-31 Siemens Ag Einrichtung zur plastischen Wiedergabe elektroakustischer Darbietungen
US2973504A (en) * 1951-03-26 1961-02-28 Robert J Bobber Sonic echo system
US2978671A (en) * 1951-08-11 1961-04-04 Harris Transducer Corp Electrodynamic transducer
US2978669A (en) * 1954-03-08 1961-04-04 Harris Transducer Corp Underwater electrodynamic acoustic transducer with air-filled composite diaphragm
US2993090A (en) * 1955-03-16 1961-07-18 Arf Products Electrostatic speaker circuit
US3008013A (en) * 1954-07-20 1961-11-07 Ferranti Ltd Electrostatic loudspeakers
US3061676A (en) * 1959-02-05 1962-10-30 Electro Voice Sound reproducing device
US3135838A (en) * 1958-12-10 1964-06-02 Wright St George Lab Inc Electrostatic loudspeaker
US3457370A (en) * 1965-12-30 1969-07-22 C P Boner & Associates Impedance correcting networks
US4597100A (en) * 1984-05-15 1986-06-24 Rg Dynamics, Inc. Ultra high resolution loudspeaker system
US5373563A (en) * 1990-10-05 1994-12-13 Kukurudza; Vladimir W. Self damping speaker matching device
US5519781A (en) * 1990-10-05 1996-05-21 Kukurudza; Vladimir W. Self damping speaker matching device and method
US5526456A (en) * 1993-02-25 1996-06-11 Renku-Heinz, Inc. Multiple-driver single horn loud speaker
US5615272A (en) * 1995-11-08 1997-03-25 Kukurudza; Vladimir W. Single loud speaker drive system
US5917922A (en) * 1995-11-08 1999-06-29 Kukurudza; Vladimir Walter Method of operating a single loud speaker drive system
WO2000005809A1 (en) * 1998-07-23 2000-02-03 Diaural, Llc Capacitor-less crossover network for electro-acoustic loudspeakers
US6411718B1 (en) 1999-04-28 2002-06-25 Sound Physics Labs, Inc. Sound reproduction employing unity summation aperture loudspeakers
US20040005069A1 (en) * 2002-04-02 2004-01-08 Buck Marshall D. Dual range horn with acoustic crossover
US10484775B1 (en) * 2018-07-16 2019-11-19 Eten Electroncis Limited Earphone structure
RU2795676C1 (ru) * 2023-01-10 2023-05-05 Александр Петрович Каратунов Фильтр для акустической системы

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324926A (en) * 1997-05-01 1998-11-04 David Joseph Geiss Cross-over arrangement for a loudspeaker

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452499A (en) * 1945-08-03 1948-10-26 Hartford Nat Bank & Trust Co Amplifying circuit arrangement
US2474191A (en) * 1947-06-06 1949-06-21 Avco Mfg Corp Tone control
US2539327A (en) * 1947-07-23 1951-01-23 Avco Mfg Corp Cabinet for radio apparatus
US2616970A (en) * 1948-02-11 1952-11-04 Hartford Nat Bank & Trust Co Device for the transmission by electrical means of oscillations of acoustic frequency
DE973570C (de) * 1948-10-02 1960-03-31 Siemens Ag Einrichtung zur plastischen Wiedergabe elektroakustischer Darbietungen
US2615994A (en) * 1948-12-14 1952-10-28 Lindenberg Theodore Diaphragm for electrostatic loud-speakers
US2745083A (en) * 1949-07-07 1956-05-08 Benjamin L Snavely Transducer, elements therefor, and methods of assembly thereof
US2547464A (en) * 1950-03-03 1951-04-03 Frederick G Hehr Sound recording and reproducing apparatus
US2830283A (en) * 1950-04-18 1958-04-08 Massa Frank Directional characteristics of electroacoustic transducers and method for utilizing the same
US2973504A (en) * 1951-03-26 1961-02-28 Robert J Bobber Sonic echo system
US2978671A (en) * 1951-08-11 1961-04-04 Harris Transducer Corp Electrodynamic transducer
US2888517A (en) * 1953-11-02 1959-05-26 Leo C Krazinski System and apparatus for reproducing and re-recording music
US2978669A (en) * 1954-03-08 1961-04-04 Harris Transducer Corp Underwater electrodynamic acoustic transducer with air-filled composite diaphragm
US3008013A (en) * 1954-07-20 1961-11-07 Ferranti Ltd Electrostatic loudspeakers
US2993090A (en) * 1955-03-16 1961-07-18 Arf Products Electrostatic speaker circuit
US3135838A (en) * 1958-12-10 1964-06-02 Wright St George Lab Inc Electrostatic loudspeaker
US3061676A (en) * 1959-02-05 1962-10-30 Electro Voice Sound reproducing device
US3457370A (en) * 1965-12-30 1969-07-22 C P Boner & Associates Impedance correcting networks
US4597100A (en) * 1984-05-15 1986-06-24 Rg Dynamics, Inc. Ultra high resolution loudspeaker system
US5373563A (en) * 1990-10-05 1994-12-13 Kukurudza; Vladimir W. Self damping speaker matching device
US5519781A (en) * 1990-10-05 1996-05-21 Kukurudza; Vladimir W. Self damping speaker matching device and method
US5526456A (en) * 1993-02-25 1996-06-11 Renku-Heinz, Inc. Multiple-driver single horn loud speaker
US5615272A (en) * 1995-11-08 1997-03-25 Kukurudza; Vladimir W. Single loud speaker drive system
US5917922A (en) * 1995-11-08 1999-06-29 Kukurudza; Vladimir Walter Method of operating a single loud speaker drive system
WO2000005809A1 (en) * 1998-07-23 2000-02-03 Diaural, Llc Capacitor-less crossover network for electro-acoustic loudspeakers
US6411718B1 (en) 1999-04-28 2002-06-25 Sound Physics Labs, Inc. Sound reproduction employing unity summation aperture loudspeakers
US20040005069A1 (en) * 2002-04-02 2004-01-08 Buck Marshall D. Dual range horn with acoustic crossover
US7392880B2 (en) 2002-04-02 2008-07-01 Gibson Guitar Corp. Dual range horn with acoustic crossover
US10484775B1 (en) * 2018-07-16 2019-11-19 Eten Electroncis Limited Earphone structure
RU2795676C1 (ru) * 2023-01-10 2023-05-05 Александр Петрович Каратунов Фильтр для акустической системы
RU2820881C1 (ru) * 2024-02-26 2024-06-11 Александр Петрович Каратунов Четырехполосный фильтр для акустической системы

Also Published As

Publication number Publication date
FR613417A (enrdf_load_stackoverflow) 1926-11-17
GB250221A (enrdf_load_stackoverflow) 1927-04-07

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