US2563010A - Device for the stereophonic recording of sound vibrations - Google Patents

Device for the stereophonic recording of sound vibrations Download PDF

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Publication number
US2563010A
US2563010A US618334A US61833445A US2563010A US 2563010 A US2563010 A US 2563010A US 618334 A US618334 A US 618334A US 61833445 A US61833445 A US 61833445A US 2563010 A US2563010 A US 2563010A
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Prior art keywords
microphones
sound vibrations
head
stereophonic recording
base
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US618334A
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Boer Kornelis De
Arend Thomas Van Urk
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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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
    • 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
    • H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/027—Spatial or constructional arrangements of microphones, e.g. in dummy heads

Definitions

  • the present invention likewise concerns a device comprising an artificial head and has for its object to provide a solution which is as effective as the aforesaid method, but much more economical.
  • the device according to the invention is characterized in that the used artificial head constitutes an adjustable acoustic obstacle.
  • the advantage of a device according to the invention consists in that a minimum number of microphones, preferably two, is sufiicient and in that no additional electric circuit arrangements are necessary, so that the assembly will be much cheaper than the common devices.
  • the artificial head consists of two halves which by means of a pin in one half, which fits a hole in the other half, are free to turn with respect to one another, a microphone being secured to each half.
  • the two microphones should extend in a horizontal plane. This can, for instance, be achieved by making the artificial head rest in a base having a hollow, so that it can be given any desired position.
  • Figure 1 represents a device according to the invention entirely ready for use.
  • Figure 2 representing the same device, whose three parts have been detached.
  • the reference numbers I and 2 denote hemispheres having secured to them microphones 3 and 4.
  • the assembly is footed on a base 5.
  • the artificial head is arranged in such a manner that by turning the parts I and 2 relatively to one another the distance between the two microphones is small, so that it may be used for reproducing a speaker.
  • a part of the artificial head is placed on the base in such a manner that the microphones extend in a horizontal plane.
  • Figure 2 shows that the hemisphere 2 is furnished with a pin 6 fitting an aperture 1 of the hemisphere I, so that the hemispheres are free to turn with respect to one another.
  • the base 5 is furnished with an excavation 8 in which the lower sphere is seated.
  • the invention is not limited to the aforesaid forms of construction, since the idea underlying the invention comprises any device in which the microphones on the artificial head are movable with respect to each other, to which end they may be so mounted as to be movable on the artificial head.
  • Another possibility consists in a modification in shape or volume of the artificial head itself.
  • the artificial head need not be spherical, since it may be desirable to give it a different shape for the obtaimnent of definite eifects.
  • a device for the stereophonic recording of sound vibrations comprising a head member having a pair of portions, means for mounting one of said portions in rotatable relationship to said other of said portions, and microphones attached to each said portion and spaced apart with respect to each other, said member constituting an acoustical obstacle between said microphones, said microphones being adjustably positionable with respect to each other upon rotative motion of said portions relative to each other.
  • a device for the stereophonic recording of sound vibrations comprising two substantially hemispherical members, said members being rotatably joined together to form a substantially spherical head, and two microphones one secured to each said member and spaced apart, said head constituting an acoustical obstacle between said microphones, a, base member, and means on said base member for mounting one of said rotatable hemispherical members of said head for universal adjustment therewith, and means whereby said microphones are adjustably positionable with respect to each other in a desired plane upon rotation of one of said members relative to the other and movement of said one rotatable hemispherical member on said base.
  • a device for the stereophonic recording of sound vibrations comprising two substantially 10 hemispherical members each having an axis of symmetry, each of said members being concentric and coaxially positioned to form a substantially spherical head, a pin coaxially positioned in said head, one of said members being adjustably rotatable about said pin with respect to the other member, two microphones one secured to each said member and being adjustably positionable with respect to each other upon rotation of one of said hemispherical members, said head constituting an acoustical obstacle between said microphones, and a base having a, spherically hollow portion to provide a rest for said head.
  • AREND THOMAS VAN URK AREND THOMAS VAN URK.

Description

Alig. 7, 1951 DE BOER ETAL 2,563,010
DEVICE FOR THE STEREOPHONIC RECORDING OF SOUND VIBRATIONS Filed Sept. 24, 1945 ATTORNEY Patented Aug. 7, I951 FOR THE STEREO PHONIC RECORD- ING OF SOUND VIBRATIONS Kornelis de Boer and Arend Thomas van Urk, v,Eindhoven, Netherlands, assignors to Hartford National Bank & Trust 00., Hartford, Conn, as
trustee Application September 24, 1945, Serial No. 618,334 In the Netherlands May 17,1943
' Section 1, Public Law 690, August s, 1946 Patent expires Mas 17, 1963 3 Claims. 1
Inthe stereophonic recording of sound vibrations by means of two microphones that are spaced apart from each other this distance, as is well known, must be different for different sound sources. In fact, in reproducing a whole orchestra this distance will have to be larger than in reproducing a single speaker, for instance, an actor, for as faithful as possible a reproduction.
In the case of two microphones being positioned independently from each other this involves little difficulties. Trouble is experienced, however, when making use of a so-called artificial head i. e. a preferably spherical body with two microphones provided on either side, which body constitutes an acoustic obstacle to sound vibrations. In this case several artificial heads having different diameters will be necessary, which is not only cumbersome, but also comparatively expensive.
In conjunction therewith it has already been proposed to equip such an artificial head with four microphones, two on either side, which are electrically intercoupled in such a manner that the apparent distance between the two microphone combinations is variable.
The present invention likewise concerns a device comprising an artificial head and has for its object to provide a solution which is as effective as the aforesaid method, but much more economical.
The device according to the invention is characterized in that the used artificial head constitutes an adjustable acoustic obstacle.
The advantage of a device according to the invention consists in that a minimum number of microphones, preferably two, is sufiicient and in that no additional electric circuit arrangements are necessary, so that the assembly will be much cheaper than the common devices.
According to one form of construction of the device the artificial head consists of two halves which by means of a pin in one half, which fits a hole in the other half, are free to turn with respect to one another, a microphone being secured to each half.
For a faithful reproduction, it is desirable that the two microphones should extend in a horizontal plane. This can, for instance, be achieved by making the artificial head rest in a base having a hollow, so that it can be given any desired position.
In order that the invention may be clearly understood and readily carried into effect, it will now be described more fully with reference to the accompanying drawin given by way of example.
Figure 1 represents a device according to the invention entirely ready for use.
Figure 2 representing the same device, whose three parts have been detached.
In the drawing the reference numbers I and 2 denote hemispheres having secured to them microphones 3 and 4. The assembly is footed on a base 5. In Figure 1 the artificial head is arranged in such a manner that by turning the parts I and 2 relatively to one another the distance between the two microphones is small, so that it may be used for reproducing a speaker. Moreover, a part of the artificial head is placed on the base in such a manner that the microphones extend in a horizontal plane.
Figure 2 shows that the hemisphere 2 is furnished with a pin 6 fitting an aperture 1 of the hemisphere I, so that the hemispheres are free to turn with respect to one another. The base 5 is furnished with an excavation 8 in which the lower sphere is seated. As a result thereof it can be achieved in all cases occurring in practice that the two microphones extend in a horizontal plane by turning the spheres in the base.
Of course, the invention is not limited to the aforesaid forms of construction, since the idea underlying the invention comprises any device in which the microphones on the artificial head are movable with respect to each other, to which end they may be so mounted as to be movable on the artificial head. Another possibility consists in a modification in shape or volume of the artificial head itself. Also in this case the artificial head need not be spherical, since it may be desirable to give it a different shape for the obtaimnent of definite eifects.
What we claim is:
1. A device for the stereophonic recording of sound vibrations, comprising a head member having a pair of portions, means for mounting one of said portions in rotatable relationship to said other of said portions, and microphones attached to each said portion and spaced apart with respect to each other, said member constituting an acoustical obstacle between said microphones, said microphones being adjustably positionable with respect to each other upon rotative motion of said portions relative to each other.
2. A device for the stereophonic recording of sound vibrations comprising two substantially hemispherical members, said members being rotatably joined together to form a substantially spherical head, and two microphones one secured to each said member and spaced apart, said head constituting an acoustical obstacle between said microphones, a, base member, and means on said base member for mounting one of said rotatable hemispherical members of said head for universal adjustment therewith, and means whereby said microphones are adjustably positionable with respect to each other in a desired plane upon rotation of one of said members relative to the other and movement of said one rotatable hemispherical member on said base.
3. A device for the stereophonic recording of sound vibrations, comprising two substantially 10 hemispherical members each having an axis of symmetry, each of said members being concentric and coaxially positioned to form a substantially spherical head, a pin coaxially positioned in said head, one of said members being adjustably rotatable about said pin with respect to the other member, two microphones one secured to each said member and being adjustably positionable with respect to each other upon rotation of one of said hemispherical members, said head constituting an acoustical obstacle between said microphones, and a base having a, spherically hollow portion to provide a rest for said head.
KORNELIS DE BOER.
AREND THOMAS VAN URK.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 15 1,329,925 Perkins Feb. 3, 1920 1,855,146 Jones Apr. 19, 1932 1,855,149 Jones Apr. 19, 1932 2,414,695 Massa Jan. 21, 1947
US618334A 1943-05-17 1945-09-24 Device for the stereophonic recording of sound vibrations Expired - Lifetime US2563010A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL626086X 1943-05-17

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US2563010A true US2563010A (en) 1951-08-07

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US (1) US2563010A (en)
BE (1) BE455912A (en)
DE (1) DE879704C (en)
FR (1) FR905354A (en)
GB (1) GB626086A (en)
NL (1) NL69032C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787183A (en) * 1954-05-24 1957-04-02 Donald J Russo Microphone arrangement for accordions
US3070658A (en) * 1956-08-31 1962-12-25 Philips Corp Stereophonic sound collecting device
US4068091A (en) * 1975-07-30 1978-01-10 Sony Corporation Binaural sound pickup
US4119798A (en) * 1975-09-04 1978-10-10 Victor Company Of Japan, Limited Binaural multi-channel stereophony
US4675906A (en) * 1984-12-20 1987-06-23 At&T Company, At&T Bell Laboratories Second order toroidal microphone
US5627901A (en) * 1993-06-23 1997-05-06 Apple Computer, Inc. Directional microphone for computer visual display monitor and method for construction
US5793873A (en) * 1996-07-07 1998-08-11 Visual Sound Limited Partnership Sound capturing method and device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3509376A1 (en) * 1984-03-27 1985-11-07 Head Stereo GmbH Kopfbezogene Aufnahme- und Wiedergabetechnik, 8000 München ART HEAD MEASURING SYSTEM
DE3512155A1 (en) * 1985-04-03 1985-10-31 Gerhard 4330 Mülheim Woywod Electroacoustic arrangement for directionally orientated three-dimensional hearing
DE3600011C2 (en) * 1986-01-02 1994-08-25 J Hinrich Prof Dr Peters Artificial head recording arrangement
GB2246861B (en) * 1990-08-06 1992-10-07 David Geoffrey Edwards Blast gauge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329925A (en) * 1917-05-22 1920-02-03 Frances W Perkins Sound detector and recorder
US1855149A (en) * 1927-04-13 1932-04-19 Jones W Bartlett Method and means for the ventriloquial production of sound
US1855146A (en) * 1928-12-14 1932-04-19 Jones W Bartlett Method and apparatus for audition
US2414695A (en) * 1939-10-31 1947-01-21 Rca Corp Apparatus for locating sound sources

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329925A (en) * 1917-05-22 1920-02-03 Frances W Perkins Sound detector and recorder
US1855149A (en) * 1927-04-13 1932-04-19 Jones W Bartlett Method and means for the ventriloquial production of sound
US1855146A (en) * 1928-12-14 1932-04-19 Jones W Bartlett Method and apparatus for audition
US2414695A (en) * 1939-10-31 1947-01-21 Rca Corp Apparatus for locating sound sources

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787183A (en) * 1954-05-24 1957-04-02 Donald J Russo Microphone arrangement for accordions
US3070658A (en) * 1956-08-31 1962-12-25 Philips Corp Stereophonic sound collecting device
US4068091A (en) * 1975-07-30 1978-01-10 Sony Corporation Binaural sound pickup
US4119798A (en) * 1975-09-04 1978-10-10 Victor Company Of Japan, Limited Binaural multi-channel stereophony
US4675906A (en) * 1984-12-20 1987-06-23 At&T Company, At&T Bell Laboratories Second order toroidal microphone
US5627901A (en) * 1993-06-23 1997-05-06 Apple Computer, Inc. Directional microphone for computer visual display monitor and method for construction
US5793873A (en) * 1996-07-07 1998-08-11 Visual Sound Limited Partnership Sound capturing method and device
US6714653B1 (en) 1996-07-07 2004-03-30 Douglas Peter Magyari Sound capturing method and device

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FR905354A (en) 1945-12-03
BE455912A (en)
NL69032C (en)
DE879704C (en) 1953-06-15
GB626086A (en) 1949-07-08

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