US3881056A - Parabolic sound reflecting microphone holder - Google Patents

Parabolic sound reflecting microphone holder Download PDF

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Publication number
US3881056A
US3881056A US347056A US34705673A US3881056A US 3881056 A US3881056 A US 3881056A US 347056 A US347056 A US 347056A US 34705673 A US34705673 A US 34705673A US 3881056 A US3881056 A US 3881056A
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United States
Prior art keywords
parabolic
microphone
sound reflecting
inches
shaft
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Expired - Lifetime
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US347056A
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English (en)
Inventor
Daniel Armstrong Gibson
Robert Justin Ryan
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Publication of US3881056A publication Critical patent/US3881056A/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
    • 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
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/342—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for microphones

Definitions

  • PARABOLIC SOUND REFLEC'IING MICROPHONE HOLDER Inventors: Daniel Armstrong Gibson. 6 Dunloe Rd.. Toronto, Ontario; Robert Justin Ryan. 1 14 Newport Ave.. Scarborough. Ontario. both of Canada Filed: Apr. 2, 1973 Appl. No.: 347,056
  • a parabolic sound reflecting microphone holder is disclosed made of a transparent plastics material about 18 inches in diameter and from 0.080 to 0.125 inches thick having good acoustic properties in the low frequency range of from about 150 to 500 cycles per sec- 1 Claim, 3 Drawing Figures 1 PARABOLIC SOUND REFLECTING MICROPHONE .1 HOLDER FIELD OF THE INVENTION
  • This invention relates to parabolic, sound reflecting, microphone holders and in particular to such a device that is small enough to be hand held, that is transparent for easy microphone aiming and that has good acoustic properties in the low frequency range of between I50 and 500 cycles per second.
  • Parabolic sound reflectors for use with microphones and other acoustic equipment are by no means new. World War II saw extensive development in this field, particularly by the Japanese. Subsequently parabolic sound reflectors havebe'en used extensively for such things as recording bird sounds at a distance and for other applications which require a directional and long range microphone.
  • parabolic sound reflectors of the prior art were made of metal spinnings or of glass fibre reinforced plastics. While such parabolic sound reflectors were useful in conjunction with a microphone and a tape recorder for recording relatively high frequency sounds, they could not give good fidelity when used to record relatively low frequency sounds such as the human voice unless they were made in a size such that they required the support of a tripod or similar device;
  • the prior art failed to provide a hand held and aimed sound reflector for use with, for example, the microphone of a portable tape recorder.
  • a second principle defect of the prior art sound reflectors is their opacity. Since to operate efficiently, the microphone must be at the focus of the parabolic surface and the axis of the parabolic surface must point directly at the sound source, aiming is an important factor in making use of a parabolic sound reflector.
  • Parabolic sound reflectors of the prior art are aimed in one of two ways.
  • the sound reflector may be provided with a small aperture through which the operator may sight along a line parallel to the axis of the parabolic surface. This aperture shouldbe kept as small as possible so as to minimize the effect upon the sound reflecting properties of the device.
  • the sound reflector may be aimed electronically. That is, by observing an instrument such as a recording level meter to determine in this way the position which gives maximum signal level and hence the positionof optimum aiming.
  • the present invention is the result of a discovery which makes it possible to construct a sound reflector meeting three criteria, namely:
  • the PARABOLIC SOUND REFLECTING MICRO- PHONE HOLDER of the present invention fulfills these three criteria.
  • a diameter of approximately 18 inches was taken to be the optimum size.
  • the curvature of the parabolic surface is such that the focus lies in the plane containing the rim when the rim diameter is 18 inches.
  • the thickness of the material should be between 0.080 inches and 0.125 inches in order to present the best compromise between lightness and adequate rigidity to retain a reasonably accurate shape under most conditions.
  • the signal level using a microphone sold under the trade mark SI-IURE 425 COMANDO and a cellulose acetate butyrate sound reflector having the size, curvature and thickness described above was about higher than that when using a similar sound reflector made from an acrylic material and about 125% higher than that when using a sound reflector made from a polycarbonate material.
  • the superiority of the cellulose acetate butyrate material is most marked in the low frequency ranges. its superior properties are noted throughout the range of frequencies up to the high audible ranges except for various spaced points at which its performance may be equalled or approximated by the other materials investigated. Overall, however, the cellulose acetate butyrate material demonstrates a consistent and marked acoustic superiority as explained above.
  • Metal and glass fibre reinforced materials do not give an adequate response in the l50 to 500 cycles per second range in sizes less than about 36 to 48 inches in diameter, a size which is too heavy and cumbersome for hand held use.
  • a parabolic sound reflector is illustrated at made from cellulose acetate butyrate and having a wall thickness of between 0.080 and 0.125 inches and a rim diameter of approximately 18 inches.
  • the rim may conveniently be reinforced by flanges such as 11 and 12 extending about the perimeter.
  • a shaft 13 passes through the sound reflector 10 and, on the side 10a of the parabolic shell adjacent the sound reflecting surface is provided a bracket 14 adapted to support a microphone 15 which will lie upon the axis 16 oflthe parabolic surface with the microphone head or diaphragm lying at the focus 17 of the parabolic surface.
  • the shaft On the opposite side of the parabolic shell the shaft supports a handle 18 by means of which the assembly may be hand held and aimed.
  • electrical connections to the microphone pass internally of the handle, the shaft 13, and the bracket 14 and may be connected to a cord exiting from the handle as indicated at 19.
  • an aiming guide 20 may be provided, and a microphone switch may be located at 21.
  • the bracket 14 is removably mounted upon shaft 13 by any convenient socket located at, for example, 22.
  • FIG. 2 The method of securing the shaft 13 to the parabolic sound reflector 10 is illustrated in FIG. 2.
  • the reflector 10 is provided with a circular recess 23 having a central aperture 24 which is provided with four radially extending, mutually perpendicular slots 25.
  • a circular flange 26 is provided having lugs 27 and a central cylindrical collet chuck 28 provided with external threads 29. The flange 26 is adapted to seat within the circular recess 23 with the lugs 27 entering the slots 25 to present rotation.
  • the shaft 13 may then be passed through the collet 28 and the collar 30 passed over the shaft 13.
  • the collar 30 is provided with four recesses 31 adapted to receive the lugs 27 where they extend through the thickness of the wall of the recess 23.
  • a resilient O-ring 32 is then placed about the shaft 13 and finally a nut 33 is applied to engage threads 29 and firmly clamp the collet 28 onto the shaft 13 to hold it rigidly in place.
  • a light weight, hand held sound reflecting parabola and microphone holder assembly comprising:
  • handle means carried by the shaft on the side of the parabolic shell remote from the sound reflecting surface to enable the human hand to grasp and support the sound reflecting parabola and microphone holder assembly;
  • parabolic shell being:

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
US347056A 1971-08-23 1973-04-02 Parabolic sound reflecting microphone holder Expired - Lifetime US3881056A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA121,243A CA967887A (en) 1971-08-23 1971-08-23 Parabolic sound reflecting microphone holder

Publications (1)

Publication Number Publication Date
US3881056A true US3881056A (en) 1975-04-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US347056A Expired - Lifetime US3881056A (en) 1971-08-23 1973-04-02 Parabolic sound reflecting microphone holder

Country Status (5)

Country Link
US (1) US3881056A (enExample)
CA (1) CA967887A (enExample)
DE (1) DE2319048A1 (enExample)
FR (1) FR2226798B3 (enExample)
GB (1) GB1425982A (enExample)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007091A (en) * 1987-04-23 1991-04-09 Utk Uuden Teknologian Keskus Oy Procedure and device for facilitating audiovisual observation of a distant object
USD324219S (en) 1989-05-30 1992-02-25 Silver Creek Nurseries, Inc. Combined microphone and parabolic reflector
US5371804A (en) * 1987-12-18 1994-12-06 Actron Manufacturing Company Voice transmission system
USD358407S (en) 1994-01-06 1995-05-16 Edward Verville Sound reflector to the microphone of a video camera
US5428688A (en) * 1993-03-29 1995-06-27 Audiopack Sounds Systems Voice transmission system with remote microphone
US5463693A (en) * 1993-11-10 1995-10-31 Audiopack Sound Systems Inc. Voice amplification adapter assembly for face mask
RU2168818C1 (ru) * 1999-11-03 2001-06-10 Акционерное общество открытого типа "Лантан" Комбинированная радио-и акустическая антенна
US6408080B1 (en) * 1999-11-29 2002-06-18 Intel Corporation Boundary layer microphone
US6438238B1 (en) * 2000-07-14 2002-08-20 Thomas F. Callahan Stethoscope
US6498859B2 (en) 2001-05-10 2002-12-24 Randy H. Kuerti Microphone mount
US6556687B1 (en) * 1998-02-23 2003-04-29 Nec Corporation Super-directional loudspeaker using ultrasonic wave
US20040114778A1 (en) * 2002-12-11 2004-06-17 Gobeli Garth W. Miniature directional microphone
US6842528B2 (en) 2001-05-10 2005-01-11 Randy H. Kuerti Microphone mount
US20070183607A1 (en) * 2006-02-09 2007-08-09 Sound & Optics Systems, Inc. Directional listening device
USD603848S1 (en) 2008-11-24 2009-11-10 Speedcom Communication, Inc. Noise cancelling microphone
US20100031806A1 (en) * 2008-08-05 2010-02-11 Gaynier David A Electroacoustic Transducer System
US20100067727A1 (en) * 2008-09-17 2010-03-18 Speedcom Communications Inc. Noise cancelling microphone with wind shield
US20140356164A1 (en) * 2013-05-28 2014-12-04 Michael J. Asheim Apparatus to detect aerodynamic conditions of blades of wind turbines
US9014402B2 (en) 2012-05-16 2015-04-21 Klover Products, Inc. Acoustically isolated parabolic sound pickup assembly
WO2015056443A1 (ja) * 2013-10-15 2015-04-23 パナソニックＩｐマネジメント株式会社 マイクロホン
WO2015085178A1 (en) * 2013-12-06 2015-06-11 Scheller Mark W Acoustic electronic device dock
FR3030093A1 (fr) * 2014-12-16 2016-06-17 Bouygues Sa Dispositif de captation sonore
RU2643690C2 (ru) * 2016-02-20 2018-02-05 Ордена трудового Красного Знамени федеральное государственное бюджетное образовательное учреждение высшего образования "Московский технический университет связи и информатики" (МТУСИ) Способ корректировки направления оси отражательного приемника звуковых волн на визуально трудно наблюдаемые или ненаблюдаемые источники звука
US9992569B2 (en) 2014-05-30 2018-06-05 Paul D. Terpstra Camera-mountable acoustic collection assembly
US10038950B2 (en) * 2016-07-22 2018-07-31 Avi Avliav Microphone cover/reflector
USD886081S1 (en) 2018-10-24 2020-06-02 Matthew GOINS Sound reflector
US10701481B2 (en) 2018-11-14 2020-06-30 Townsend Labs Inc Microphone sound isolation baffle and system
EP3984498A1 (en) 2020-10-19 2022-04-20 Koninklijke Philips N.V. Cleaning unit for a surface cleaning device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126783A1 (de) * 1983-05-25 1984-12-05 Head Stereo GmbH , Kopfbezogene Aufnahme- und Wiedergabetechnik & Co. Messtechnik KG Ein breitbandiger rauscharmer Kunstkopf mit hoher Dynamik und der Eigenschaft der originalgetreuen Übertragung von Hörereignissen
DE102011117343A1 (de) 2011-10-30 2013-05-02 Erwin Fliegel Reflektorelement für Musikinstrumente

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899994A (en) * 1931-08-28 1933-03-07 Radio Keith Orpheum Corp Conversion of sound into electrical impulses
US1899966A (en) * 1931-08-14 1933-03-07 Rca Corp Sound pick-up device
US1911772A (en) * 1933-05-30 Fornia
US2049586A (en) * 1932-03-09 1936-08-04 Rca Corp Single reflector type microphone
US3305043A (en) * 1965-03-08 1967-02-21 Charles E Pfund Acoustic communication device and toy
US3723962A (en) * 1970-10-09 1973-03-27 F Hotchner Apparatus for indicating the direction to a sound pulse source

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1911772A (en) * 1933-05-30 Fornia
US1899966A (en) * 1931-08-14 1933-03-07 Rca Corp Sound pick-up device
US1899994A (en) * 1931-08-28 1933-03-07 Radio Keith Orpheum Corp Conversion of sound into electrical impulses
US2049586A (en) * 1932-03-09 1936-08-04 Rca Corp Single reflector type microphone
US3305043A (en) * 1965-03-08 1967-02-21 Charles E Pfund Acoustic communication device and toy
US3723962A (en) * 1970-10-09 1973-03-27 F Hotchner Apparatus for indicating the direction to a sound pulse source

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007091A (en) * 1987-04-23 1991-04-09 Utk Uuden Teknologian Keskus Oy Procedure and device for facilitating audiovisual observation of a distant object
US5371804A (en) * 1987-12-18 1994-12-06 Actron Manufacturing Company Voice transmission system
USD324219S (en) 1989-05-30 1992-02-25 Silver Creek Nurseries, Inc. Combined microphone and parabolic reflector
US5428688A (en) * 1993-03-29 1995-06-27 Audiopack Sounds Systems Voice transmission system with remote microphone
US5463693A (en) * 1993-11-10 1995-10-31 Audiopack Sound Systems Inc. Voice amplification adapter assembly for face mask
USD358407S (en) 1994-01-06 1995-05-16 Edward Verville Sound reflector to the microphone of a video camera
US6556687B1 (en) * 1998-02-23 2003-04-29 Nec Corporation Super-directional loudspeaker using ultrasonic wave
RU2168818C1 (ru) * 1999-11-03 2001-06-10 Акционерное общество открытого типа "Лантан" Комбинированная радио-и акустическая антенна
US6408080B1 (en) * 1999-11-29 2002-06-18 Intel Corporation Boundary layer microphone
US6438238B1 (en) * 2000-07-14 2002-08-20 Thomas F. Callahan Stethoscope
US6498859B2 (en) 2001-05-10 2002-12-24 Randy H. Kuerti Microphone mount
US6842528B2 (en) 2001-05-10 2005-01-11 Randy H. Kuerti Microphone mount
US20040114778A1 (en) * 2002-12-11 2004-06-17 Gobeli Garth W. Miniature directional microphone
US20070183607A1 (en) * 2006-02-09 2007-08-09 Sound & Optics Systems, Inc. Directional listening device
US8003878B2 (en) * 2008-08-05 2011-08-23 Gaynier David A Electroacoustic transducer system
US20100031806A1 (en) * 2008-08-05 2010-02-11 Gaynier David A Electroacoustic Transducer System
US20100067727A1 (en) * 2008-09-17 2010-03-18 Speedcom Communications Inc. Noise cancelling microphone with wind shield
US8351633B2 (en) 2008-09-17 2013-01-08 Teodoro Lassally Noise cancelling microphone with wind shield
USD603848S1 (en) 2008-11-24 2009-11-10 Speedcom Communication, Inc. Noise cancelling microphone
US9014402B2 (en) 2012-05-16 2015-04-21 Klover Products, Inc. Acoustically isolated parabolic sound pickup assembly
US9528493B2 (en) * 2013-05-28 2016-12-27 Siemens Aktiengesellschaft Apparatus to detect aerodynamic conditions of blades of wind turbines
US20140356164A1 (en) * 2013-05-28 2014-12-04 Michael J. Asheim Apparatus to detect aerodynamic conditions of blades of wind turbines
US10154340B2 (en) 2013-10-15 2018-12-11 Panasonic Intellectual Property Management Co., Ltd. Microphone
WO2015056443A1 (ja) * 2013-10-15 2015-04-23 パナソニックＩｐマネジメント株式会社 マイクロホン
WO2015085178A1 (en) * 2013-12-06 2015-06-11 Scheller Mark W Acoustic electronic device dock
US20170004814A1 (en) * 2013-12-06 2017-01-05 Mark W. SCHELLER Acoustic electronic device dock
US9992569B2 (en) 2014-05-30 2018-06-05 Paul D. Terpstra Camera-mountable acoustic collection assembly
FR3030093A1 (fr) * 2014-12-16 2016-06-17 Bouygues Sa Dispositif de captation sonore
RU2643690C2 (ru) * 2016-02-20 2018-02-05 Ордена трудового Красного Знамени федеральное государственное бюджетное образовательное учреждение высшего образования "Московский технический университет связи и информатики" (МТУСИ) Способ корректировки направления оси отражательного приемника звуковых волн на визуально трудно наблюдаемые или ненаблюдаемые источники звука
US10038950B2 (en) * 2016-07-22 2018-07-31 Avi Avliav Microphone cover/reflector
USD886081S1 (en) 2018-10-24 2020-06-02 Matthew GOINS Sound reflector
US10701481B2 (en) 2018-11-14 2020-06-30 Townsend Labs Inc Microphone sound isolation baffle and system
EP3984498A1 (en) 2020-10-19 2022-04-20 Koninklijke Philips N.V. Cleaning unit for a surface cleaning device
WO2022084126A1 (en) 2020-10-19 2022-04-28 Koninklijke Philips N.V. Cleaning unit for a surface cleaning device

Also Published As

Publication number Publication date
FR2226798B3 (enExample) 1976-04-09
CA967887A (en) 1975-05-20
DE2319048A1 (de) 1974-10-31
GB1425982A (en) 1976-02-25
FR2226798A1 (enExample) 1974-11-15

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