US2623957A - Microphone windshield - Google Patents

Microphone windshield Download PDF

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Publication number
US2623957A
US2623957A US776567A US77656747A US2623957A US 2623957 A US2623957 A US 2623957A US 776567 A US776567 A US 776567A US 77656747 A US77656747 A US 77656747A US 2623957 A US2623957 A US 2623957A
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US
United States
Prior art keywords
inch
microphone
screen
face
tones
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 - Lifetime
Application number
US776567A
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English (en)
Inventor
Cragg William Donald
Gayford Michael Lawrence
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US2623957A publication Critical patent/US2623957A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/11—Supports for sets, e.g. incorporating armrests
    • 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
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • H04R1/086—Protective screens, e.g. all weather or wind screens

Definitions

  • This invention relates to microphones such as are used for radio broadcasting and public address purposes and which may frequently be used out of doors.
  • the object of the invention is to devise special means to reduce the electrical or noise output of a microphone .due to a high Wind, without seriously depreciating the response frequency characteristic of the microphone or makin it unwieldy.
  • a microphone is constructed so that none of its parts in the air path to its pressure sensitive electrical element has a cross sectional dimension substantially greater than .0075 inch in a plane normal to the direction in which the microphone is designed to respond or so that none of its parts in the aforesaid air path has a diameter substantially greater than .0075 inch.
  • Such eddies having frequencies in the upper sound range are known as Aeolian tones, while in the lower range they are known as eddy tones.
  • tones of 7000 C. P. S. will be produced by a diameter of or about .0075 inch; e. g. wire of 36 S. W. G.; tones of 10,000 C. P. S. by a diameter of .0055 inch, and of 5000 C. P. S. by .011 inch. It is proposed therefore to avoid any solid section having a cross sectional dimension substantially greater than .0075 inch in a plane normal to any direction for which the microphone to be shielded is designed to respond.
  • the tones produced are known as eddy tones and such tones of frequency about 50 C. P. S. would be produced by a diameter of inch inchesroughly one inch
  • the overall diameter or lateral dimension of the shield should not be less than one inch, a requirement not likely to give rise to difiiculty.
  • any eddy tones will be a minimum for stream lined body.
  • the outer surface of the assembly should be free from sharp discontinuities and re-entrant surfaces which would generate eddy tones, and edge tones caused when an air stream is forced through a slit.
  • a wind shield should not appreciably reduce the sensitivity of a microphone to sound waves in the range -10,000 C. P. S. and. the shield should be mechanically robust, easily attached and detached, and should not make the microphone unwieldy.
  • the wind shield comprises a spring clamp ring 4 adapted to encircle the rim 3 and carrying a substantially hemispherical woven screen 5 supported by a roughly hemispherical block 6 of fine filaments, the material and the gauge and spacing of the screen and block being such that they share substantially equally in the shielding effect.
  • the screen 5 is woven from silk or stainless steel thread having a diameter of not substantially more than .0075 inch, which may if desired be reduced to about .0055 inch.
  • the filaments are spaced about 50 threads to the inch.
  • the block is preferably of rubberised hair with an approximate density of 500 filaments to the square inch.
  • Rubberised hair consists of horse hair or the like each with thin coating of rubber which sticks the hairs together at spaced positions.
  • the windshield and microphone together have a substantially spherical form without sharp discontinuities.
  • the level of noise caused by winds in the range 10 to 30 M. P. H. is reduced between 12 and 16 db whilst the attenuation of sound waves in the range 50 to 10,000 C. P. S. is negligible, except at the extreme high frequencies where there may be an attenuation of about 5 db.
  • a wind shield for a microphone having a housing and a sound receiving face, said shield comprising a substantially hemispherical screen adapted to be mounted on said housing in front of said face with the interior of said screen facing said face, said screen comprising a plurality of filaments having a spacing between 50 and 150 per inch and each filament having a cross section in a direction normal to a radius of said hemi-' sphere intersecting the filament at least as small as .0075 inch, and a substantially hemispherical 1 block of fine filaments mounted between said screen and said face with the hemispherical surface of said block facing said interior of said screen.
  • a wind shield for a microphone having a 1 housing and a sound receiving face
  • said wind shield comprising a substantially hemispherical screen adapted to be mounted on said housing in front of said face with the interior of said screen facing said face, said screen comprising 'a woven fabric or filaments having a diameter between .0055 and .0075 inch and having a span ing between 50 and 150 per inch, and a substantially hemispherical block of rubberized 'hair mounted between said screen and said face with the hemispherical surface of said block facing said interior of said screen.
  • a wind shield for a microphone having a housing and a sound receiving face
  • said wind shield comprising a substantially hemispherical screen adapted to be mounted on said housing in front of said face with the interior of said screen facing said face, said screen comprising a woven fabric of filaments having a diameter between .0055 and .0075 inch and having a spacing between and per inch, and a substantially hemispherical block of rubberized hair, said hair being distributed throughout said block substantially uniformly and with a density of substantially 500 hairs to the square inch and said block being mounted between said screen and said face with the hemispherical surface of said block facing said interior of said screen.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Woven Fabrics (AREA)
US776567A 1946-10-02 1947-09-27 Microphone windshield Expired - Lifetime US2623957A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29362/46A GB625743A (en) 1946-10-02 1946-10-02 Improvements in or relating to microphones

Publications (1)

Publication Number Publication Date
US2623957A true US2623957A (en) 1952-12-30

Family

ID=10290329

Family Applications (1)

Application Number Title Priority Date Filing Date
US776567A Expired - Lifetime US2623957A (en) 1946-10-02 1947-09-27 Microphone windshield

Country Status (4)

Country Link
US (1) US2623957A (enrdf_load_html_response)
BE (2) BE477840A (enrdf_load_html_response)
FR (2) FR57883E (enrdf_load_html_response)
GB (2) GB625743A (enrdf_load_html_response)

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969417A (en) * 1957-05-01 1961-01-24 Birtcher Corp Adjustable electrical instruments
US3116376A (en) * 1962-03-28 1963-12-31 Maico Electronics Inc Acoustical device
US3585317A (en) * 1968-01-04 1971-06-15 Astatic Corp Cardioid microphone
US3642558A (en) * 1968-08-28 1972-02-15 Akustische Uber Kino Gerate Gm Decorative arrangement for microphone assemblies
US4057124A (en) * 1975-12-30 1977-11-08 Braden Harold C Sound suppressor
US4065648A (en) * 1976-10-12 1977-12-27 The Astatic Corporation Microphone screen
US4712429A (en) * 1985-07-16 1987-12-15 The United States Of America As Represented By The Secretary Of The Army Windscreen and two microphone configuration for blast noise detection
US4975966A (en) * 1989-08-24 1990-12-04 Bose Corporation Reducing microphone puff noise
US5105394A (en) * 1988-07-29 1992-04-14 United States Of America As Represented By The Secretary Of The Navy Constrained diaphragm transducer
US5127870A (en) * 1991-07-16 1992-07-07 You Hsing Plastics Co, Ltd. Echo-type toy megaphone
US5349140A (en) * 1992-08-07 1994-09-20 Valenzin Lawrence R Microphone windscreen
US5444790A (en) * 1994-02-28 1995-08-22 Shure Brothers, Inc. Microphone windscreen mounting
USD396862S (en) 1997-09-22 1998-08-11 Parris Morgan Microphone filter
USD415163S (en) * 1998-07-17 1999-10-12 Yoga Electonics Co., Ltd. Microphone
USD448364S1 (en) 2000-09-01 2001-09-25 Taky Electronics Co., Ltd. Microphone
USD450684S1 (en) 2000-11-15 2001-11-20 Parris Morgan Microphone filter
USD457876S1 (en) 2000-09-01 2002-05-28 Taky Electronics Co., Ltd. Microphone
US6935458B2 (en) 2001-09-25 2005-08-30 Thomas G. Owens Microphone shroud and related method of use
USD525238S1 (en) * 2005-01-18 2006-07-18 Stedman Corporation Pop screen filter assembly
USD540786S1 (en) * 2004-06-11 2007-04-17 Dpa Microphones A/S Microphone holder and windcover
USD551661S1 (en) * 2006-06-30 2007-09-25 Baltic Latvian Universal Electronics Microphone
USD586335S1 (en) * 2007-10-04 2009-02-10 Baltic Latvian Universal Electronics Snowflake microphone
USD603848S1 (en) 2008-11-24 2009-11-10 Speedcom Communication, Inc. Noise cancelling microphone
US20100067727A1 (en) * 2008-09-17 2010-03-18 Speedcom Communications Inc. Noise cancelling microphone with wind shield
USD729778S1 (en) * 2013-08-26 2015-05-19 Baltic Latvian Universal Electronics Llc Microphone
USD746796S1 (en) * 2014-12-29 2016-01-05 Gibson Brands, Inc. Microphone
USD747296S1 (en) * 2014-12-29 2016-01-12 Gibson Brands, Inc. Microphone
USD760204S1 (en) * 2015-01-05 2016-06-28 Gibson Brands, Inc. Microphone
USD760203S1 (en) * 2015-01-05 2016-06-28 Gibson Brands, Inc. Microphone
USD760704S1 (en) * 2015-01-05 2016-07-05 Gibson Brands, Inc. Microphone
USD864904S1 (en) * 2019-06-07 2019-10-29 Shenzhen Godo Cultural Originality Co., Ltd. Wireless loudspeaker
USD901459S1 (en) * 2020-07-15 2020-11-10 Yang Zhao Microphone pop filter
USD991229S1 (en) * 2021-09-22 2023-07-04 Shenzhen Lanque Shangpin Trading Co., Ltd. Microphone set
USD1056882S1 (en) * 2023-03-07 2025-01-07 Logitech Europe S.A. Microphone
USD1081633S1 (en) * 2023-03-22 2025-07-01 Focusound Inc. Portable microphone isolation shield with pop filter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8525429D0 (en) * 1985-10-16 1985-11-20 Rycote Microphone Windshields Microphone windshields
GB2446619A (en) * 2007-02-16 2008-08-20 Audiogravity Holdings Ltd Reduction of wind noise in an omnidirectional microphone array

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US588034A (en) * 1897-08-10 S peters co
US1901065A (en) * 1931-03-27 1933-03-14 Radio Keithorpheum Corp Microphone windshield
GB425186A (en) * 1933-11-24 1935-03-08 Alfred Graham & Co Ltd Improvements relating to telephones
US2200097A (en) * 1937-01-14 1940-05-07 Rca Corp Signal translating apparatus
US2325424A (en) * 1941-01-29 1943-07-27 Rca Corp Windshield for microphones
US2346394A (en) * 1941-06-21 1944-04-11 Rca Corp Sound pickup apparatus
US2433250A (en) * 1945-10-26 1947-12-23 Operadio Mfg Co Loud-speaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US588034A (en) * 1897-08-10 S peters co
US1901065A (en) * 1931-03-27 1933-03-14 Radio Keithorpheum Corp Microphone windshield
GB425186A (en) * 1933-11-24 1935-03-08 Alfred Graham & Co Ltd Improvements relating to telephones
US2200097A (en) * 1937-01-14 1940-05-07 Rca Corp Signal translating apparatus
US2325424A (en) * 1941-01-29 1943-07-27 Rca Corp Windshield for microphones
US2346394A (en) * 1941-06-21 1944-04-11 Rca Corp Sound pickup apparatus
US2433250A (en) * 1945-10-26 1947-12-23 Operadio Mfg Co Loud-speaker

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969417A (en) * 1957-05-01 1961-01-24 Birtcher Corp Adjustable electrical instruments
US3116376A (en) * 1962-03-28 1963-12-31 Maico Electronics Inc Acoustical device
US3585317A (en) * 1968-01-04 1971-06-15 Astatic Corp Cardioid microphone
US3642558A (en) * 1968-08-28 1972-02-15 Akustische Uber Kino Gerate Gm Decorative arrangement for microphone assemblies
US4057124A (en) * 1975-12-30 1977-11-08 Braden Harold C Sound suppressor
US4065648A (en) * 1976-10-12 1977-12-27 The Astatic Corporation Microphone screen
US4712429A (en) * 1985-07-16 1987-12-15 The United States Of America As Represented By The Secretary Of The Army Windscreen and two microphone configuration for blast noise detection
US5105394A (en) * 1988-07-29 1992-04-14 United States Of America As Represented By The Secretary Of The Navy Constrained diaphragm transducer
US4975966A (en) * 1989-08-24 1990-12-04 Bose Corporation Reducing microphone puff noise
US5127870A (en) * 1991-07-16 1992-07-07 You Hsing Plastics Co, Ltd. Echo-type toy megaphone
US5349140A (en) * 1992-08-07 1994-09-20 Valenzin Lawrence R Microphone windscreen
US5444790A (en) * 1994-02-28 1995-08-22 Shure Brothers, Inc. Microphone windscreen mounting
USD396862S (en) 1997-09-22 1998-08-11 Parris Morgan Microphone filter
USD415163S (en) * 1998-07-17 1999-10-12 Yoga Electonics Co., Ltd. Microphone
USD448364S1 (en) 2000-09-01 2001-09-25 Taky Electronics Co., Ltd. Microphone
USD457876S1 (en) 2000-09-01 2002-05-28 Taky Electronics Co., Ltd. Microphone
USD450684S1 (en) 2000-11-15 2001-11-20 Parris Morgan Microphone filter
US6935458B2 (en) 2001-09-25 2005-08-30 Thomas G. Owens Microphone shroud and related method of use
USD540786S1 (en) * 2004-06-11 2007-04-17 Dpa Microphones A/S Microphone holder and windcover
USD525238S1 (en) * 2005-01-18 2006-07-18 Stedman Corporation Pop screen filter assembly
USD551661S1 (en) * 2006-06-30 2007-09-25 Baltic Latvian Universal Electronics Microphone
USD586335S1 (en) * 2007-10-04 2009-02-10 Baltic Latvian Universal Electronics Snowflake microphone
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
USD729778S1 (en) * 2013-08-26 2015-05-19 Baltic Latvian Universal Electronics Llc Microphone
USD746796S1 (en) * 2014-12-29 2016-01-05 Gibson Brands, Inc. Microphone
USD747296S1 (en) * 2014-12-29 2016-01-12 Gibson Brands, Inc. Microphone
USD760204S1 (en) * 2015-01-05 2016-06-28 Gibson Brands, Inc. Microphone
USD760203S1 (en) * 2015-01-05 2016-06-28 Gibson Brands, Inc. Microphone
USD760704S1 (en) * 2015-01-05 2016-07-05 Gibson Brands, Inc. Microphone
USD864904S1 (en) * 2019-06-07 2019-10-29 Shenzhen Godo Cultural Originality Co., Ltd. Wireless loudspeaker
USD901459S1 (en) * 2020-07-15 2020-11-10 Yang Zhao Microphone pop filter
USD991229S1 (en) * 2021-09-22 2023-07-04 Shenzhen Lanque Shangpin Trading Co., Ltd. Microphone set
USD1056882S1 (en) * 2023-03-07 2025-01-07 Logitech Europe S.A. Microphone
USD1086100S1 (en) * 2023-03-07 2025-07-29 Logitech Europe S.A. Microphone
USD1081633S1 (en) * 2023-03-22 2025-07-01 Focusound Inc. Portable microphone isolation shield with pop filter

Also Published As

Publication number Publication date
GB625744A (en) 1949-07-04
FR957231A (enrdf_load_html_response) 1950-02-17
GB625743A (en) 1949-07-04
BE482467A (enrdf_load_html_response)
BE477840A (enrdf_load_html_response)
FR57883E (fr) 1953-09-18

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