GB1160431A - Ear Defenders. - Google Patents

Ear Defenders.

Info

Publication number
GB1160431A
GB1160431A GB19684/66A GB1968466A GB1160431A GB 1160431 A GB1160431 A GB 1160431A GB 19684/66 A GB19684/66 A GB 19684/66A GB 1968466 A GB1968466 A GB 1968466A GB 1160431 A GB1160431 A GB 1160431A
Authority
GB
United Kingdom
Prior art keywords
ear
shell
region
amplifier
defender
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
GB19684/66A
Inventor
Peter John Barker
Roy Anthony Livermore
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.)
MINI OF TECHNOLOGY LONDON
Original Assignee
MINI OF TECHNOLOGY LONDON
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 MINI OF TECHNOLOGY LONDON filed Critical MINI OF TECHNOLOGY LONDON
Priority to GB19684/66A priority Critical patent/GB1160431A/en
Publication of GB1160431A publication Critical patent/GB1160431A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
    • A61F11/145—Protective devices for the ears external, e.g. earcaps or earmuffs electric, e.g. for active noise reduction

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Acoustics & Sound (AREA)
  • Biophysics (AREA)
  • Otolaryngology (AREA)
  • Psychology (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Headphones And Earphones (AREA)

Abstract

1,160,431. Ear defenders. MINISTER OF TECHNOLOGY. 18 July, 1967 [4 May, 1966] No. 19684/66. Heading H4J. A cover type ear defender has a shell 12 and an annular seating 11 for sealing around the outer ear. A microphone 17 is mounted externally on the shell 12 and is connected through an amplifier 18 to an earphone 14 within the shell 1.2. The amplifier 18 is arranged to have a limiting characteristic whereby sounds of intensity up to the region of 90 dB. above 0À0002 dynes/cm.2 are transmitted with a linear response, but above that region are limited to a safe peak level. The region of linear response preferably has an overall acoustic gain of unity. In general one defender for each ear is supported on a sprung type head band. The seating 11 is liquid filled. A resilient earphone mounting 13 is provided, together with plastics foam filling 15. A rear enclosure 16 has an aperture for a battery lead 19 and a pressure balancing hole 20. Bandwidth may be restricted to discriminate against sounds of particular frequency content.
GB19684/66A 1966-05-04 1966-05-04 Ear Defenders. Expired GB1160431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB19684/66A GB1160431A (en) 1966-05-04 1966-05-04 Ear Defenders.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19684/66A GB1160431A (en) 1966-05-04 1966-05-04 Ear Defenders.

Publications (1)

Publication Number Publication Date
GB1160431A true GB1160431A (en) 1969-08-06

Family

ID=10133466

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19684/66A Expired GB1160431A (en) 1966-05-04 1966-05-04 Ear Defenders.

Country Status (1)

Country Link
GB (1) GB1160431A (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5113202A (en) * 1974-06-12 1976-02-02 Akg Akustische Kino Geraete
WO1987004065A1 (en) * 1986-01-03 1987-07-16 Trompler Lyle D Noise limiting circuit for earmuffs
US4928311A (en) * 1986-01-03 1990-05-22 Trompler Lyle D Noise limiting circuit for earmuffs
US5673325A (en) * 1992-10-29 1997-09-30 Andrea Electronics Corporation Noise cancellation apparatus
US5715321A (en) * 1992-10-29 1998-02-03 Andrea Electronics Coporation Noise cancellation headset for use with stand or worn on ear
US6061456A (en) 1992-10-29 2000-05-09 Andrea Electronics Corporation Noise cancellation apparatus
US6363345B1 (en) 1999-02-18 2002-03-26 Andrea Electronics Corporation System, method and apparatus for cancelling noise
US6594367B1 (en) 1999-10-25 2003-07-15 Andrea Electronics Corporation Super directional beamforming design and implementation
WO2005051255A1 (en) * 2003-11-27 2005-06-09 Peltor Ab Hearing protector
WO2006058319A1 (en) * 2004-11-29 2006-06-01 Cabot Safety Intermediate Corporation Hearing protector
EP1675429A2 (en) * 2004-12-22 2006-06-28 Sung Kyun Park Headset for blocking noise
US8130970B2 (en) 2005-04-29 2012-03-06 3M Innovative Properties Company Ear cup
US8130985B2 (en) 2006-06-20 2012-03-06 3M Innovative Properties Company Ear cup with bone conduction microphone
US8189801B2 (en) 2005-04-29 2012-05-29 3M Svenska Aktiebolag Ear cup
US8224011B2 (en) 2005-04-29 2012-07-17 3M Innovative Properties Company Ear cup with microphone device
US8995676B2 (en) 2008-03-26 2015-03-31 3M Svenska Ab Hearing protector
US9131310B2 (en) 2008-05-12 2015-09-08 3M Innovative Properties Company Hearing protector
US20160080853A1 (en) * 2014-09-17 2016-03-17 Wei-Hsiang Chen Modular headphone system

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5113202A (en) * 1974-06-12 1976-02-02 Akg Akustische Kino Geraete
JPS5342401B2 (en) * 1974-06-12 1978-11-11
JPS55168289U (en) * 1974-06-12 1980-12-03
US4928311A (en) * 1986-01-03 1990-05-22 Trompler Lyle D Noise limiting circuit for earmuffs
WO1987004065A1 (en) * 1986-01-03 1987-07-16 Trompler Lyle D Noise limiting circuit for earmuffs
US5673325A (en) * 1992-10-29 1997-09-30 Andrea Electronics Corporation Noise cancellation apparatus
US5715321A (en) * 1992-10-29 1998-02-03 Andrea Electronics Coporation Noise cancellation headset for use with stand or worn on ear
US6061456A (en) 1992-10-29 2000-05-09 Andrea Electronics Corporation Noise cancellation apparatus
US6363345B1 (en) 1999-02-18 2002-03-26 Andrea Electronics Corporation System, method and apparatus for cancelling noise
US6594367B1 (en) 1999-10-25 2003-07-15 Andrea Electronics Corporation Super directional beamforming design and implementation
AU2004292926C1 (en) * 2003-11-27 2012-07-19 3M Innovative Properties Company Hearing protector
WO2005051255A1 (en) * 2003-11-27 2005-06-09 Peltor Ab Hearing protector
US8243943B2 (en) 2003-11-27 2012-08-14 3M Svenska Aktiebolag Hearing protector with removable microphone, amplifier, and loudspeaker unit
AU2004292926B2 (en) * 2003-11-27 2011-11-03 3M Innovative Properties Company Hearing protector
WO2006058319A1 (en) * 2004-11-29 2006-06-01 Cabot Safety Intermediate Corporation Hearing protector
AU2005309381B2 (en) * 2004-11-29 2011-08-18 3M Innovative Properties Company Hearing protector
EP1675429A2 (en) * 2004-12-22 2006-06-28 Sung Kyun Park Headset for blocking noise
EP1675429A3 (en) * 2004-12-22 2008-05-07 Comtech, Inc. Headset for blocking noise
US8189801B2 (en) 2005-04-29 2012-05-29 3M Svenska Aktiebolag Ear cup
US8224011B2 (en) 2005-04-29 2012-07-17 3M Innovative Properties Company Ear cup with microphone device
US8130970B2 (en) 2005-04-29 2012-03-06 3M Innovative Properties Company Ear cup
US8130985B2 (en) 2006-06-20 2012-03-06 3M Innovative Properties Company Ear cup with bone conduction microphone
US8995676B2 (en) 2008-03-26 2015-03-31 3M Svenska Ab Hearing protector
US9131310B2 (en) 2008-05-12 2015-09-08 3M Innovative Properties Company Hearing protector
US20160080853A1 (en) * 2014-09-17 2016-03-17 Wei-Hsiang Chen Modular headphone system
US9467767B2 (en) * 2014-09-17 2016-10-11 Wei-Hsiang Chen Modular headphone system

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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