US2427664A - Hearing guard and ear protector - Google Patents
Hearing guard and ear protector Download PDFInfo
- Publication number
- US2427664A US2427664A US616942A US61694245A US2427664A US 2427664 A US2427664 A US 2427664A US 616942 A US616942 A US 616942A US 61694245 A US61694245 A US 61694245A US 2427664 A US2427664 A US 2427664A
- Authority
- US
- United States
- Prior art keywords
- ear
- ear protector
- hearing
- mass
- guard
- 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
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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
- A61F11/08—Protective devices for the ears internal, e.g. earplugs
-
- 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
- A61F11/08—Protective devices for the ears internal, e.g. earplugs
- A61F11/085—Protective devices for the ears internal, e.g. earplugs including an inner channel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S220/00—Receptacles
- Y10S220/19—Rubber plugs and caps
Definitions
- An object of this invention is to provide an A small perforation or channel 3 is provided to ear plug capable of offering sufficient mass imextend through the mass designed to pass audible pedance to resist sudden pressure changes with quency and moderate intensity of peech and a minimum of exposed area and provided with being small enough to prevent high pressure or means for hearing conversation, and equalizing energy sounds from DaS gso doing the perair pressure in the outer ear canal.
- forated Plug acts to d p ds or noises of Details of the invention will become apparent hi frequency d l filter S u ds of high infrom a description of the following figures in n i y n pr ure. wh h; The filtering protection of the perforation or Fig.
- Fig. 1 is a cross section of a hearing guard and tube 3 is a function of e th and diameter of ear protector provided with a heavy mass imp pedgmce b
- Fig. 2 is a cross section of an ear protector of front of the drum membrane pamlm heavy mass in which the mass of the protector 1 and the tubular op ning i the P commilhiperforms t e required impedance function; cating therewith is considered as a resonator
- Fig. 3 shows the ear protector of Fig. 2 inserted a restricted neck as Shown in then, in the outer ear canal.
Description
Sept. 23, 1947. DUNBAR AL 2,427,664
HEARDIG GUARD AND EAR PROTECTOR Filed Sept. 17, 1945 Fig.
damn if Dunbar John S. Knight TAT E HEARING GUARD AND EAR PROTECTOR James Y. Dunbar and John S. Knight, United States Navy Application September 17, 1945, Serial No. 616,942
3 Claims. (Cl. 128151) (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) This invention pertains to improvements in tection when acted on by a force of pounds .per hearing guards and especially to a plug for prosquare inch. It has also been found that an tecting the inner ear and contiguous brain secincrease in weight of a lead plug from .005 pound tions from damage due to blast and shock waves, to .020 pound or an increase in weight by 4 times and from excessive sound levels. 5 will decrease the shock only about half. There- The use of hearing guards of rubber, composifore, the weight should be selected for wearing tion, wax, and cotton has long been customary comfort. in an effort to protect the ear mechanism, The Although lead is preferred as the impedance use of modern explosives has rendered these inmass, any heavy mass could be used without deadequate. Attempts have also been mad to filter lo parting from the scop of the invention. The out certain intense sounds and to seal the ears mass should be encased in a holder of rubber. against high pressures without satisfactory neoprene, or any other resilient material formed result. to fit into the outer ear canal. It should be pro- Present records and data show that damage vided with resilient sealing flange or flanges 4 to does not coincide with excess pressures or dural5 prevent irritation and provide a sn fi a tion of pressure alone. Injury in some cases is should preferably be provided with a tab 5 to pregreater even with the use of ear plugs as the rate vent too deep ear penetration as shown in Fig. 1. of pressure change is increased, even when low The mass may also be rubber mixed with a memaximum pressures are encountered. It, theretallic salt of the type shown in Fig. 2. In other fore, appears that damage is caused by the rate Words y relatively h h density t rial will of rise of pressure which is a shock function. sufiice.
An object of this invention is to provide an A small perforation or channel 3 is provided to ear plug capable of offering sufficient mass imextend through the mass designed to pass audible pedance to resist sudden pressure changes with quency and moderate intensity of peech and a minimum of exposed area and provided with being small enough to prevent high pressure or means for hearing conversation, and equalizing energy sounds from DaS gso doing the perair pressure in the outer ear canal. forated Plug acts to d p ds or noises of Details of the invention will become apparent hi frequency d l filter S u ds of high infrom a description of the following figures in n i y n pr ure. wh h; The filtering protection of the perforation or Fig. 1 is a cross section of a hearing guard and tube 3 is a function of e th and diameter of ear protector provided with a heavy mass imp pedgmce b If the air confined in the outer ear canal 6 in Fig. 2 is a cross section of an ear protector of front of the drum membrane pamlm heavy mass in which the mass of the protector 1 and the tubular op ning i the P commilhiperforms t e required impedance function; cating therewith is considered as a resonator with Fig. 3 shows the ear protector of Fig. 2 inserted a restricted neck as Shown in then, in the outer ear canal. Z
In Fig. 1 an ear protector l of any well known Natural frequency of the System fn= design is provided with a heavy mass impedance member 2, as shown. It will be noted that the M =inertence heavy mass inertia plug is perforated at 3 for a r purpose later described.
Without any protection the air in the external passage of the ear canal is compressed when acted on by a blast force resulting in acceleration of the ear drum. A heavy mass plug in the V C capacitance =density l=length of tube R=radius of tube outer ear offer impedance t0 V=chamberv01ume changes of pressure. The resistance offered by c=velocity of sound in air the mass to wave fronts of high intensity will Re R prevent injurious blast shock on the ear drum f,.= =K= and increase the efficiency of the ear protector. zl/Vl It has been found that a lead plug weighing in which K is a constant for all practical pur- .005 pound will accelerate approximately /iooo poses. as much as would the ear drum without pro- It i 61'flf016, ap nt th fr q n y Of he
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US616942A US2427664A (en) | 1945-09-17 | 1945-09-17 | Hearing guard and ear protector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US616942A US2427664A (en) | 1945-09-17 | 1945-09-17 | Hearing guard and ear protector |
Publications (1)
Publication Number | Publication Date |
---|---|
US2427664A true US2427664A (en) | 1947-09-23 |
Family
ID=24471629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US616942A Expired - Lifetime US2427664A (en) | 1945-09-17 | 1945-09-17 | Hearing guard and ear protector |
Country Status (1)
Country | Link |
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US (1) | US2427664A (en) |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2458884A (en) * | 1946-01-03 | 1949-01-11 | Volkmann John | Ear protector valve |
US2573923A (en) * | 1950-04-07 | 1951-11-06 | Mezz David | Ear protector |
US2670738A (en) * | 1952-03-14 | 1954-03-02 | Gibbons Thomas | Ear protector |
US2717596A (en) * | 1954-04-26 | 1955-09-13 | John S Knight | Cushion mounting for mass impedance resonance filter |
US3831398A (en) * | 1972-04-04 | 1974-08-27 | J Davis | Ornament with securing means |
US4034759A (en) * | 1975-08-27 | 1977-07-12 | Xomed, Inc. | Moisture-expandable prosthesis |
US4326512A (en) * | 1980-02-14 | 1982-04-27 | Peerless Sidney A | Composite ventilation tube for the middle ear |
US4353364A (en) * | 1979-01-18 | 1982-10-12 | Woods Thomas J | Ear acoustical attenuating device |
EP0092362A2 (en) * | 1982-04-19 | 1983-10-26 | Clayton H. Allen | Nonlinear passive acoustic filtering |
DE3605597A1 (en) * | 1985-03-29 | 1986-10-02 | Cabot Corp., Boston, Mass. | EAR PLUG |
US4867149A (en) * | 1985-03-29 | 1989-09-19 | Cabot Corporation | Earplugs |
US4975967A (en) * | 1988-05-24 | 1990-12-04 | Rasmussen Steen B | Earplug for noise protected communication between the user of the earplug and surroundings |
US5467784A (en) * | 1994-08-16 | 1995-11-21 | Mobley; J. Phil | Pressure-regulating ear plug |
WO1997018779A1 (en) * | 1995-11-20 | 1997-05-29 | House Ear Institute | Pressure-regulating ear plug |
US5775336A (en) * | 1996-05-31 | 1998-07-07 | Georgetown University | Tubular medical device |
US5819745A (en) * | 1994-08-16 | 1998-10-13 | House Ear Institute | Pressure-regulating ear plug |
USD434139S (en) * | 1999-09-17 | 2000-11-21 | 3M Innovative Properties Company | Earplug |
USD435645S (en) * | 1999-08-11 | 2000-12-26 | Roland Westerdal | Ear plug |
US6568394B2 (en) | 2000-10-13 | 2003-05-27 | Cabot Safety Intermediate Corporation | Flanged earplug |
US20040069310A1 (en) * | 2001-10-16 | 2004-04-15 | Falco Robert N. | Flanged earplug |
US20070023442A1 (en) * | 2005-08-01 | 2007-02-01 | Auzenne Gerald K | Beverage Container Stopper Systems |
US20070125590A1 (en) * | 2005-12-07 | 2007-06-07 | Phonak Ag | Hearing protection device with acoustic filter element and method for manufacturing the same |
US20080028695A1 (en) * | 2006-08-04 | 2008-02-07 | Octagon Enterprises, Llc | Plug for waterproofing and method for using same |
US20080028696A1 (en) * | 2006-08-04 | 2008-02-07 | Octagon Enterprises, Llc | Plug and plate for waterproofing and method for using same |
WO2011061451A1 (en) * | 2009-11-20 | 2011-05-26 | Sport Controle | Device for protecting an ear |
US20150059775A1 (en) * | 2013-09-04 | 2015-03-05 | Hung-Wen Hung | Earplug |
US9198800B2 (en) | 2009-10-30 | 2015-12-01 | Etymotic Research, Inc. | Electronic earplug for providing communication and protection |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US302738A (en) * | 1884-07-29 | Ear-guard | ||
US1016877A (en) * | 1911-01-18 | 1912-02-06 | James A R Elliott | Ear-protector. |
US2053995A (en) * | 1934-01-16 | 1936-09-08 | Leo M Hoey | Ear plug |
US2246737A (en) * | 1939-08-07 | 1941-06-24 | Vern O Knudsen | Ear stopper |
-
1945
- 1945-09-17 US US616942A patent/US2427664A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US302738A (en) * | 1884-07-29 | Ear-guard | ||
US1016877A (en) * | 1911-01-18 | 1912-02-06 | James A R Elliott | Ear-protector. |
US2053995A (en) * | 1934-01-16 | 1936-09-08 | Leo M Hoey | Ear plug |
US2246737A (en) * | 1939-08-07 | 1941-06-24 | Vern O Knudsen | Ear stopper |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2458884A (en) * | 1946-01-03 | 1949-01-11 | Volkmann John | Ear protector valve |
US2573923A (en) * | 1950-04-07 | 1951-11-06 | Mezz David | Ear protector |
US2670738A (en) * | 1952-03-14 | 1954-03-02 | Gibbons Thomas | Ear protector |
US2717596A (en) * | 1954-04-26 | 1955-09-13 | John S Knight | Cushion mounting for mass impedance resonance filter |
US3831398A (en) * | 1972-04-04 | 1974-08-27 | J Davis | Ornament with securing means |
US4034759A (en) * | 1975-08-27 | 1977-07-12 | Xomed, Inc. | Moisture-expandable prosthesis |
US4353364A (en) * | 1979-01-18 | 1982-10-12 | Woods Thomas J | Ear acoustical attenuating device |
US4326512A (en) * | 1980-02-14 | 1982-04-27 | Peerless Sidney A | Composite ventilation tube for the middle ear |
EP0092362A2 (en) * | 1982-04-19 | 1983-10-26 | Clayton H. Allen | Nonlinear passive acoustic filtering |
EP0092362A3 (en) * | 1982-04-19 | 1985-11-21 | Clayton H. Allen | Nonlinear passive acoustic filtering |
DE3605597A1 (en) * | 1985-03-29 | 1986-10-02 | Cabot Corp., Boston, Mass. | EAR PLUG |
FR2579456A1 (en) * | 1985-03-29 | 1986-10-03 | Cabot Corp | GUARD TYMPAN |
US4867149A (en) * | 1985-03-29 | 1989-09-19 | Cabot Corporation | Earplugs |
AT389636B (en) * | 1985-03-29 | 1990-01-10 | Cabot Corp | EAR PLUG |
US4975967A (en) * | 1988-05-24 | 1990-12-04 | Rasmussen Steen B | Earplug for noise protected communication between the user of the earplug and surroundings |
US5467784A (en) * | 1994-08-16 | 1995-11-21 | Mobley; J. Phil | Pressure-regulating ear plug |
WO1997009011A1 (en) * | 1994-08-16 | 1997-03-13 | House Ear Institute | Pressure-regulating ear plug |
US5819745A (en) * | 1994-08-16 | 1998-10-13 | House Ear Institute | Pressure-regulating ear plug |
WO1997018779A1 (en) * | 1995-11-20 | 1997-05-29 | House Ear Institute | Pressure-regulating ear plug |
AU713512B2 (en) * | 1995-11-20 | 1999-12-02 | House Ear Institute | Pressure-regulating ear plug |
US5775336A (en) * | 1996-05-31 | 1998-07-07 | Georgetown University | Tubular medical device |
USD435645S (en) * | 1999-08-11 | 2000-12-26 | Roland Westerdal | Ear plug |
USD434139S (en) * | 1999-09-17 | 2000-11-21 | 3M Innovative Properties Company | Earplug |
US6568394B2 (en) | 2000-10-13 | 2003-05-27 | Cabot Safety Intermediate Corporation | Flanged earplug |
US8297287B2 (en) * | 2001-10-16 | 2012-10-30 | 3M Innovative Properties Company | Flanged earplug |
US20040069310A1 (en) * | 2001-10-16 | 2004-04-15 | Falco Robert N. | Flanged earplug |
US20070023442A1 (en) * | 2005-08-01 | 2007-02-01 | Auzenne Gerald K | Beverage Container Stopper Systems |
US8733584B2 (en) * | 2005-08-01 | 2014-05-27 | Gerald Keith Auzenne | Beverage container stopper systems |
US20070125590A1 (en) * | 2005-12-07 | 2007-06-07 | Phonak Ag | Hearing protection device with acoustic filter element and method for manufacturing the same |
US20080028695A1 (en) * | 2006-08-04 | 2008-02-07 | Octagon Enterprises, Llc | Plug for waterproofing and method for using same |
US20080028696A1 (en) * | 2006-08-04 | 2008-02-07 | Octagon Enterprises, Llc | Plug and plate for waterproofing and method for using same |
US8820013B2 (en) | 2006-08-04 | 2014-09-02 | Mid-Atlantic Waterproofing Of Md, Inc. | Plug and plate for waterproofing and method for using same |
US9198800B2 (en) | 2009-10-30 | 2015-12-01 | Etymotic Research, Inc. | Electronic earplug for providing communication and protection |
FR2952811A1 (en) * | 2009-11-20 | 2011-05-27 | Sport Controle | DEVICE FOR PROTECTING AN EAR |
WO2011061451A1 (en) * | 2009-11-20 | 2011-05-26 | Sport Controle | Device for protecting an ear |
US20150059775A1 (en) * | 2013-09-04 | 2015-03-05 | Hung-Wen Hung | Earplug |
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