WO2021150135A1 - Ear plug - Google Patents

Ear plug Download PDF

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Publication number
WO2021150135A1
WO2021150135A1 PCT/RU2020/000630 RU2020000630W WO2021150135A1 WO 2021150135 A1 WO2021150135 A1 WO 2021150135A1 RU 2020000630 W RU2020000630 W RU 2020000630W WO 2021150135 A1 WO2021150135 A1 WO 2021150135A1
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WO
WIPO (PCT)
Prior art keywords
noise attenuation
channel
symmetry
attenuation level
axis
Prior art date
Application number
PCT/RU2020/000630
Other languages
French (fr)
Russian (ru)
Inventor
Андрей Владимирович РЕМЯННИКОВ
Original Assignee
Общество с ограниченной ответственностью "Ривер"
Андрей Владимирович РЕМЯННИКОВ
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Publication of WO2021150135A1 publication Critical patent/WO2021150135A1/en

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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
    • 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
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016—Earpieces of the intra-aural type

Definitions

  • the invention relates to a means for protecting the ear canals from noise, water ingress and foreign objects, providing the ability to control the level of noise attenuation.
  • Known earplugs including a housing with a through channel and a noise attenuation level regulator with a through hole (EP 0955025, WO 1999036016, US 6082485, US 8820470).
  • the technical result from the use of the invention is to provide the possibility of a smoother adjustment of the noise attenuation level.
  • the specified technical result is achieved by the fact that in earplugs containing a body in the form of a solid body with a through channel and a noise attenuation level regulator in the form of a solid body with a through hole connected to the body with the possibility of changing the cross-sectional area of the part of the through channel not covered by the attenuation level regulator noise, when the position of the noise attenuation level regulator changes relative to the housing, the housing and the noise attenuation level regulator are made in a form that allows monotonic, in particular strictly monotonic, changes in the specified area when the through hole moves along a trajectory whose length exceeds the largest linear size of this area or at least half of it.
  • the specified technical result is achieved by the fact that the body is made in the form of a circular cylinder with a through channel enveloping its axis of symmetry, the cross-sectional area of which by a plane passing through the axis of symmetry of the circular cylinder changes monotonically, in particular strictly monotonically, changes when this plane rotates around the axis symmetry of a circular cylinder, and the noise attenuation level control is in the form of a disk that can rotate around the axis of symmetry of a circular cylinder.
  • the through channel can have the configuration of a first cylindrical surface, passing into a second cylindrical or other rounded surface with a smaller section.
  • the first cylindrical surface of the through channel may be formed by circular cylindrical surfaces with parallel axes of symmetry.
  • the first cylindrical surface can be formed by surfaces with radii Ri, R2 and R3, R I > R2, Ri> R3 -
  • R3 ⁇ Ro where Ro is the radius of the through hole in the noise attenuation level regulator, and the surface with radius R2 touches the surface with radius Ri from the inside.
  • the axis of symmetry of the second cylindrical surface may or may not be parallel to the axis of symmetry of the first cylindrical surface.
  • a confuser can be used, the outlet of which is mated with the through hole of the noise attenuation level regulator.
  • FIG. 1 shows the components of the proposed earplugs in the order of their arrangement during installation
  • FIG. 2 a, b - the proposed earplugs assembled with ear pads in the form of a silicone insert and made of foamed polymer
  • Fig. 3 is an isometric view of the body
  • the earplugs contain a housing 1 with a through channel 2, a noise attenuation level regulator 3 with a through hole 4, a locking ring 5, a seal 6, a confuser 7 with a through channel 8, a protective mesh 9, and ear cushions 10.
  • the ear cushion 10 is fixed on the body 1.
  • the movable connection of the regulator 3 with the body 1 with the possibility of rotation of the regulator 3 relative to the body 1 is provided with the help of the locking ring 5 (see, for example, V.I. ed. IN Zhestkova. - M .: Mashinostroenie, 2001, pp. 775-777) or by choosing the ratio of the diameters of the through channel 2 and the regulator 3, at which the regulator 3, being held in the through channel 2 by friction forces, retains the possibility of rotation.
  • Earplugs are inserted into the ear with an ear pad 10.
  • the noise passes through the protective mesh 9, which somewhat reduces its level and protects the earplugs from clogging. Further, the noise passes through the confuser 7 and enters the through hole 4 of the regulator 3, and then into the through channel 2 in the housing 1 and then through the ear cushions 10 enters the ear.
  • the cross-sectional area of the part of the through channel 2 not covered by the regulator 3 changes.
  • the noise level passing through the earplugs can smoothly change from the highest value (when the position of the through hole 4 with the entrance to the through channel 2) to zero (if the position of the through hole 4 does not coincide with the entrance to the through channel 2).
  • a means may be provided to restrict rotation of the regulator 3, which does not allow the through hole 4 to go beyond the through channel 2.
  • Confuser 7 is designed to amplify the noise entering the ear canal, which, if necessary, allows for sufficient audibility without removing the taker from the ears.
  • a seal 6 with holes for the unimpeded passage of noise ensures the tightness of the joint of the regulator 3 with the housing 1 and damping of vibrations arising from the effect of noise.
  • the ear cushion 10 with a central canal designed for a snug fit into the ear canal, can be made in the form of a silicone insert corresponding to the shape of the inlet part of the ear canal, or a foam polymer that takes the shape of an ear canal when inserted into it with an ear plug and "memorizes" this shape ...

Abstract

The invention relates to means for protecting the ear canal against noise and the intrusion of water and foreign bodies, and which allow adjustment of the level of noise attenuation. The technical result of the invention consists in allowing smoother adjustment of the level of noise attenuation. The present ear plug comprises a body (1) having a through channel (2), a noise attenuation level adjuster (3) having a through opening (4), a spring-loaded half-ring (5), a seal (6), a convergent member (7) having a through channel (8), a protective mesh (9), and a tip (10).

Description

Беруши Earplugs
Изобретение относится к средствам для защиты слуховых проходов от шума, попадания воды и посторонних предметов, обеспечивающим возможность регулирования уровня затухания шума. The invention relates to a means for protecting the ear canals from noise, water ingress and foreign objects, providing the ability to control the level of noise attenuation.
Известны беруши, включающие корпус со сквозным каналом и регулятор уровня затухания шума со сквозным отверстием (ЕР 0955025, WO 1999036016, US 6082485, US 8820470). Known earplugs, including a housing with a through channel and a noise attenuation level regulator with a through hole (EP 0955025, WO 1999036016, US 6082485, US 8820470).
Известные беруши имеют короткий ход регулирования, ввиду чего регулировка уровня затухания шума оказывается недостаточно плавной. Known earplugs have a short control stroke, which makes the noise attenuation level control not smooth enough.
Технический результат от использования изобретения заключается в обеспечении возможности более плавной регулировки уровня затухания шума. The technical result from the use of the invention is to provide the possibility of a smoother adjustment of the noise attenuation level.
Указанный технический результат достигается тем, что в берушах, содержащих корпус в виде твердого тела со сквозным каналом и регулятор уровня затухания шума в виде твердого тела со сквозным отверстием, связанный с корпусом с возможностью изменения площади поперечного сечения части сквозного канала, не перекрытой регулятором уровня затухания шума, при изменении положения регулятора уровня затухания шума относительно корпуса, корпус и регулятор уровня затухания шума выполнены в виде, обеспечивающем возможность монотонного, в частности строго монотонного, изменения указанной площади при перемещении сквозного отверстия по траектории, длина которой превышает наибольший линейный размер этой площади или, по меньшей мере, его половину. The specified technical result is achieved by the fact that in earplugs containing a body in the form of a solid body with a through channel and a noise attenuation level regulator in the form of a solid body with a through hole connected to the body with the possibility of changing the cross-sectional area of the part of the through channel not covered by the attenuation level regulator noise, when the position of the noise attenuation level regulator changes relative to the housing, the housing and the noise attenuation level regulator are made in a form that allows monotonic, in particular strictly monotonic, changes in the specified area when the through hole moves along a trajectory whose length exceeds the largest linear size of this area or at least half of it.
В частности, указанный технический результат достигается тем, что корпус выполнен в виде круглого цилиндра с огибающим его ось симметрии сквозным каналом, площадь сечения которого плоскостью, проходящей через ось симметрии круглого цилиндра, монотонно, в частности строго монотонно, изменяется при вращении этой плоскости вокруг оси симметрии круглого цилиндра, а регулятор уровня затухания шума - в виде диска, имеющего возможность вращения вокруг оси симметрии круглого цилиндра. In particular, the specified technical result is achieved by the fact that the body is made in the form of a circular cylinder with a through channel enveloping its axis of symmetry, the cross-sectional area of which by a plane passing through the axis of symmetry of the circular cylinder changes monotonically, in particular strictly monotonically, changes when this plane rotates around the axis symmetry of a circular cylinder, and the noise attenuation level control is in the form of a disk that can rotate around the axis of symmetry of a circular cylinder.
Сквозной канал может иметь конфигурацию первой цилиндрической поверхности, переходящей во вторую цилиндрическую или иную округлую поверхность с меньшим сечением. The through channel can have the configuration of a first cylindrical surface, passing into a second cylindrical or other rounded surface with a smaller section.
Первая цилиндрическая поверхность сквозного канала может быть образована круглыми цилиндрическими поверхностями с параллельными осями симметрии. Первая цилиндрическая поверхность может быть образована поверхностями с радиусами Ri, R2 и R3, RI>R2, Ri>R3- Предпочтителен вариант, при котором R3<Ro, где Ro - радиус сквозного отверстия в регуляторе уровня затухания шума, а поверхность с радиусом R2 касается поверхности с радиусом Ri изнутри. The first cylindrical surface of the through channel may be formed by circular cylindrical surfaces with parallel axes of symmetry. The first cylindrical surface can be formed by surfaces with radii Ri, R2 and R3, R I > R2, Ri> R3 - The preferred option is where R3 <Ro, where Ro is the radius of the through hole in the noise attenuation level regulator, and the surface with radius R2 touches the surface with radius Ri from the inside.
Ось симметрии второй цилиндрической поверхности может быть параллельна или не параллельна оси симметрии первой цилиндрической поверхности. The axis of symmetry of the second cylindrical surface may or may not be parallel to the axis of symmetry of the first cylindrical surface.
Может быть использован конфузор, выходное отверстие которого сопряжено со сквозным отверстием регулятора уровня затухания шума. A confuser can be used, the outlet of which is mated with the through hole of the noise attenuation level regulator.
На фиг. 1 изображены составляющие предлагаемых берушей в порядке их расположения при монтаже, на фиг. 2 а, б - предлагаемые беруши в сборе с амбушюрами в виде силиконовой вставки и из вспененного полимера, на фиг. 3 - корпус в изометрии, на фиг. 4 а, б - корпуса с различными конфигурациями поверхностей сквозного канала. FIG. 1 shows the components of the proposed earplugs in the order of their arrangement during installation, FIG. 2 a, b - the proposed earplugs assembled with ear pads in the form of a silicone insert and made of foamed polymer, in Fig. 3 is an isometric view of the body, FIG. 4 a, b - bodies with different configurations of the surfaces of the through channel.
Беруши содержат корпус 1 со сквозным каналом 2, регулятор 3 уровня затухания шума со сквозным отверстием 4, запорное кольцо 5, уплотнитель 6, конфузор 7 со сквозным каналом 8, защитную сетку 9, амбушюр 10. The earplugs contain a housing 1 with a through channel 2, a noise attenuation level regulator 3 with a through hole 4, a locking ring 5, a seal 6, a confuser 7 with a through channel 8, a protective mesh 9, and ear cushions 10.
Регулятор 3, конфузор 7, выходное отверстие которого сопряжено со сквозным отверстием регулятора 3, и защитная сетка 9 скреплены между собой. Амбушюр 10 закреплен на корпусе 1. Подвижное соединение регулятора 3 с корпусом 1 с возможностью вращения регулятора 3 относительно корпуса 1 , обеспечивается с помощью запорного кольца 5 (см., например, Анурьев В.И. Справочник конструктора- машиностроителя: Т. 1. Под ред. И.Н. Жестковой. - М.: Машиностроение, 2001, сс. 775- 777) или выбором соотношения диаметров сквозного канала 2 и регулятора 3, при котором регулятор 3, удерживаясь в сквозном канале 2 силами трения, сохраняет возможность вращения. Regulator 3, confuser 7, the outlet of which is mated with the through hole of the regulator 3, and the protective mesh 9 are fastened together. The ear cushion 10 is fixed on the body 1. The movable connection of the regulator 3 with the body 1 with the possibility of rotation of the regulator 3 relative to the body 1 is provided with the help of the locking ring 5 (see, for example, V.I. ed. IN Zhestkova. - M .: Mashinostroenie, 2001, pp. 775-777) or by choosing the ratio of the diameters of the through channel 2 and the regulator 3, at which the regulator 3, being held in the through channel 2 by friction forces, retains the possibility of rotation.
Беруши вставляют в ухо амбушюром 10. Шум проходит через защитную сетку 9, несколько снижающую его уровень и защищающую беруши от засорения. Далее шум проходит через конфузор 7 и попадает в сквозное отверстие 4 регулятора 3, а затем в сквозной канал 2 в корпусе 1 и далее через амбушюр 10 проникает в ухо. Earplugs are inserted into the ear with an ear pad 10. The noise passes through the protective mesh 9, which somewhat reduces its level and protects the earplugs from clogging. Further, the noise passes through the confuser 7 and enters the through hole 4 of the regulator 3, and then into the through channel 2 in the housing 1 and then through the ear cushions 10 enters the ear.
При вращении регулятора 3 происходит изменение площади поперечного сечения части сквозного канала 2, не перекрытой регулятором 3. В зависимости от положения сквозного отверстия 4 относительно сквозного канала 2 уровень шума, проходящего через беруши, может плавно изменяться от наибольшей величины (при полном совпадении положения сквозного отверстия 4 со входом в сквозной канал 2) до нулевой (при несовпадении положения сквозного отверстия 4 со входом в сквозной канал 2). Для удобства пользования берушами может быть предусмотрено средство для ограничения вращения регулятора 3, не дающее возможности выхода сквозного отверстия 4 за пределы сквозного канала 2. When the regulator 3 rotates, the cross-sectional area of the part of the through channel 2 not covered by the regulator 3 changes. Depending on the position of the through hole 4 relative to the through channel 2, the noise level passing through the earplugs can smoothly change from the highest value (when the position of the through hole 4 with the entrance to the through channel 2) to zero (if the position of the through hole 4 does not coincide with the entrance to the through channel 2). For the convenience of using earplugs, a means may be provided to restrict rotation of the regulator 3, which does not allow the through hole 4 to go beyond the through channel 2.
Плавность регулировки обеспечивается предложенным выбором соотношения конфигураций и размеров сквозного канала 2 и сквозного отверстия 4, при которых скорость изменения объема пространства, через которое проходит шум, при вращении регулятора 3 оказывается меньшей, чем в известных берушах. Smoothness of adjustment is ensured by the proposed choice of the ratio of the configurations and dimensions of the through channel 2 and through hole 4, at which the rate of change in the volume of the space through which the noise passes, when the regulator 3 is rotated, turns out to be lower than in known earplugs.
Конфузор 7 предназначен для усиления шума, поступающего в ушной канал, что при необходимости позволяет обеспечить достаточную слышимость без выемки берущей из ушей. Уплотнитель 6 с отверстиями для беспрепятственного прохождения шума обеспечивает герметичность сочленения регулятора 3 с корпусом 1 и демпфирование вибраций, возникающих под действием шума. Амбушюр 10 с центральным каналом, предназначенный для плотной посадки берущей в ушной канал, может быть выполнен в виде силиконовой вставки, соответствующей по форме входной части ушного канала, или вспененного полимера, приобретающего форму ушного канала при вставлении в него берушей и «запоминающего» эту форму. Confuser 7 is designed to amplify the noise entering the ear canal, which, if necessary, allows for sufficient audibility without removing the taker from the ears. A seal 6 with holes for the unimpeded passage of noise ensures the tightness of the joint of the regulator 3 with the housing 1 and damping of vibrations arising from the effect of noise. The ear cushion 10 with a central canal, designed for a snug fit into the ear canal, can be made in the form of a silicone insert corresponding to the shape of the inlet part of the ear canal, or a foam polymer that takes the shape of an ear canal when inserted into it with an ear plug and "memorizes" this shape ...

Claims

Формула изобретения Claim
1. Беруши, содержащие корпус в виде твердого тела со сквозным каналом и регулятор уровня затухания шума в виде твердого тела со сквозным отверстием, связанный с корпусом с возможностью изменения площади поперечного сечения части сквозного канала, не перекрытой регулятором уровня затухания шума, при изменении положения регулятора уровня затухания шума относительно корпуса, отличающиеся тем, что корпус и регулятор уровня затухания шума выполнены в виде, обеспечивающем возможность монотонного, в частности строго монотонного, изменения указанной площади при перемещении сквозного отверстия по траектории, длина которой превышает наибольший линейный размер этой площади или, по меньшей мере, его половину. 1. Earplugs containing a body in the form of a solid body with a through channel and a noise attenuation level regulator in the form of a solid body with a through hole connected to the body with the possibility of changing the cross-sectional area of the part of the through channel not covered by the noise attenuation level regulator when the position of the regulator is changed noise attenuation level relative to the housing, characterized in that the housing and the noise attenuation level regulator are made in a form that provides the possibility of monotonic, in particular strictly monotonic, changes in the specified area when the through hole moves along a trajectory whose length exceeds the largest linear size of this area or, along at least half of it.
2. Беруши по п. 1, отличающиеся тем, что корпус выполнен в виде круглого цилиндра с огибающим его ось симметрии сквозным каналом, площадь сечения которого плоскостью, проходящей через ось симметрии круглого цилиндра, монотонно, в частности строго монотонно, изменяется при вращении этой плоскости вокруг оси симметрии круглого цилиндра, а регулятор уровня затухания шума - в виде диска, имеющего возможность вращения вокруг оси симметрии круглого цилиндра. 2. Earplugs according to claim 1, characterized in that the body is made in the form of a circular cylinder with a through channel enveloping its axis of symmetry, the cross-sectional area of which by a plane passing through the axis of symmetry of the circular cylinder changes monotonically, in particular strictly monotonously, changes when this plane rotates around the axis of symmetry of a circular cylinder, and the noise attenuation level control is in the form of a disk that can rotate around the axis of symmetry of a circular cylinder.
3. Беруши по пп. 1 или 2, отличающиеся тем, что сквозной канал имеет конфигурацию первой цилиндрической поверхности, переходящей во вторую цилиндрическую или иную округлую поверхность с меньшим сечением. 3. Earplugs according to PP. 1 or 2, characterized in that the through channel has the configuration of a first cylindrical surface passing into a second cylindrical or other rounded surface with a smaller section.
4. Беруши по п. 3, отличающиеся тем, что первая цилиндрическая поверхность сквозного канала образована круглыми цилиндрическими поверхностями с параллельными осями симметрии. 4. Earplugs according to claim 3, characterized in that the first cylindrical surface of the through channel is formed by circular cylindrical surfaces with parallel axes of symmetry.
5. Беруши по п. 4, отличающиеся тем, что первая цилиндрическая поверхность образована поверхностями с радиусами Ri, R2 и R3, RI>R2, Ri>R3. 5. Earplugs according to claim 4, characterized in that the first cylindrical surface is formed by surfaces with radii Ri, R2 and R3, RI> R2, Ri> R3.
6. Беруши по п. 5, отличающиеся тем, что R3<Ro, где Ro - радиус сквозного отверстия в регуляторе уровня затухания шума. 6. Earplugs according to claim 5, characterized in that R3 <Ro, where Ro is the radius of the through hole in the noise attenuation level regulator.
7. Беруши по п. 6, отличающиеся тем, что поверхность с радиусом R2 касается поверхности с радиусом Ri изнутри. 7. Earplugs according to claim 6, characterized in that the surface with radius R2 touches the surface with radius Ri from the inside.
8. Беруши по п. 3, отличающиеся тем, что ось симметрии второй цилиндрической поверхности параллельна или не параллельна оси симметрии первой цилиндрической поверхности. 8. Earplugs according to claim 3, characterized in that the axis of symmetry of the second cylindrical surface is parallel or not parallel to the axis of symmetry of the first cylindrical surface.
9. Беруши по любому из пп. 1-8, отличающиеся тем, что введен конфузор, выходное отверстие которого сопряжено со сквозным отверстием регулятора уровня затухания шума. 9. Earplugs according to any one of paragraphs. 1-8, characterized in that a confuser is introduced, the outlet of which is associated with the through hole of the noise attenuation level regulator.
PCT/RU2020/000630 2020-01-23 2020-11-23 Ear plug WO2021150135A1 (en)

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RU2020102756A RU2731799C1 (en) 2020-01-23 2020-01-23 Earplugs
RU2020102756 2020-01-23

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Citations (5)

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US6082485A (en) * 1999-08-10 2000-07-04 Smith; Eric B. Adjustable earplug
EP0955025B1 (en) * 1998-04-29 2004-07-07 Cabot Safety Intermediate Corporation Selective nonlinear attenuating earplug
US20080276945A1 (en) * 2007-05-11 2008-11-13 Rosen Leon D Lateral sliding adjustable earplug
KR20150069487A (en) * 2013-12-13 2015-06-23 최재우 Adjustable sound insulation earplugs
US20190327549A1 (en) * 2018-04-19 2019-10-24 Microsoft Technology Licensing, Llc Adjustable in-ear plug

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Publication number Priority date Publication date Assignee Title
RU2660999C2 (en) * 2014-01-10 2018-07-11 3М Инновейтив Пропертиз Компани Molded foam push-to-fit earplug

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0955025B1 (en) * 1998-04-29 2004-07-07 Cabot Safety Intermediate Corporation Selective nonlinear attenuating earplug
US6082485A (en) * 1999-08-10 2000-07-04 Smith; Eric B. Adjustable earplug
US20080276945A1 (en) * 2007-05-11 2008-11-13 Rosen Leon D Lateral sliding adjustable earplug
KR20150069487A (en) * 2013-12-13 2015-06-23 최재우 Adjustable sound insulation earplugs
US20190327549A1 (en) * 2018-04-19 2019-10-24 Microsoft Technology Licensing, Llc Adjustable in-ear plug

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