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US-20260129327-A1 - OPEN EARPHONES

US20260129327A1US 20260129327 A1US20260129327 A1US 20260129327A1US-20260129327-A1

Abstract

The present disclosure provides an open earphone, including: a sound production component including: a transducer including a diaphragm configured to generate a sound; and a housing forming a cavity used to accommodate the transducer, wherein in a wearing state, the housing is provided with a sound guiding hole on an inner side surface toward an auricle of a user for guiding a sound generated by a front side of the diaphragm out of the housing and into an ear canal, and at least two pressure relief holes are provided on one or more other side surfaces of the housing, the at least two pressure relief holes including a first pressure relief hole away from the ear canal and a second pressure relief hole near the ear canal, and a sound pressure at the first pressure relief hole being greater than a sound pressure at the second pressure relief hole.

Inventors

  • Lei Zhang
  • Peigeng TONG
  • Guolin XIE
  • Yongjian LI
  • Jiang Xu
  • Tao Zhao
  • Duoduo WU
  • Ao Ji
  • Xin Qi

Assignees

  • Shenzhen Shokz Co., Ltd.

Dates

Publication Date
20260507
Application Date
20260106
Priority Date
20221028

Claims (20)

  1. 1 . An open earphone, comprising: a sound production component including: a transducer including a diaphragm configured to generate a sound under an action of an excitation signal; and a housing, the housing forming a cavity used to accommodate the transducer, wherein in a wearing state, the housing is provided with a sound guiding hole on an inner side surface toward an auricle of a user for guiding a sound generated by a front side of the diaphragm out of the housing and into an ear canal of the user, and at least two pressure relief holes are provided on one or more other side surfaces of the housing, the at least two pressure relief holes including a first pressure relief hole away from the ear canal and a second pressure relief hole near the ear canal, wherein acoustic resistance nets are provided at the sound guiding hole and at the at least two pressure relief holes, respectively, and thicknesses of the acoustic resistance nets at the at least two pressure relief holes are in a range of 40 μm to 150 μm.
  2. 2 . The open earphone of claim 1 , wherein an acoustic resistance net at the sound guiding hole and acoustic resistance nets at the at least two pressure relief holes have a same acoustic impedance rate.
  3. 3 . The open earphone of claim 1 , wherein an acoustic resistance net at the sound guiding hole has a different acoustic impedance rate from acoustic resistance nets at the at least two pressure relief holes.
  4. 4 . The open earphone of claim 1 , wherein the acoustic resistance nets provided at the sound guiding hole or the at the at least two pressure relief holes include a gauze mesh or a steel mesh.
  5. 5 . The open earphone of claim 4 , wherein the acoustic resistance net at the sound guiding hole includes a gauze mesh and an etched steel mesh.
  6. 6 . The open earphone of claim 5 , wherein an acoustic impedance rate of the gauze mesh is in a range of 2 MKS rayls to 50 MKS rayls.
  7. 7 . The open earphone of claim 5 , wherein an acoustic impedance rate of the steel mesh is in a range of 0.1 MKS rayls to 10 MKS rayls.
  8. 8 . The open earphone of claim 1 , wherein a distance between an upper surface of the acoustic resistance net at the first pressure relief hole towards an exterior of the housing and an outer surface of the housing is in a range of 0.8 mm to 0.9 mm.
  9. 9 . The open earphone of claim 1 , wherein a distance between an upper surface of the acoustic resistance net at the second pressure relief hole towards an exterior of the housing and an outer surface of the housing is in a range of 0.7 mm to 0.8 mm.
  10. 10 . The open earphone of claim 1 , wherein the first pressure relief hole and the second pressure relief hole are respectively located on different side surfaces of the housing.
  11. 11 . The open earphone of claim 1 , wherein a ratio of an area of the sound guiding hole to a square of a depth of the sound guiding hole is in a range of 0.31 to 512.2.
  12. 12 . The open earphone of claim 11 , wherein the ratio of the area of the sound guiding hole to the square of the depth of the sound guiding hole is in a range of 10 to 50.
  13. 13 . The open earphone of claim 1 , wherein an opening area of the sound guiding hole is in a range of 2.875 mm 2 to 46 mm 2 .
  14. 14 . The open earphone of claim 1 , wherein a depth of the sound guiding hole is in a range of 0.3 mm to 3 mm.
  15. 15 . The open earphone of claim 1 , wherein a ratio of a long axis dimension to a short axis dimension of the sound guiding hole is in a range of 1 to 10.
  16. 16 . The open earphone of claim 1 , wherein a length of the sound guiding hole is not greater than 17 mm, and a width of the sound guiding hole is not greater than 10 mm.
  17. 17 . The open earphone of claim 1 , wherein a length of the sound guiding hole is within a range of 2 mm to 11 mm.
  18. 18 . The open earphone of claim 1 , wherein a front side of the diaphragm and the cavity forms a front cavity, and a resonance frequency of the front cavity is in a range of 1 kHz to 10 kHz.
  19. 19 . The open earphone of claim 1 , wherein a sound pressure at the first pressure relief hole being greater than a sound pressure at the second pressure relief hole.
  20. 20 . The open earphone of claim 1 , wherein a ratio of an area of the first pressure relief hole to an area of the second pressure relief hole is in a range of 1 to 5.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. application Ser. No. 18/355,407, filed on Jul. 19, 2023, which is a continuation of International Application No. PCT/CN2023/079411, filed on Mar. 2, 2023, which claims priority of Chinese Patent Application No. 202211336918.4, filed on Oct. 28, 2022, Chinese Patent Application No. 202223239628.6, filed on Dec. 1, 2022, and International Application No. PCT/CN2022/144339, filed on Dec. 30, 2022, the entire contents of each of which are hereby incorporated by reference. TECHNICAL FIELD The present disclosure relates to the field of acoustics technology, and in particular, to an open earphone. BACKGROUND With the development of acoustic output technology, earphones have been widely used in people's daily lives, and can be used in conjunction with electronic devices such as cell phones and computers to provide users with an auditory feast. According to the way users wear them, the acoustic devices may include head-mounted, ear-hook, and in-ear types. The output of the earphones has a significant impact on the user's comfort. Therefore, it is desirable to provide an open earphone to improve the output performance of open earphones. SUMMARY Embodiments of the present disclosure provide an open earphone, including a sound production component including: a transducer including a diaphragm configured to generate a sound under an action of an excitation signal; and a housing, the housing forming a cavity used to accommodate the transducer, wherein in a wearing state, the housing may be provided with a sound guiding hole on an inner side surface toward an auricle of a user for guiding a sound generated by a front side of the diaphragm out of the housing and into an ear canal of the user, and at least two pressure relief holes may be provided on one or more other side surfaces of the housing, the at least two pressure relief holes including a first pressure relief hole away from the ear canal and a second pressure relief hole near the ear canal, and a sound pressure at the first pressure relief hole being greater than a sound pressure at the second pressure relief hole. In some embodiments, the first pressure relief hole and the second pressure relief hole may be respectively located on different side surfaces of the housing. In some embodiments, a ratio of an area of the first pressure relief hole to an area of the second pressure relief hole may be in a range of 1 to 5. In some embodiments, a ratio of a long axis dimension to a short axis dimension of the first pressure relief hole may be in a range of 1.3 to 8. In some embodiments, a ratio of a long axis dimension to a short axis dimension of the second pressure relief hole may be in a range of 1 to 6. In some embodiments, a ratio of a length to a width of a cross-section of the first pressure relief hole may be greater than a ratio of a length to a width of a cross-section of the second pressure relief hole. In some embodiments, a ratio of a length to a width of a cross-section of the first pressure relief hole may be smaller than a ratio of a length to a width of a cross-section of the second pressure relief hole. In some embodiments, a ratio of a length to a width of a cross-section of the first pressure relief hole may be equal to a ratio of a length to a width of a cross-section of the second pressure relief hole. In some embodiments, a ratio of an area of the sound guiding hole to a total area of the first pressure relief hole and the second pressure relief hole may be in a range of 0.1 to 0.99. In some embodiments, the diaphragm may divide the cavity into a front cavity and a rear cavity corresponding to the front side and a rear side of the diaphragm, respectively, wherein a ratio of a volume of the rear cavity to a volume of the front cavity may be in a range of 0.1 to 10. In some embodiments, the diaphragm may divide the cavity into a front cavity and a rear cavity corresponding to the front side and a rear side of the diaphragm, respectively, wherein a ratio of a resonance frequency of the front cavity to a resonance frequency of the rear cavity may be in a range of 0.1 to 5. In some embodiments, a ratio of an area of the sound guiding hole to a total area of the first pressure relief hole and the second pressure relief hole may be in a range of 1 to 10. In some embodiments, the diaphragm may divide the cavity into a front cavity and a rear cavity corresponding to the front side and a rear side of the diaphragm, respectively, wherein a ratio of a volume of the rear cavity to a volume of the front cavity may be in a range of 0.1 to 10. In some embodiments, the diaphragm may divide the cavity into a front cavity and a rear cavity corresponding to the front side and the rear side of the diaphragm, respectively, wherein a ratio of a resonance frequency of the front cavity to a resonance frequency of the rear cavity may be in a range of 0.5 to 10. In some embodiments, a ratio o