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CN-122002187-A - Speaker module, headrest, seat, cabin and vehicle

CN122002187ACN 122002187 ACN122002187 ACN 122002187ACN-122002187-A

Abstract

The application provides a loudspeaker module, a headrest, a seat, a cabin and a vehicle. The speaker module comprises a shell, a first speaker, a second speaker and a first acoustic resistance piece. The shell encloses an accommodating space, the shell is provided with a first sound outlet hole, a second sound outlet hole and a third sound outlet hole which are arranged at intervals, the first loudspeaker encloses a first space and is provided with a communication hole, the communication hole is communicated with the first space, the second loudspeaker encloses a second space which is a closed space, the second loudspeaker and the first loudspeaker are arranged in parallel, and the first acoustic resistance piece is arranged at the third sound outlet hole. According to the loudspeaker module provided by the application, the first loudspeaker is matched with the first acoustic resistance piece to realize directional sounding of the middle-low frequency band, the rear cavity of the second loudspeaker is closed to realize directional sounding of the high frequency band, and the first loudspeaker and the second loudspeaker are arranged in parallel to realize directional sounding of the full frequency band, so that the good sound wave directivity of the full frequency band can be improved.

Inventors

  • HUANG SHICHUN
  • YANG HONGSHENG
  • AO WEI
  • JI CHENGXIA

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (20)

  1. 1. A loudspeaker module (10) is characterized by comprising a shell (1), a first loudspeaker (2), a second loudspeaker (3) and a first acoustic resistance piece (4); The shell (1) encloses an accommodating space (13), the shell (1) is provided with a first sound outlet hole (111), a second sound outlet hole (112) and a third sound outlet hole (121) which are arranged at intervals, the first sound outlet hole (111), the second sound outlet hole (112) and the third sound outlet hole (121) are communicated with the accommodating space (13), the first sound outlet hole (111) and the second sound outlet hole (112) face the same side, and the third sound outlet hole (121) and the first sound outlet hole (111) face different sides; The first loudspeaker (2) comprises a first basin frame (22) and a first vibrating diaphragm (23), the first vibrating diaphragm (23) is installed on the first basin frame (22), the first vibrating diaphragm (23) comprises a first surface (231) and a second surface (232), a first space (24) is defined by the second surface (232) and the first basin frame (22), the first basin frame (22) is provided with a communication hole (21), and the communication hole (21) is communicated with the first space (24); The first loudspeaker (2) is positioned in the accommodating space (13) and is mounted on the shell (1), the first surface (231) faces the first sound outlet hole (111) and cuts off the first sound outlet hole (111) and the accommodating space (13), and the communication hole (21) is communicated with the accommodating space (13); The second loudspeaker (3) comprises a second basin frame (31) and a second vibrating diaphragm (32), the second vibrating diaphragm (32) is mounted on the second basin frame (31), the second vibrating diaphragm (32) comprises a third face (321) and a fourth face (322), a second space (33) is defined by the fourth face (322) and the second basin frame (31), and the second space (33) is a closed space; The second loudspeaker (3) is positioned in the accommodating space (13) and is mounted on the shell (1), the third surface (321) faces the second sound outlet hole (112) and cuts off the second sound outlet hole (112) and the accommodating space (13), and the second loudspeaker (3) and the first loudspeaker (2) are arranged in parallel; The first acoustic resistance piece (4) is arranged in the third sound outlet hole (121) and covers the third sound outlet hole (121).
  2. 2. The speaker module (10) of claim 1, wherein the speaker module (10) further comprises a signal interface (5) and a low pass filter (6); the signal interface (5) is used for externally connecting a signal circuit to receive sound signals; the low-pass filter (6) is electrically connected between the first speaker (2) and the signal interface (5) for filtering sound signals input via the signal interface (5).
  3. 3. The speaker module (10) according to claim 2, wherein the low pass filter (6) is an inductance, the value l1=rl/(2Ω×f) of which RL is the impedance of the first speaker (2) and f is the cut-off frequency.
  4. 4. A loudspeaker module (10) according to claim 2 or 3, wherein the loudspeaker module (10) further comprises a high pass filter (7), the high pass filter (7) being electrically connected between the second loudspeaker (3) and the signal interface (5), the high pass filter (7) being arranged to filter sound signals input via the signal interface (5).
  5. 5. The speaker module (10) according to claim 4, wherein the high pass filter (7) is a capacitor having a capacitance c1=1/(2Ω×rh×f), where RH is the impedance of the second speaker (3) and f is a cut-off frequency.
  6. 6. A loudspeaker module (10) according to claim 3 or 5, wherein the value of the cut-off frequency f is in the range of 500Hz to 4 kHz.
  7. 7. The speaker module (10) according to any one of claims 1 to 6, wherein the housing (1) includes a first shell (14) and a second shell (15), the second shell (15) being mounted to the first shell (14) and enclosing the receiving space (13); The first sound outlet hole (111) and the second sound outlet hole (112) are both arranged on the first shell (14), and the first loudspeaker (2) and the second loudspeaker (3) are both arranged on the first shell (14); The third sound outlet hole (121) is provided in the second case (15).
  8. 8. The speaker module (10) of claim 7, wherein the first case (14) includes a bottom case (141) and a plurality of side cases (142), the plurality of side cases (142) each being connected to a periphery of the bottom case (141) and extending toward the second case (15), an end of the side case (142) remote from the bottom case (141) being connected to the second case (15); The first sound outlet hole (111) and the second sound outlet hole (112) are both arranged on the bottom shell (141).
  9. 9. The speaker module (10) as claimed in claim 7 or 8, wherein the second housing (15) includes a first wall (152), a second wall (153) and a third wall (154) connected in sequence, each of the first wall (152) and the third wall (154) is disposed to extend toward the first housing (14), an end of the first wall (152) away from the second wall (153) is connected to the first housing (14), an end of the third wall (154) away from the second wall (153) is connected to the first housing (14), and the third sound outlet (121) is disposed in at least one of the first wall (152), the second wall (153) and the third wall (154).
  10. 10. The speaker module (10) according to any one of claims 1 to 9, wherein a total area of openings of the third sound outlet holes (121) is in a range of 500mm 2 to 4000mm 2 .
  11. 11. The loudspeaker module (10) according to any one of claims 1 to 10, wherein the volume of air V in the receiving space (13) satisfies that V is not less than 0.15L.
  12. 12. The speaker module (10) according to any one of claims 1 to 11, wherein the flow resistance value R of the first acoustic resistive element (4) satisfies 1/(C enclosure )*10 -5 Pa.s/m 3 <R<1/(C enclosure )*10 -2 Pa.s/m 3 , where C enclosure ＝V/(ρc 2 ), V is the volume of air in the receiving space (13), ρ is the air density in the receiving space (13), and C is the sound velocity in the receiving space (13).
  13. 13. The speaker module (10) of any of claims 1-12, wherein the material of the first acoustic resistive element (4) comprises at least one of polyester fiber, porous polyurethane, rock wool.
  14. 14. The speaker module (10) according to any one of claims 1 to 13, wherein the speaker module (10) further comprises a second sound blocking member (8), the second sound blocking member (8) being provided to the first sound outlet (111) and covering the first sound outlet (111).
  15. 15. The speaker module (10) according to any one of claims 1 to 14, wherein the speaker module (10) further comprises a waveguide (9), the waveguide (9) being arranged between the second sound outlet opening (112) and the third face (321) for guiding sound output of the second speaker (3) to the second sound outlet opening (112).
  16. 16. A headrest (100) comprising a headrest body (20) and a speaker module (10) according to any one of claims 1 to 15, the speaker module (10) being mounted to the headrest body (20).
  17. 17. The headrest (100) as claimed in claim 16, wherein the headrest body (20) comprises a first headrest case (204) and a second headrest case (205), the first headrest case (204) being mounted to the second headrest case (205) and enclosing a mounting space (206), the first headrest case (204) having a mounting hole (2041), the mounting hole (2041) communicating with the mounting space (206); The loudspeaker module (10) is located in the installation space (206) and is installed in the installation hole (2041), and the first sound outlet hole (111) and the second sound outlet hole (112) in the loudspeaker module (10) are exposed through the installation hole (2041).
  18. 18. The headrest (100) according to claim 17, wherein the second headrest housing (205) comprises a first sub-housing (2052), a second sub-housing (2053) and a third sub-housing (2054) which are sequentially connected, each of the first sub-housing (2052) and the third sub-housing (2054) being disposed to extend toward the first headrest housing (204) with respect to the second sub-housing (2053), an end of the first sub-housing (2052) remote from the second sub-housing (2053) being connected to the first headrest housing (204), and an end of the third sub-housing (2054) remote from the second sub-housing (2053) being connected to the first headrest housing (204); The second pillow case (205) has a fourth sound outlet (2055), and the fourth sound outlet (2055) is provided in at least one of the first sub-case (2052), the second sub-case (2053), and the third sub-case (2054).
  19. 19. The headrest (100) of claim 18, wherein the headrest (100) further comprises a third acoustic resistive member disposed in the fourth sound outlet (2055) and covering the fourth sound outlet (2055).
  20. 20. The headrest (100) according to any one of claims 16 to 19, wherein the headrest (100) further comprises a fourth acoustic impedance member provided to the mounting hole (2041) and covering the first sound outlet hole (111).

Description

Speaker module, headrest, seat, cabin and vehicle Technical Field The application relates to the field of audio, in particular to a loudspeaker module, a headrest, a seat, a cabin and a vehicle. Background With the development of the audio direction of the automobile cabin, privacy characteristics, independent sound areas, personal entertainment systems and the like become main demands of consumers on the in-car sound, and the realization of the characteristics depends on a high-directivity loudspeaker system. The main scheme in the current industry is to arrange a loudspeaker close to the head of a person in a seat headrest, and to reduce the interference to passengers at other positions as much as possible while the passengers at the seat position obtain a high enough sound pressure level by utilizing the attenuation of sound pressure along with the distance and the physical blocking of the headrest. However, the directivity of the speaker in the current scheme is poor, so that it is difficult to provide good sound wave directivity, and interference is easily caused to passengers at other positions. Disclosure of Invention The application provides a loudspeaker module, a headrest, a seat, a cabin and a vehicle. The loudspeaker module comprises a shell, a first loudspeaker, a second loudspeaker and a first acoustic resistance piece, the directional sounding of the middle-low frequency band can be realized through the first loudspeaker matched with the first acoustic resistance piece, the directional sounding of the high frequency band can be realized through the closed design of the rear cavity of the second loudspeaker, and the directional sounding of the full frequency band can be realized through the parallel connection of the first loudspeaker and the second loudspeaker, so that the sound wave directivity of the full frequency band can be improved. In a first aspect, the present application provides a speaker module. The loudspeaker module comprises a shell, a first loudspeaker, a second loudspeaker and a first acoustic resistance piece, wherein the shell surrounds an accommodating space, the shell is provided with a first sound outlet hole, a second sound outlet hole and a third sound outlet hole which are arranged at intervals, the first sound outlet hole, the second sound outlet hole and the third sound outlet hole are all communicated with the accommodating space, the first sound outlet hole and the second sound outlet hole face the same side, the third sound outlet hole and the first sound outlet hole face different sides, the first loudspeaker comprises a first basin frame and a first vibrating diaphragm, the first vibrating diaphragm is arranged on the first basin frame, the first vibrating diaphragm comprises a first face and a second face, the second face and the first basin frame surround a first space, the first basin frame is provided with a communication hole, the communication hole is communicated with the first space, the first loudspeaker is arranged in the accommodating space and faces the first sound outlet hole and cuts off the first sound outlet hole, the communication hole is communicated with the accommodating space, the second loudspeaker comprises a second basin frame and a third vibrating diaphragm, the second vibrating diaphragm is arranged on the second basin frame, the third face comprises a third face and the third sound outlet hole is arranged in the accommodating space, the third face is parallel to the third sound outlet hole is arranged in the accommodating space, the third basin frame is connected with the third sound outlet hole in the first sound outlet hole, the third face is arranged in the accommodating space, and the third sound outlet hole is parallel to the third sound outlet hole is arranged in the accommodating space, and is sealed by the third sound outlet hole. According to the application, two speakers are arranged in parallel, one speaker is used for emitting sound in a middle-low frequency band, the directional sound emitting in the middle-low frequency band is realized through the hole of the rear cavity and the acoustic resistance material, the other speaker is used for emitting sound in a high frequency band, and the rear cavity is sealed to avoid back side sound leakage, so that the loudspeaker module has directivity in all frequency band sound emitting. In the application, through the design, the first loudspeaker outputs sound through the first sound output hole towards one side of the first radiation surface, which is away from the second radiation surface, and outputs sound through the communication hole and the third sound output hole towards one side of the second radiation surface, which is away from the first radiation surface, and the second loudspeaker outputs sound only through the second sound output hole towards one side of the first radiation surface, which is away from the second radiation surface. From this, go on the play sound of lo