# US 2023/0276166 A1 · Acoustic output devices

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- Number: US 2023/0276166 A1
- Document ID: US20230276166A1
- Status: Published application
- Kind: A1
- Application number: 18/313,354
- Filed: 2023-05-07
- Published: 2023-08-31
- Earliest claimed: 2021-04-09
- Assignees: Shenzhen Shokz Co., Ltd.
- Applicants: Shenzhen Shokz Co., Ltd.
- Inventors: Lei ZHANG; Zhen WANG; Liwei WANG; Peigeng TONG; Fengyun LIAO; Xin QI
- Web page: https://patentgrep.com/patent/US20230276166A1

## CPC

- H04R 1/2811: {for loudspeaker transducers}
- H04R 9/066: {using the principle of inertia}
- H04R 1/023: {Screens for loudspeakers}
- H04R 1/1008: {Earpieces of the supra-aural or circum-aural type}
- H04R 1/1075: {Mountings of transducers in earphones or headphones}
- H04R 1/2826: {for loudspeaker transducers}
- H04R 1/2849: {for loudspeaker transducers}
- H04R 1/345: {for loudspeakers}
- H04R 1/406: {microphones}
- H04R 7/12: Non-planar diaphragms or cones
- H04R 9/025: {Magnetic circuit}
- H04R 9/045: {Mounting (H04R9/043 takes precedence)}
- H04R 9/06: Loudspeakers
- H04R 23/02: Transducers using more than one principle simultaneously
- H04R 25/606: {acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window}
- H04R 31/003: {for diaphragms or their outer suspension}
- H04R 1/1016: {Earpieces of the intra-aural type}
- H04R 1/1041: {Mechanical or electronic switches, or control elements (switches in general H01H)}
- H04R 1/1083: {Reduction of ambient noise (active noise reduction per se G10K11/175; protective devices for the ear, e.g. providing acoustic protection A61F11/06)}
- H04R 5/0335: {Earpiece support, e.g. headbands or neckrests (for monophonic headphones H04R1/105)}
- H04R 2400/03: Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
- H04R 2460/11: Aspects relating to vents, e.g. shape, orientation, acoustic properties in ear tips of hearing devices to prevent occlusion
- H04R 2460/13: Hearing devices using bone conduction transducers
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

The present disclosure provides an acoustic output device comprising a bone conduction acoustic assembly used to generate a bone conduction acoustic wave; an air conduction acoustic assembly used to generate an air conduction acoustic wave; and a housing used to accommodate at least a portion of elements of the bone conduction acoustic assembly and the air conduction acoustic assembly. The housing includes a first chamber used to accommodate at least a portion of the bone conduction acoustic assembly; and a second chamber. The housing is provided with a sound outlet communicated with the second chamber. The air conduction acoustic wave is transmitted to an outside of the acoustic output device via the sound outlet. A frequency response curve of the air conduction acoustic wave has at least one resonance peak. A peak resonance frequency of the at least one resonance peak is greater than or equal to 1 kHz.

## Claims

### Claim 1

An acoustic output device comprising:
a bone conduction acoustic assembly used to generate a bone conduction sound wave;
an air conduction acoustic assembly used to generate an air conduction sound wave; and
a housing used to accommodate at least a portion of elements of the bone conduction acoustic assembly and the air conduction acoustic assembly, the housing including a first chamber and a second chamber, the first chamber being used to accommodate at least a portion of the bone conduction acoustic assembly, the housing being provided with a sound outlet communicated with the second chamber, the air conduction sound wave being transmitted to an outside of the acoustic output device via the sound outlet;
a frequency response curve of the air conduction sound wave having at least one resonance peak, a peak resonance frequency of the at least one resonance peak being greater than or equal to 1 kHz.

### Claim at position 2

2-4. (canceled)

### Claim 5 (depends on 1)

The acoustic output device of claim 1, wherein the housing is further provided with at least one pressure relief hole communicated with the first chamber, the at least one pressure relief hole includes a first pressure relief hole and a second pressure relief hole, the first pressure relief hole being provided farther away from the sound outlet than the second pressure relief hole, an effective area of an outlet end of the first pressure relief hole being larger than an effective area of an outlet end of the second pressure relief hole.

### Claim 6

(canceled)

### Claim 7 (depends on 5)

The acoustic output device of claim 5, wherein the housing includes a first side wall, a second side wall, a third side wall, and a fourth side wall,
the side wall and the second side wall are disposed on opposite sides of the bone conduction acoustic assembly,
the third side wall and the fourth side wall are connected to the first side wall and the second side wall and spaced apart from each other,
the sound outlet and the first pressure relief hole is provided on the first side wall and the second side wall, respectively, and
the second pressure relief hole is provided on the third side wall or the fourth side wall.

### Claim 8 (depends on 7)

The acoustic output device of claim 7, wherein the at least one pressure relief hole further includes a third pressure relief hole,
the effective area of the outlet end of the second pressure relief hole is larger than an effective area of an outlet end of the third pressure relief hole, and
the second pressure relief hole and the third pressure relief hole are provided on the third side wall and the fourth side wall, respectively.

### Claim 9

(canceled)

### Claim 10 (depends on 1)

The acoustic output device of claim 1, wherein the housing is further provided with at least one tuning hole communicated with the second chamber, and
the peak resonance frequency of the at least one resonance peak when the at least one tuning hole is in an open state is shifted to high frequency compared to the peak resonance frequency of the at least one resonance peak when the at least one tuning hole is in a closed state.

### Claim at position 9

11-14. (canceled)

### Claim 15 (depends on 10)

The acoustic output device of claim 10, wherein the housing includes a first side wall and a second side wall disposed on opposite sides of the bone conduction acoustic assembly, and
the at least one tuning hole includes a first tuning hole, the sound outlet and the first tuning hole being disposed on the first side wall and the second side wall, respectively.

### Claim 16 (depends on 15)

The acoustic output device of claim 15, wherein the housing further includes a third side wall and a fourth side wall connecting the first side wall and the second side wall and spaced apart from each other, and
the at least one tuning hole further includes a second tuning hole, the second tuning hole being provided on the third side wall or the fourth side wall.

### Claim 17 (depends on 16)

The acoustic output device of claim 16, wherein
an effective area of an outlet end of the first tuning hole is larger than an effective area of an outlet end of the second tuning hole; or
an actual area of the outlet end of the first tuning hole is larder than an actual area of the outlet end of the second tuning hole.

### Claim at position 13

18-20. (canceled)

### Claim 21 (depends on 10)

The acoustic output device of claim 10, wherein the housing is provided with at least one pressure relief hole communicated with the first chamber,
the at least one tuning hole and the at least one pressure relief hole form at least one pair of adjacent holes, each pair of adjacent holes including one of the at least one tuning hole and one of the at least one pressure relief hole arranged adjacent to each other, and an interval distance between the tuning hole and the pressure relief hole in each pair of adjacent holes is less than or equal to 2 mm.

### Claim 22 (depends on 21)

The acoustic output device of claim 21, wherein in each pair of adjacent holes, an effective area of an outlet end of the pressure relief hole is greater than an effective area of an outlet end of the sound tuning hole.

### Claim at position 16

23-28. (canceled)

### Claim 29 (depends on 1)

The acoustic output device of claim 1, further including:
a sound conduction component connected to the housing, the sound conduction component being provided with a sound guiding channel, the sound guiding channel being communicated with the sound outlet and being used to guide the air conduction sound wave to the outside of the acoustic output device.

### Claim at position 18

30-36. (canceled)

### Claim 37 (depends on 29)

The acoustic output device of claim 29, wherein the housing is provided with at least one pressure relief hole communicated with the first chamber, an effective area of an outlet end of the sound guiding channel being greater than or equal to a sum of an effective area of an outlet end of each of the at least one pressure relief hole communicated with the first chamber on the housing.

### Claim at position 20

38-39. (canceled)

### Claim 40 (depends on 29)

The acoustic output device of claim 29, wherein the housing is provided with at least one tuning hole communicated with the second chamber, an effective area of an outlet end of the sound guiding channel being greater than an effective area of an outlet end of each tuning hole in the at least one tuning hole.

### Claim 41 (depends on 40)

The acoustic output device of claim 40, wherein the effective area of the outlet end of the sound guiding channel is greater than a sum of an effective area of the outlet end of each of the at least one tuning hole.

### Claim at position 23

42-43. (canceled)

### Claim 44 (depends on 1)

The acoustic output device of claim 1, wherein the bone conduction acoustic assembly includes a magnetic circuit system and a coil assembly, wherein the magnetic circuit system forms a magnetic gap, the coil assembly is provided in the first chamber and extends into the magnetic gap, and the coil assembly being provided with at least one communication hole.

### Claim 45 (depends on 44)

The acoustic output device of claim 44, wherein the at least one communication hole is located on a portion of the coil assembly located outside the magnetic gap.

### Claim 46 (depends on 45)

The acoustic output device of claim 45, wherein the coil assembly includes a coil and a coil support, the coil support being used to connect the coil to the housing and to make the coil extend into the magnetic gap, the at least one communication hole being provided on the coil support.

### Claim 47 (depends on 46)

The acoustic output device of claim 46, wherein the bone conduction acoustic assembly further includes an elastic element located in the first chamber, a central region of the elastic element is connected to the magnetic circuit system, and a peripheral region of the elastic element is connected to the housing, thereby suspending the magnetic circuit system within the housing.

### Claim at position 28

48-52. (canceled)

### Claim 53 (depends on 1)

The acoustic output device of claim 1, further including:
a communication channel communicating the first chamber with the second chamber, a peak resonance frequency of the at least one resonance peak when the communication channel is in an open state being shifted to high frequency compared to the peak resonance frequency of the at least one resonance peak when the communication channel is in a closed state, an offset to high frequency being greater than or equal to 500 Hz.

### Claim at position 30

54-57. (canceled)

### Claim 58 (depends on 53)

The acoustic output device of claim 53, wherein the housing is further provided with a pressure relief hole communicated with the first chamber and a tuning hole communicated with the second chamber, the communication channel being provided outside of the housing and connecting the pressure relief hole and the tuning hole.

### Claim 59

(canceled)