Sound-producing apparatus, calibration method for sound-producing apparatus, sound-producing unit and headset equipment

1 . A sound-producing apparatus, comprising:

two sound-producing units;

wherein each of the sound-producing units comprises a cavity, a sound-producing unit body and an adjusting apparatus;

the sound-producing unit body is provided in the cavity, and the cavity is separated into a front cavity and a rear cavity;

the adjusting apparatus comprises an adjusting plate and a driving portion; and

one end of the adjusting plate is rotatably provided on an inner wall of the rear cavity, and the driving portion is configured to drive the adjusting plate to move so as to adjust an effective volume of the rear cavity;

wherein in each of the sound-producing units, the inner wall of the rear cavity is provided with a plurality of sealing fitting portions on a rotation track of the adjusting plate, and the other end of the adjusting plate is configured to move to be sealingly connected with one of the sealing fitting portions.

2 . The sound-producing apparatus according to claim 1 , wherein the plurality of the sealing fitting portions is provided at an included angle, the included angle between two adjacent sealing fitting portions is α, and α is greater than 0° and less than 90°.

3 . The sound-producing apparatus according to claim 1 , wherein the plurality of the sealing fitting portions is provided at intervals according to a preset rotation angle of the adjusting plate.

4 . The sound-producing apparatus according to claim 1 , wherein the plurality of the sealing fitting portions comprises a limiting portion close to one end of the front cavity, and the limiting portion is protrudingly provided on the inner wall of the rear cavity to limit a displacement of the adjusting plate.

5 . The sound-producing apparatus according to claim 1 , wherein an angle between the adjusting plate and the inner wall of the rear cavity is adjustable, so as to adjust the rear cavity.

6 . The sound-producing apparatus according to claim 1 , wherein a shape of the rear cavity is polygon.

7 . The sound-producing apparatus according to claim 1 , wherein the adjusting plate is a telescopic plate with adjustable length, and a telescopic driving structure of the adjusting plate is electrically connected to a control apparatus; and

after the adjusting plate moves to a designated position, two ends of the adjusting plate are telescopically adjusted to sealingly abut against corresponding inner walls.

8 . The sound-producing apparatus according to claim 7 , wherein a plurality of plate segments are sleeved in sequence to achieve adjustable telescopicity by changing a distance between each of the plate segments; or

two plate segments are connected through a flexible telescopic sleeve, and the adjustable telescopicity of the adjusting plate is achieved by directly stretching and compressing the telescopic sleeve.

9 . The sound-producing apparatus according to claim 1 , wherein one end of the adjusting plate is provided at a middle of an inner wall of the rear cavity, and a plurality of sealing fitting portions are distributed on two adjacent inner walls of the rear cavity along a rotation track of the adjusting plate.

10 . A calibration method for a sound-producing apparatus, wherein the sound-producing apparatus comprises two sound-producing units; each of the sound-producing units comprises a cavity, a sound-producing unit body and an adjusting apparatus; the sound-producing unit body is provided in the cavity, and the cavity is separated into a front cavity and a rear cavity; the adjusting apparatus comprises an adjusting plate and a driving portion; one end of the adjusting plate is rotatably provided on an inner wall of the rear cavity, and the driving portion is configured to drive the adjusting plate to move so as to adjust an effective volume of the rear cavity;

the calibration method for the sound-producing apparatus comprises:

obtaining frequency response parameters of the two sound-producing units; and

controlling the adjusting apparatus and/or an input voltage of at least one of the sound-producing units according to a differential value between the frequency response parameters to make the differential value between the frequency response parameters of the two sound-producing units be within a preset range.

11 . The calibration method for the sound-producing apparatus according to claim 10 , wherein the frequency response parameters comprise a peak frequency and/or a valley impedance;

the obtaining frequency response parameters of the two sound-producing units comprises:

in response to respectively playing frequency sweep signals at a rated voltage to the two sound-producing units, obtaining current signals returned by the two sound-producing units;

calculating to obtain impedance curves of the two sound-producing units according to the rated voltage and the two obtained current signals; and

obtaining a peak frequency f 01 and a peak frequency f 02 of the two sound-producing units and/or a valley impedance Z e1 and a valley impedance Z e2 of the two sound-producing units according to the two impedance curves.

12 . The calibration method for the sound-producing apparatus according to claim 10 , wherein the frequency response parameter comprises a peak frequency;

the controlling the adjusting apparatus and/or the input voltage of at least one of the sound- producing units according to the differential value between the frequency response parameters to make the differential value between the frequency response parameters of the two sound-producing units be within the preset range comprises:

comparing the peak frequency f 01 and the peak frequency f 02 of the two sound-producing units to obtain a peak frequency differential value; and

controlling the adjusting apparatus of at least one sound-producing unit according to the peak frequency differential value to make the peak frequency differential value between the two sound-producing units be within the preset range.

13 . The calibration method for the sound-producing apparatus according to claim 10 , wherein the frequency response parameter comprises a valley impedance;

the controlling the adjusting apparatus and/or the input voltage of at least one of the sound-producing units according to the differential value between the frequency response parameters to make the differential value between the frequency response parameters of the two sound-producing units be within the preset range comprises:

comparing the valley impedance Z e1 and the valley impedance Z e2 of the two sound-producing unit to obtain a valley impedance differential value; and

controlling the input voltage of at least one of the sound-producing units according to the valley impedance differential value and a preset mapping relationship to make the valley impedance differential value between the two sound-producing units be within the preset range.

14 . The calibration method for the sound-producing apparatus according to claim 12 , wherein the controlling the adjusting apparatus of at least one sound-producing unit according to the peak frequency differential value to make the peak frequency differential value between the two sound-producing units be within the preset range comprises:

obtaining an effective volume size of the rear cavity of the sound-producing unit that needs to be adjusted according to the peak frequency differential value and a preset mapping relationship; and

controlling the corresponding driving portion to drive the adjusting plate to move according to the obtained effective volume size of the rear cavity, and adjusting the effective volume of the corresponding rear cavity.

15 . The calibration method for the sound-producing apparatus according to claim 14 , wherein the controlling the corresponding driving portion to drive the adjusting plate to move according to the obtained effective volume size of the rear cavity, and adjusting the effective volume of the corresponding rear cavity comprises:

determining a sealing fitting portion corresponding to the effective rear cavity volume size according to the obtained effective volume size of the rear cavity; and

controlling the corresponding driving portion to drive the adjusting plate to move to sealingly cooperate with the determined sealing fitting portion, and completing the adjustment of the effective volume of the rear cavity.

16 . A sound-producing unit, comprising:

a cavity;

a sound-producing unit body; and

an adjusting apparatus;

wherein the sound-producing unit body is provided in the cavity and the cavity is separated into a front cavity and a rear cavity; the adjusting apparatus comprises an adjusting plate and a driving portion, and one end of the adjusting plate is rotatably provided on an inner wall of the rear cavity; the driving portion is configured to drive the adjusting plate to move so as to adjust an effective volume of the rear cavity;

wherein in each of the sound-producing units, the inner wall of the rear cavity is provided with a plurality of sealing fitting portions on a rotation track of the adjusting plate, and the other end of the adjusting plate is configured to move to be sealingly connected with one of the sealing fitting portions.

17 . A headset equipment, comprising:

a wearing body; and

a supporting portion extending backward from two ends of the wearing body;

wherein the supporting portion comprises at least one sound-producing unit according to claim 16 .

18 . The headset equipment according to claim 17 , wherein two sound-producing units are provided at intervals in a same housing, and rear cavities of the two sound-producing units are on a same side of the housing facing away from user's ears.

19 . The headset equipment according to claim 18 , wherein the two sound-producing units are in a same phase mode.