Acoustic output apparatus

1. An acoustic output apparatus, comprising:

at least one low-frequency acoustic driver that outputs sounds from at least two first sound guiding holes;

at least one high-frequency acoustic driver that outputs sounds from at least two second sound guiding holes; and

a support component configured to support the at least one high-frequency acoustic driver and the at least one low-frequency acoustic driver, and cause the at least two first sound guiding holes and the at least two second sound guiding holes to locate away from a position of an ear of a user, wherein

a phase difference of the sounds output from the at least two first sound guiding holes is a first phase difference, a phase difference of the sounds output from the at least two second sound guiding holes is a second phase difference, an absolute value of the first phase difference is less than an absolute value of the second phase difference.

2. The acoustic output apparatus of claim 1 , wherein the sounds output from the low-frequency acoustic driver are in a first frequency range, the sounds output from the high-frequency acoustic driver are in a second frequency range, the second frequency range includes frequencies higher than the first frequency range.

3. The acoustic output apparatus of claim 2 , wherein the first frequency range includes frequencies less than 650 Hz, and the second frequency range includes frequencies exceeding 1000 Hz.

4. The acoustic output apparatus of claim 2 , wherein the first frequency range and the second frequency range overlap.

5. The acoustic output apparatus of claim 1 , wherein the at least two first sound guiding holes and the at least two second sound guiding holes are located on the support component.

6. The acoustic output apparatus of claim 1 , wherein an amplitude ratio of the sounds output from the at least two first sound guiding holes is a first amplitude ratio, and an amplitude ratio of the sounds output from the at least two second sound guiding holes is a second amplitude ratio, the first amplitude ratio is greater than the second amplitude ratio, the first amplitude ratio and the second amplitude ratio are within a range of 1-1.5.

7. The acoustic output apparatus of claim 6 , wherein

a first acoustic route from the at least one low-frequency acoustic driver to the at least two first sound guiding holes includes an acoustic resistance material, and the acoustic resistance material having an acoustic impedance and affects the first amplitude ratio; or

a second acoustic route from the at least one high-frequency acoustic driver to the at least two second sound guiding holes includes an acoustic resistance material, the acoustic resistance material having an acoustic impedance and affects the second amplitude ratio.

8. The acoustic output apparatus of claim 7 , wherein the at least one low-frequency acoustic driver is located in a first housing that defines a first front chamber and a first rear chamber of the at least one low-frequency acoustic driver, wherein

the first front chamber of the at least one low-frequency acoustic driver is acoustically coupled to one of the at least two first sound guiding holes, and

the first rear chamber of the at least one low-frequency acoustic driver is acoustically coupled to the other one of the at least two first sound guiding holes.

9. The acoustic output apparatus of claim 8 , wherein the at least one high-frequency acoustic driver is located in a second housing that defines a second front chamber and a second rear chamber of the at least one high-frequency acoustic driver, wherein

the second front chamber of the at least one high-frequency acoustic driver is acoustically coupled to one of the at least two second sound guiding holes, and

the second rear chamber of the at least one high-frequency acoustic driver is acoustically coupled to the other one of the at least two second sound guiding holes.

10. The acoustic output apparatus of claim 9 , wherein the first front chamber and the first rear chamber of the at least one low-frequency acoustic driver have different acoustic impedances, and the second front chamber and the second rear chamber of the at least one high-frequency acoustic driver have different acoustic impedances.

11. The acoustic output apparatus of claim 10 , wherein an acoustic impedance ratio of the first front chamber and the first rear chamber of the at least one low-frequency acoustic driver exceeds an acoustic impedance ratio of the second front chamber and the second rear chamber of the at least one high-frequency acoustic driver.

12. The acoustic output apparatus of claim 11 , wherein the acoustic impedance ratio of the first front chamber and the first rear chamber of the at least one low-frequency acoustic driver is in a range of 0.8-1.2.

13. The acoustic output apparatus of claim 7 , wherein the first acoustic route includes at least one of a sound guiding tube, a sound cavity, a resonant cavity, a sound hole, a sound slit, or a tuning network.

14. The acoustic output apparatus of claim 13 , wherein a diameter of the sound guiding tube corresponding to the first acoustic route is not less than 1.5 mm.

15. The acoustic output apparatus of claim 13 , wherein a length of the sound guiding tube in the acoustic output apparatus is not greater than 100 mm.

16. The acoustic output apparatus of claim 13 , wherein the diameter of the sound guiding tube corresponding to the first acoustic route is not greater than 10 mm.

17. The acoustic output apparatus of claim 1 , wherein the absolute value of the first phase difference is within a range of 160-180 degrees, and the absolute value of the second phase difference is within a range of 170-180 degrees.

18. The acoustic output apparatus of claim 1 , wherein the at least one low-frequency acoustic driver outputs the sounds from the at least two first sound guiding holes based on different sound paths, and the at least one high-frequency acoustic driver outputs the sounds from the at least two second sound guiding holes based on different sound paths.

19. The acoustic output apparatus of claim 18 , wherein a ratio of the sound paths of the at least one low-frequency acoustic driver acoustically coupled to the at least two first sound guiding holes is in the range of 0.5-2.

20. The acoustic output apparatus of claim 1 , wherein the at least two first sound guiding holes have different sizes or shapes; or the at least two second sound guiding holes have different sizes or shapes.