Acoustic output device
The present disclosure relates to an acoustic output device. The acoustic output device may include at least one acoustic driver and a supporting structure. The at least one acoustic driver may be configured to generate a sound and output the sound through at least two sound guiding holes. The supporting structure may be configured to support the at least one acoustic driver and dispose the at least two sound guiding holes on two sides of an auricle of a user, respectively.
1. An acoustic output device, comprising:
at least one acoustic driver configured to generate a sound and output the sound through at least two sound guiding holes; and
a supporting structure configured to support the at least one acoustic driver and disposing the at least two sound guiding holes on two sides of an auricle of a user, respectively, the auricle of the user increasing a distance difference between two acoustic paths that the sound is transmitted from the sound guiding holes on two sides of an auricle of the user to the user's ear canal.
2. The acoustic output device of claim 1 , wherein
the at least one acoustic driver comprises a vibration diaphragm,
a front chamber configured to radiate the sound is disposed on the supporting structure in front of the vibration diaphragm,
a rear chamber configured to radiate the sound is disposed on the supporting structure behind the vibration diaphragm,
the front chamber is acoustically coupled with a first sound guiding hole of the at least two sound guiding holes, and
the rear chamber is acoustically coupled with a second sound guiding hole of the at least two sound guiding holes.
3. The acoustic output device of claim 1 , wherein the at least two sound guiding holes output the sound with a phase difference.
4. The acoustic output device of claim 3 , wherein the at least two sound guiding holes output the sound with opposite phases.
5. The acoustic output device of claim 1 , wherein a distance d between the at least two sound guiding holes is between 1 cm and 12 cm.
6. The acoustic output device of claim 1 , wherein
the at least two sound guiding holes include two sound guiding holes, the two sound guiding holes being disposed on a front side and a rear side of the auricle of the user, respectively, and
an acoustic route between a first sound guiding hole of the two sound guiding holes, which is disposed on the front side of the auricle of the user and an ear of the user is shorter than an acoustic route between a second sound guiding hole which is disposed on the rear side of the auricle of the user and the ear of the user.
7. The acoustic output device of claim 1 , wherein
the at least two sound guiding holes include two sound guiding holes, the two sound guiding holes being disposed on a front side and a rear side of an auricle of the user, respectively, and
a ratio of a distance between a sound guiding hole disposed on the front side of the auricle of the user and the auricle and a distance between the at least two sound guiding holes is not greater than 0.5.
8. The acoustic output device of claim 1 , wherein
the at least one acoustic driver comprises a vibration diaphragm, and
acoustic routes between the vibration diaphragm and the at least two sound guiding holes are different.
9. The acoustic output device of claim 8 , wherein a ratio of the acoustic routes between the vibration diaphragm and the at least two sound guiding holes is 0.5-2.
10. The acoustic output device of claim 8 , wherein sounds generated by the at least one acoustic driver at the at least two sound guiding holes have different sound pressure amplitudes.
11. The acoustic output device of claim 8 , wherein structures between the at least two sound guiding holes and the at least one acoustic driver have different acoustic impedance.
12. The acoustic output device of claim 1 , further comprising:
at least one second acoustic driver configured to output sound through at least two second sound guiding holes, and the at least two second sound guiding holes being disposed on a same side of the auricle of the user.
13. The acoustic output device of claim 12 , wherein the at least two second sound guiding holes are disposed on a front side of the auricle of the user.
14. The acoustic output device of claim 12 , further comprising:
a controller configured to cause the at least one acoustic driver to output a sound within a first frequency range, and cause the at least one second acoustic driver to output a sound within a second frequency range, a frequency within the second frequency range being higher than that within the first frequency range.
15. The acoustic output device of claim 14 , wherein a distance between the at least two second sound guiding holes is less than a distance between the at least two sound guiding holes.
16. The acoustic output device of claim 12 , wherein the at least two second sound guiding holes output sounds with a phase difference.
17. The acoustic output device of claim 16 , wherein the at least two second sound guiding holes output sounds with an opposite phase difference.
18. The acoustic output device of claim 12 , wherein at least one of the at least two sound guiding holes or the at least two second sound guiding holes are disposed on the supporting structure.
19. The acoustic output device of claim 1 , wherein the supporting structure comprises a casing structure.
20. The acoustic output device of claim 1 , further comprising a baffle disposed between the at least two sound guiding holes.