Systems and methods for suppressing sound leakage
A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.
1. A speaker, comprising:
a housing;
a transducer residing inside the housing and configured to generate vibrations, the vibrations producing a sound wave inside the housing; and
two sound guiding holes located on different sidewalls of the housing, the two sound guiding holes being configured to guide the sound wave inside the housing to an outside of the housing, wherein the two guided sound waves having different phases and substantially same amplitude.
2. The speaker of claim 1 , wherein the two guided sound waves have substantially opposite phases.
3. The speaker of claim 2 , wherein the two guided sound waves interfere with each other to reduce a sound pressure level of a leaked sound wave of the speaker.
4. The speaker of claim 3 , wherein at least a portion of the leaked sound wave whose sound pressure level is reduced is within a range of 1500 Hz to 3000 Hz.
5. The speaker of claim 4 , wherein the sound pressure level of the at least a portion of the leaked sound wave is reduced by more than 10 dB on average.
6. The speaker of claim 3 , wherein at least a portion of the leaked sound wave whose sound pressure level is reduced is within a range of 2000 Hz to 2500 Hz.
7. The speaker of claim 6 , wherein the sound pressure level of the at least a portion of the leaked sound wave is reduced by more than 20 dB on average.
8. The speaker of claim 1 , wherein each of the two sound guiding holes include a perforative hole with damping layer, the damping layer is configured to adjust an amplitude of the guided sound wave passing through the perforative hole.
9. The speaker of claim 8 , wherein the damping layer includes at least one of a tuning paper, a tuning cotton, a nonwoven fabric, a silk, a cotton, a sponge, or a rubber.
10. The speaker of claim 1 , wherein the housing contacts with a user's auricle,
the housing has a sidewall facing the user and a bottom connected to the sidewall; and
the two sound guiding holes are located on the bottom and the sidewall of the housing, respectively.
11. The speaker of claim 1 , wherein a shape of the two sound guiding holes include circle, ellipse, quadrangle, rectangle, or linear.
12. The speaker of claim 1 , further comprising:
an acoustic route coupled to one of the two sound guiding holes, wherein the guided sound wave of the one of the two sound guiding holes is propagated to the one of the two sound guiding holes along the acoustic route, and the acoustic route is configured to adjust a frequency of the guided sound wave of the one of the two sound guiding holes.
13. The speaker of claim 12 , wherein the acoustic route is configured to adjust a frequency of the guided sound wave of the one of the two sound guiding holes by filtering sound waves in target frequencies.
14. The speaker of claim 12 , wherein the acoustic route includes one or more lumen structures.
15. The speaker of claim 12 , wherein the acoustic route includes one or more resonance cavities.
16. A method, comprising:
providing a speaker including:
a housing;
a transducer residing inside the housing and configured to generate vibrations, the vibrations producing a sound wave inside the housing; and
two sound guiding holes located on different sidewalls of the housing, the two sound guiding holes being configured to guide the sound wave inside the housing to an outside of the housing, wherein the two guided sound waves having different phases and substantially same amplitude.
17. The speaker of claim 16 , wherein the two guided sound waves have substantially opposite phases.
18. The speaker of claim 17 , wherein the two guided sound waves interfere with each other to reduce a sound pressure level of a leaked sound wave of the speaker.
19. The speaker of claim 16 , wherein each of the two sound guiding holes include a perforative hole with damping layer, the damping layer is configured to adjust an amplitude of the guided sound wave passing through the perforative hole.
20. The speaker of claim 16 , wherein the housing contacts with a user's auricle,
the housing has a sidewall facing the user and a bottom connected to the sidewall; and
the two sound guiding holes are located on the bottom and the sidewall of the housing, respectively.