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
at least two sound guiding holes located on the housing and configured to guide the sound wave inside the housing to an outside of the housing, wherein the guided sound waves having different phases to interfere with each other to reduce a sound pressure level of a leaked sound wave, wherein:
the at least two sound guiding holes include at least one perforative hole with damping layer, the damping layer is configured to adjust at least one of a phase and an amplitude of the guided sound wave passing through the at least one perforative hole.
2. The speaker of claim 1 , 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.
3. The speaker of claim 1 , wherein the damping layer includes one or more damping layers.
4. The speaker of claim 1 , wherein the damping layer is configured to shield the perforative hole.
5. The speaker of claim 1 , wherein a location of the at least two sound guiding holes is determined based on at least one of: a vibration frequency of the transducer, a shape of the at least two sound guiding holes, a number of the at least two sound guiding holes, a target region where an amplitude of the leaked sound wave is to be reduced, or a frequency range within which an amplitude of the leaked sound wave is to be reduced.
6. The speaker of claim 1 , wherein:
the housing includes a bottom or a sidewall; and
the at least two sound guiding holes are located on the bottom and the sidewall of the housing, respectively.
7. The speaker of claim 1 , wherein:
the housing includes an opening and a vibration board, the vibration board stretching out from the opening of the housing and vibrating synchronically with the transducer.
8. The speaker of claim 1 , further comprises a linking component residing between the transducer and the housing, the linking component being configured to fix the transducer inside the housing.
9. The speaker of claim 1 , wherein the guided sound waves includes at least two sound waves having a substantially same amplitude.
10. The speaker of claim 1 , wherein the guided sound waves includes at least two sound waves having a same phase.
11. The speaker of claim 10 , wherein the at least two guided sound waves have a same wavelength.
12. The speaker of claim 1 , wherein the guided sound waves includes at least two sound waves having different phases.
13. The speaker of claim 12 , wherein the at least two sound waves have different wavelengths.
14. The speaker of claim 1 , wherein the at least two sound guiding holes are located at different sidewalls of the housing.
15. The speaker of claim 1 , wherein locations of the at least two sound guiding holes have different heights along an axial direction of a sidewall of the housing.
16. The speaker of claim 1 , wherein a shape of the at least two sound guiding holes include circle, ellipse, quadrangle, rectangle, or linear.
17. 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
at least two sound guiding holes located on the housing and configured to guide the sound wave inside the housing to an outside of the housing, wherein the guided sound waves having different phases to interfere with each other to reduce a sound pressure level of a leaked sound wave, wherein:
the at least two sound guiding holes include at least one perforative hole with damping layer, the damping layer is configured to adjust at least one of a phase and an amplitude of the guided sound wave passing through the at least one perforative hole.
18. The method of claim 17 , 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.
19. The method of claim 17 , wherein the damping layer includes one or more damping layers.
20. The method of claim 17 , wherein the damping layer is configured to shield the perforative hole.