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 causing a leaked sound wave spreading outside the housing from a portion of the housing;
at least one sound guiding hole located on the housing and configured to guide the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing, the guided sound wave having a phase different from a phase of the leaked sound wave, the guided sound wave interfering with the leaked sound wave in a target region,
wherein a frequency of a guided sound wave output from the at least one sound guiding hole relates to a distance between the at least one sound guiding hole and the portion of the housing, the at least one sound guiding hole includes at least one first hole and at least one second hole on the housing, the at least one first hole being configured to output first guided sound wave through the at least one first hole, the at least one second hole being configured to output second guided sound wave through the at least one second hole, a first distance between the at least one first hole and the portion of the housing being greater than a second distance between the at least one first hole and the portion of the housing, and a frequency of the first guided sound wave from the at least one first hole is smaller than a frequency of the second guided sound wave from the at least one second hole;
a button set on a button hole on the housing;
an elastic pad set between the button and the button hole; and
a rigid pad disposed between the elastic pad and the housing.
2. The speaker of claim 1 , wherein a first recessed area is set on the housing, and the button hole is set in the first recessed area.
3. The speaker of claim 2 , wherein the elastic pad is set on the first recessed area, and a second recessed area corresponding to the button hole is set on the elastic pad, the second recessed area extending to inside of the button hole.
4. The speaker of claim 3 , wherein a through hole is set on the rigid pad and the second recessed area of the elastic pad extends to the inside of the button hole through the through hole.
5. The speaker of claim 3 , wherein the button includes a button body and a button contact point, wherein the button body is disposed on a side of the elastic pad away from the housing and the button contact point extends to inside of the second recessed area.
6. The speaker of claim 5 , wherein the button includes at least two button single bodies disposed away from each other and a connecting portion connected to the at least two button single bodies.
7. The speaker of claim 6 , wherein the button contact point is set on each of the at least two button single bodies and an elastic bump for supporting the connecting portion is set on the elastic pad.
8. The speaker of claim 5 , further comprising a button circuit board disposed inside the housing, and a button switch corresponding to the button hole is set on the button circuit, wherein
when the button is pressed, the button contact point contacts and triggers the button switch.
9. The speaker of claim 1 , wherein the elastic pad and the rigid pad abut each other.
10. The speaker of claim 1 , wherein the elastic pad covers an outside of the button hole, and
prevents the button from moving relative to the button hole.
11. The speaker of claim 1 , wherein the housing includes an accommodating body and a cover, wherein a cavity that has an opening at one end of the accommodating body is set on the accommodating body and the cover is covered on the opening of the cavity to seal the cavity.
12. The speaker of claim 1 , wherein the at least one sound guiding hole includes a damping layer, the damping layer being configured to adjust the phase of the guided sound wave in the target region.
13. The speaker of claim 1 , wherein the guided sound wave includes at least two sound waves having different phases.
14. The speaker of claim 1 , wherein the at least one sound guiding hole includes two sound guiding holes located on the housing.
15. The speaker of claim 14 , wherein the two sound guiding holes are arranged to generate at least two sound waves having different phases to reduce a sound pressure level of the leaked sound wave having different wavelengths.
16. The speaker of claim 15 , 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.
17. The speaker of claim 1 , wherein the first guided sound wave and the second guided sound wave are transmitted to their corresponding sound guiding holes via different acoustic routes.
18. The speaker of claim 17 , wherein at least one of the different acoustic routes includes at least one of a lumen structure or a resonance cavity.