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; and
a voice control device configured to control the speaker based on a voice control instruction received from a user.
2. The speaker of claim 1 , wherein the voice control device comprises:
a receiving unit configured to receive the voice control instruction from the user;
a processing unit configured to generate an instruction signal based on the voice control instruction;
a recognition unit configured to identify whether the instruction signal matches a preset signal; and
a control unit configured to control the speaker based on the instruction signal and a matching result.
3. The speaker of claim 2 , wherein the receiving unit includes one or more microphones or a microphone array.
4. The speaker of claim 3 , wherein the one or more microphones or the microphone array are disposed in the speaker or in a device connected to the speaker.
5. The speaker of claim 2 , wherein the processing unit is further configured to:
receive the voice control instruction from the receiving unit;
generate the instruction signal based on the voice control instruction; and
send the instruction signal to the recognition unit.
6. The speaker of claim 2 , wherein the processing unit is further configured to perform a denoise process on the voice control instruction before generating the instruction signal based on the voice control instruction.
7. The speaker of claim 2 , wherein to identify whether the instruction signal matches a preset signal, the recognition unit is further configured to:
perform a speech recognition process or a semantic recognition process on the instruction signal.
8. The speaker of claim 2 , wherein the preset signal is previously input by the user and saved in the speaker.
9. The speaker of claim 2 , wherein the preset signal is generated according to a preset voice instruction.
10. The speaker of claim 2 , wherein in response to identifying that the instruction signal matches the preset signal, the recognition unit is further configured to send the matching result to the control unit.
11. The speaker of claim 2 , wherein in response to identifying that the instruction signal matches the preset signal, the control unit is configured to execute the voice control instruction automatically.
12. The speaker of claim 2 , wherein the voice control device further includes a storage module configured to store the preset signal.
13. The speaker of claim 1 , wherein the user is a first person wearing the speaker or a second person proximate to or interacting with the first personnel.
14. 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.
15. The speaker of claim 14 , wherein the damping layer includes tuning paper, tuning cotton, nonwoven fabric, silk, cotton, sponge, or rubber.
16. The speaker of claim 1 , wherein the guided sound wave includes at least two sound waves having different phases.
17. The speaker of claim 16 , wherein the at least one sound guiding hole includes two sound guiding holes located on the housing.
18. The speaker of claim 17 , wherein the two sound guiding holes are arranged to generate the at least two sound waves having different phases to reduce the sound pressure level of the leaked sound wave having different wavelengths.
19. The speaker of claim 1 , 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.
20. The speaker of claim 15 , 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.