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;
a power source assembly configured to provide electrical power;
a controller configured to cause the speaker to generate sound; and
a Bluetooth low energy (BLE) module configured to establish communication between the speaker and a terminal device of a user.
2. The speaker of claim 1 , wherein the power source assembly, the controller, and the BLE module are disposed in the housing.
3. The speaker of claim 1 , wherein the BLE module is configured to transmit data from the speaker to the terminal device.
4. The speaker of claim 3 , wherein to transmit the data, the BLE module is configured to:
encode the data to be transmitted to the terminal device;
generate a BLE data packet based on the encoded data and attributes of the data;
modulate the BLE data packet onto a BLE channel; and
transmit the modulated BLE data packet to the terminal device through the BLE channel.
5. The speaker of claim 1 , wherein the BLE module is further configured to determine a location of the user.
6. The speaker of claim 5 , wherein to determine the location of the user, the BLE module is configured to:
scan position tags around the speaker;
obtain messages related to one or more detected position tags within a scanning window;
determine one or more parameters associated with the messages; and
calculate the location of the speaker based on the messages and the one or more parameters associated with the messages.
7. The speaker of claim 2 , further comprising a flexible circuit board including one or more bonding pads or one or more flexible wires.
8. The speaker of claim 7 , wherein the BLE module, the controller, and the transducer are connected to the power source assembly through the flexible circuit board.
9. The speaker of claim 1 , wherein the controller is further configured to control the power source assembly.
10. The speaker of claim 9 , wherein to control the power source assembly, the controller is further configured to:
receive state information of the power source assembly; and
generate an instruction to control the power source assembly based on the state information of the power source assembly.
11. The speaker of claim 10 , wherein the state information of the power source assembly includes at least one of an on/off state, state of charge, time for use, a charging time.
12. The speaker of claim 2 , wherein the controller is further configured to:
receive a sound signal from the user; and
generate a control instruction related to the sound signal to control the transducer.
13. The speaker of claim 1 , wherein the power source assembly includes a battery and a flexible circuit board.
14. The speaker of claim 13 , wherein the battery includes a body region and a sealing region, the sealing region being disposed between the flexible circuit board and the body region, and being connected to the flexible circuit board and the body region.
15. The speaker of claim 13 , wherein the flexible circuit board includes a first board and a second board.
16. The speaker of claim 15 , wherein the controller is connected to the BLE module based on the first board through external wires.
17. The speaker of claim 15 , wherein the controller is connected to the battery based on the second board through external wires.
18. The speaker of claim 14 , wherein the power source assembly further includes a hard circuit board disposed in the sealing region, the hard circuit board being provided with a protection circuit to protect the battery from overloading.
19. 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.
20. The speaker of claim 1 , wherein the guided sound wave includes at least two sound waves having different phases.