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 to generate a guided sound wave, 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 the interference reducing a sound pressure level of the leaked sound wave in the target region; and
a Bluetooth low energy (BLE) component configured to establish communication between the speaker and a terminal device of a user.
2. The speaker of claim 1 , wherein the BLE component is configured to transmit data from the speaker to the terminal device.
3. The speaker of claim 2 , wherein to transmit the data from the speaker to the terminal device, the BLE component 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 associated with 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.
4. The speaker of claim 3 , wherein the attributes associated with the data include at least one of parameters for decoding the data, parameters for demodulating the data, a volume of the data, a tone of the data, or content of the data.
5. The speaker of claim 3 , wherein the encoded data is divided into multiple data segments, and to generate a BLE data packet based on the encoded data and attributes associated with the data, the BLE component is configured to:
for each of the multiple data segments, generate the BLE data packet based on the data segment and attributes associated with the data segment.
6. The speaker of claim 1 , wherein the BLE component is further configured to determine a location of the user.
7. The speaker of claim 6 , wherein to determine the location of the user, the BLE component 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
determine the location of the speaker based on the messages and the one or more parameters associated with the messages.
8. The speaker of claim 7 , wherein the position tags include at least one identifier indicating a position of a BLE device.
9. The speaker of claim 8 , wherein the BLE component is further configured to:
obtain messages including identifiers from BLE devices corresponding to multiple position tags;
determine a value of an identifier contained in each message;
compare the value with one or more preset values; and
identify the one or more detected position tags from the multiple position tags according to the comparison.
10. The speaker of claim 8 , wherein when the BLE component confirms that the messages are obtained from authorized BLE devices, the BLE component is further configured to record a radio parameter associated with each message.
11. The speaker of claim 10 , wherein the radio parameter includes a received signal strength indicator (RSSI) value or a bit error rate (BER).
12. The speaker of claim 11 , wherein a count of the messages is more than three, and to determine the location of the speaker based on the messages and the one or more parameters associated with the messages, the BLE component is further configured to:
rank the messages according to RSSI values associated with the messages;
identify messages corresponding to three highest RSSI values from the messages; and
determine the location of the speaker based on the identified messages and one or more parameters associated with the messages.
13. The speaker of claim 1 , wherein:
the housing includes a bottom or a sidewall; and
the at least one sound guiding hole is located on the bottom or the sidewall of the housing.
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 at least one of a tuning paper, a tuning cotton, a nonwoven fabric, a silk, a cotton, a sponge, or a rubber.
16. The speaker of claim 1 , wherein the guided sound wave is a superimposed sound wave including at least two guided sound waves having different phases.
17. The speaker of claim 16 , wherein the at least one sound guiding hole includes a first sound guiding hole and a second sound guiding hole located on the housing.
18. The speaker of claim 17 , wherein the leaked sound wave is a superimposed sound wave including a plurality of leaked sound waves with different wavelengths, the at least two guided sound waves include a first guided sound wave generated by the first sound guiding hole and a second guided sound wave generated by the second sound guiding hole, and the first guided sound wave and the second sound wave have different phases and are used to reduce the sound pressure level of the plurality of leaked sound waves with the different wavelengths.
19. The speaker of claim 1 , wherein:
the housing includes a bottom or a sidewall; and
the at least one sound guiding hole is located on the bottom or the sidewall of the housing.
20. The speaker of claim 1 , wherein a location of the at least one sound guiding hole is determined based on at least one of: a vibration frequency of the transducer, a shape of the at least one sound guiding hole, the target region, or a frequency range within which the sound pressure level of the leaked sound wave is to be reduced.