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;
at least two sound guiding holes located on the housing and configured to guide the sound wave inside the housing through the at least two sound guiding holes to an outside of the housing, wherein the at least two sound guiding holes include a first sound guiding hole and a second sound guiding hole located on different side walls of the housing, and the sound wave exiting the first sound guiding hole has a different phase from the sound wave exiting the second sound guiding hole; and
a Bluetooth low energy (BLE) component configured to:
establish communication between the speaker and a terminal device of a user;
obtain messages related to one or more detected position tags around the speaker; and
determine a location of the speaker based on the messages, wherein to determine the location of the speaker, the BLE component is configured to:
detect one or more position tags around the speaker;
obtain the messages related to the 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.
2. The speaker of claim 1 , wherein:
the housing includes a bottom and a first side wall; and
the first sound guiding hole and the second sound guiding hole are located on the bottom and the first side wall of the housing, respectively.
3. The speaker of claim 1 , wherein the housing includes a specific side wall where no sound guiding hole is located, and a distance from the first sound guiding hole to the specific side wall of the housing is different from a distance from the second sound guiding hole to the specific side wall of the housing.
4. The speaker of claim 1 , wherein the BLE component is configured to transmit data from the speaker to the terminal device.
5. The speaker of claim 4 , 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.
6. The speaker of claim 5 , 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.
7. The speaker of claim 5 , 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.
8. The speaker of claim 1 , 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 each of the first sound guiding hole or the second sound guiding hole includes a damping layer, the damping layer being configured to adjust the phase of the guided sound wave of the corresponding sound guiding hole.
14. The speaker of claim 13 , 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.
15. The speaker of claim 1 , wherein locations of the at least two sound guiding holes are determined based on at least one of: a vibration frequency of the transducer, shapes of the at least two sound guiding holes, or a count of the at least two sound guiding holes.
16. 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;
at least two sound guiding holes located on the housing and configured to guide the sound wave inside the housing through the at least two sound guiding holes to an outside of the housing, wherein the at least two sound guiding holes include a first sound guiding hole and a second sound guiding hole, the first sound guiding hole and the second sound guiding hole are located on different side walls of the housing, and the sound wave exiting the first sound guiding hole has a different phase from the sound wave exiting the second sound guiding hole; and
a Bluetooth low energy (BLE) component configured to:
establish communication between the speaker and a terminal device of a user;
obtain messages related to one or more detected position tags around the speaker; and
determine a location of the speaker based on the messages, wherein to determine the location of the speaker, the BLE component is configured to:
detect one or more position tags around the speaker;
obtain the messages related to the 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.
17. The method of claim 16 , wherein:
the housing includes a bottom and a first side wall; and
the first sound guiding hole and the second sound guiding hole are located on the bottom and the first side wall of the housing, respectively.
18. The method of claim 16 , wherein the housing includes a specific side wall where no sound guiding hole is located, and a distance from the first sound guiding hole to the specific side wall of the housing is different from a distance from the second sound guiding hole to the specific side wall of the housing.