Bone conduction transducer array for providing audio
Embodiments relate to providing audio by focusing vibrations from an array of a plurality of bone conduction transducers to a cochlea of a user's ear. When bone conduction signals are received, bone conduction transducers of the array transmit vibrations to the cochlea of the user. A bone conduction signal generator generates the bone conduction signals, which may vary in amplitude and phase for different bone conduction transducers to amplify a level of vibrations at the cochlea of one ear while attenuating vibrations at another cochlea of another ear.
1. A head-mounted display (HMD) comprising:
a bone conduction signal generator configured to generate a first bone conduction signal and a second bone conduction signal;
a first bone conduction transducer coupled to the bone conduction signal generator, the first bone conduction transducer configured to contact a patch of skin in a first ear region of a user, and configured to transmit first vibrations responsive to receiving the first bone conduction signal, the first vibrations causing a level of vibrations at a target region in the first ear region; and
a second bone conduction transducer coupled to the bone conduction signal generator, the second bone conduction transducer configured to contact the patch of skin in the first ear region, and configured to transmit second vibrations responsive to receiving the second bone conduction signal, the second vibrations increasing the level of vibrations at the target region.
2. The HMD of claim 1 , wherein the first bone conduction transducer and the second bone conduction transducer are mounted to the HMD in a single line.
3. The HMD of claim 2 , wherein the single line is bent.
4. The HMD of claim 1 , wherein the first bone conduction transducer and the second bone conduction transducer are part of a plurality of bone conduction transducers mounted to the HMD in a circular pattern.
5. The HMD of claim 4 , wherein each of the plurality of bone conduction transducers are circular-shaped.
6. The HMD of claim 4 , wherein the plurality of bone conduction transducers are not circular-shaped and wherein the circular pattern is concentric to a circular-shaped bone conduction transducer.
7. The HMD of claim 1 , wherein the first bone conduction signal has at least one of a first amplitude or a first phase different than a second amplitude or a second phase, respectively, of the second bone conduction signal.
8. The HMD of claim 1 , further comprising:
a vibration sensor configured to detect the first vibrations; and
a calibration engine coupled to the vibration sensor to receive the detected first vibrations and coupled to the bone conduction signal generator, the calibration engine configured to:
generate calibration values using the detected first vibrations; and
provide the calibration values to the bone conduction signal generator, wherein the bone conduction signal generator generates a modified version of the first bone conduction signal by taking into account the calibration values.
9. The HMD of claim 1 , wherein the second vibrations do not increase another level of vibrations at a second ear region of the user.
10. The HMD of claim 1 , further comprising:
a third bone conduction transducer coupled to the bone conduction signal generator, the third bone conduction transducer configured to contact another patch of skin in a second ear region of the user; and
a fourth bone conduction transducer coupled to the bone conduction signal generator, the fourth bone conduction transducer configured to contact the other patch of skin in the second ear region, wherein vibrations transmitted by the third and fourth bone conduction transducers are attenuated at the first ear region.
11. A method of operating a head-mounted display (HMD), comprising:
generating a first bone conduction signal and a second bone conduction signal by a first bone conduction transducer;
providing the first bone conduction signal to a first bone conduction transducer;
transmitting first vibrations by the first bone conduction transducer responsive to receiving the first bone conduction signal, the first bone conduction transducer contacting a patch of skin in a first ear region of a user, the first vibrations causing a level of vibrations at a target region in the first ear region;
providing the second bone conduction signal to a second bone conduction transducer; and
transmitting second vibrations by the second bone conduction transducer responsive to receiving the second bone conduction signal, the second bone conduction transducer contacting the patch of skin in the first ear region, the second vibrations increasing the level of vibrations at the target region.
12. The method of claim 11 , wherein the first bone conduction transducer and the second bone conduction transducer are mounted to the HMD in a single line.
13. The method of claim 12 , wherein the single line is bent.
14. The method of claim 11 , wherein the first bone conduction transducer and the second bone conduction transducer are part of a plurality of bone conduction transducers mounted to the HMD in a circular pattern.
15. The method of claim 14 , wherein each of the plurality of bone conduction transducers are circular-shaped.
16. The method of claim 14 , wherein the plurality of bone conduction transducers are not circular-shaped and wherein the circular pattern is concentric to a circular-shaped bone conduction transducer.
17. The method of claim 11 , wherein the first bone conduction signal has at least one of a first amplitude or a first phase different than a second amplitude or a second phase, respectively, of the second bone conduction signal.
18. The method of claim 11 , further comprising:
detecting the first vibrations by a vibration sensor; and
receiving the detected first vibrations by a calibration engine;
generating, by the calibration engine, calibration values using the detected first vibrations; and
generating a modified version of the first bone conduction signal by taking into account the calibration values.
19. A system comprising:
a first bone conduction transducer contacting a patch of skin in a first ear region of a user;
a second bone conduction transducer contacting the patch of skin in the first ear region; and
a processor configured to:
generate a first bone conduction signal and a second bone conduction signal;
provide the first bone conduction signal to a first bone conduction transducer, the first bone conduction transducer transmitting first vibrations responsive to receiving the first bone conduction signal, the first vibrations causing a level of vibrations at a target region in the first ear region; and
provide the second bone conduction signal to a second bone conduction transducer, the second bone conduction transmitting second vibrations responsive to receiving the second bone conduction signal, the second vibrations increasing the level of vibrations at the target region.
20. The system of claim 19 , wherein the processor is further configured to:
receive the first vibrations detected by a vibration sensor;
generate calibration values using the detected first vibrations; and
generate a modified version of the first bone conduction signal by taking into account the calibration values.