Acoustic Ranging
First Claim
1. A method for a first device, the method comprising:
- emitting a first acoustic signal;
receiving the first acoustic signal at a first time;
receiving a second acoustic signal at a second time, the second acoustic signal emitted by a second device;
ascertaining a first value reflecting a difference between the first time and the second time;
receiving from the second device at least a second value reflecting a difference between when the second device received the first acoustic signal and the second acoustic signal; and
determining a distance between the first device and the second device responsive to at least the first value and the second value.
2 Assignments
0 Petitions
Accused Products
Abstract
Acoustic ranging may involve determining a distance between a first device and at least one other device using one or more acoustic signals. In an example embodiment, a first device emits a first acoustic signal and then receives the first acoustic signal at a first time. The first device also receives a second acoustic signal at a second time, with the second acoustic signal having been emitted by a second device. The first device ascertains a first value that reflects a difference between the first time and the second time. Responsive to at least the ascertained first value, the first device determines a distance between the first device and the second device.
90 Citations
20 Claims
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1. A method for a first device, the method comprising:
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emitting a first acoustic signal; receiving the first acoustic signal at a first time; receiving a second acoustic signal at a second time, the second acoustic signal emitted by a second device; ascertaining a first value reflecting a difference between the first time and the second time; receiving from the second device at least a second value reflecting a difference between when the second device received the first acoustic signal and the second acoustic signal; and determining a distance between the first device and the second device responsive to at least the first value and the second value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. One or more processor-accessible storage media comprising processor-executable instructions that, when executed, direct a first device to perform acts comprising:
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emitting a first acoustic signal; receiving the first acoustic signal at a first time; receiving a second acoustic signal at a second time, the second acoustic signal emitted by a second device; ascertaining a first value reflecting a difference between the first time and the second time; receiving from the second device at least a second value reflecting a difference between when the second device received the first acoustic signal and the second acoustic signal; and determining a distance between the first device and the second device responsive to at least the first value and the second value.
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17. A first device comprising:
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at least one speaker; at least one microphone; an actuator to emit, in conjunction with the speaker, a first acoustic signal; a sensor to receive, in conjunction with the microphone, the first acoustic signal at a first time and a second acoustic signal at a second time, the second acoustic signal emitted by a second device; and a calculator to ascertain a first value reflecting a difference between the first time and the second time and to determine a distance between the first device and the second device responsive to at least the first value. - View Dependent Claims (18, 19, 20)
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Specification