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US 10,257,606 B2Granted
Fast determination of a frequency of a received audio signal by mobile phone
AssigneeCubic Corporation
InventorTom Vilhelmsen
Life of this patent
Estimating the term…
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AssigneeCubic Corporation
InventorTom Vilhelmsen
Estimating the term…
Systems, methods, and devices for determining a frequency of a received audio signal. A device may include a microphone, a speaker, and a processor configured to perform operations including receiving, using the microphone, a first audio signal having a predetermined frequency. The operations may also include, for each test frequency of a plurality of test frequencies and for each test phase of a plurality of test phases, generating a second audio signal having the test frequency and the test phase, outputting, using the speaker, the second audio signal, receiving, using the microphone, a combined audio signal being a combination of the first audio signal and the second audio signal, determining an amplitude of the combined audio signal, and determining that the predetermined frequency is within a threshold range of the test frequency when the amplitude of the combined audio signal is below a threshold.
A portable electronic device comprising:
A method comprising:
A non-transitory computer-readable medium comprising instructions that, when executed by a processor, cause the processor to perform operations comprising:
Dependencies are inferred from the claim text.