Acoustic-based temperature sensing in telephones
First Claim
Patent Images
1. A communication device, comprising:
- a speaker;
a microphone disposed at a distance from said speaker; and
a processor connected to said speaker and said microphone and operatively arranged for determining ambient temperature by causing a test sound to be played on said speaker, measuring a transit time of the test sound from said speaker to said microphone, and calculating an ambient temperature of an environment in which the communication device is disposed from the measured transit time.
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Abstract
A communication device includes a speaker, a microphone, and a processor connected to the speaker and the microphone. The processor is arranged for calculating ambient temperature by playing a test sound on the speaker, measuring a transit time of the test sound from the speaker to the microphone, and determining the ambient temperature from the measured transit time. A method of calculating ambient temperature by using a communications device having a speaker, a microphone and a processor is also disclosed. The method can be used for monitoring ambient temperatures of machinery and for detecting fire conditions.
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Citations
39 Claims
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1. A communication device, comprising:
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a speaker;
a microphone disposed at a distance from said speaker; and
a processor connected to said speaker and said microphone and operatively arranged for determining ambient temperature by causing a test sound to be played on said speaker, measuring a transit time of the test sound from said speaker to said microphone, and calculating an ambient temperature of an environment in which the communication device is disposed from the measured transit time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for calculating ambient temperature of a communication device having a speaker and a microphone disposed from the speaker, comprising the steps of:
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playing a test sound on the speaker;
measuring a transit time of the test sound from the speaker to the microphone; and
calculating an ambient temperature based on the measured transit time. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A communication device, comprising:
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a speaker;
a first microphone disposed at a first distance from said speaker;
a second microphone disposed at a second distance from said speaker; and
a processor connected to said speaker and said first and second microphones and operatively arranged for determining ambient temperature by causing a test sound to be played on said speaker, measuring the time between reception of the test sound at said first microphone and reception of the test sound at said second microphone, and calculating an ambient temperature of an environment in which the communication device is disposed from the measured time.
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39. A method for calculating ambient temperature of a communication device having a speaker, a first microphone disposed at a first distance from the speaker, and a second microphone disposed at a second distance from the speaker, comprising the steps of:
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playing a test sound on the speaker;
measuring the time between reception of the test sound at the first microphone and reception of the test sound at the second microphone; and
calculating an ambient temperature based on the measured time.
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Specification