Real time monitoring of acoustic environments using ultrasound
First Claim
1. A method for real time monitoring of properties of an acoustic environment, the method comprising:
- causing production of a regular acoustic signal, the regular acoustic signal being within a human range of hearing;
causing production of an acoustic sensing signal superimposed over the regular acoustic signal, the acoustic sensing signal having a frequency in the ultrasonic range; and
analyzing a reflected acoustic signal based at least in part on the acoustic sensing signal to determine the properties of the acoustic environment, the reflected acoustic signal being a representation of the acoustic sensing signal reflected within the acoustic environment;
wherein the acoustic sensing signal is caused to be produced by at least one loudspeaker of a mobile device, the at least one loudspeaker being configured to produce ultrasonic range signals.
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Abstract
Systems and methods for real time monitoring of acoustic environment using ultrasound are provided. An example method includes causing production of an acoustic sensing signal. The acoustic sensing signal can be a continuously repeating ultrasonic signal. The method further includes receiving a reflected acoustic signal, the reflected acoustic signal being a representation of an acoustic signal reflected within the acoustic environment. The method further includes analyzing the reflected acoustic signal based at least in part on the acoustic sensing signal to determine properties of the acoustic environment. The acoustic sensing signal can be produced based on a pseudorandom binary sequence. Analyzing the reflected acoustic signal includes correlating the reflected acoustic signal and the acoustic sensing signal to determine a real time estimate of impulse response of the acoustic environment. The method further allows determining that the properties of the acoustic environment have changed.
32 Citations
17 Claims
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1. A method for real time monitoring of properties of an acoustic environment, the method comprising:
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causing production of a regular acoustic signal, the regular acoustic signal being within a human range of hearing; causing production of an acoustic sensing signal superimposed over the regular acoustic signal, the acoustic sensing signal having a frequency in the ultrasonic range; and analyzing a reflected acoustic signal based at least in part on the acoustic sensing signal to determine the properties of the acoustic environment, the reflected acoustic signal being a representation of the acoustic sensing signal reflected within the acoustic environment; wherein the acoustic sensing signal is caused to be produced by at least one loudspeaker of a mobile device, the at least one loudspeaker being configured to produce ultrasonic range signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for real time monitoring of properties of an acoustic environment, the system comprising:
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a processor; and a memory communicatively coupled with the processor, the memory storing instructions which when executed by the processor perform a method comprising; causing production of an acoustic sensing signal, the acoustic sensing signal having a frequency in the ultrasonic range; and analyzing a reflected acoustic signal based at least in part on the acoustic sensing signal to determine the properties of the acoustic environment, the reflected acoustic signal being a representation of the acoustic sensing signal reflected within the acoustic environment; wherein the acoustic sensing signal is caused to be produced by at least one loudspeaker of a mobile device, the at least one loudspeaker being configured to produce ultrasonic range signals, wherein the at least one loudspeaker is further configured to produce a regular acoustic signal, the regular acoustic signal being within a human range of hearing, and wherein the acoustic sensing signal is superimposed over the regular acoustic signal. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A non-transitory computer-readable storage medium having embodied thereon instructions, which when executed by one or more processors, perform steps of a method, the method comprising:
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causing production of a regular acoustic signal, the regular acoustic signal being within a human range of hearing; causing production of an acoustic sensing signal superimposed over the regular acoustic signal, the acoustic sensing signal having a frequency in the ultrasonic range; and analyzing a reflected acoustic signal based at least in part on the acoustic sensing signal to determine the properties of the acoustic environment, the reflected acoustic signal being a representation of the acoustic sensing signal reflected within the acoustic environment; wherein the acoustic sensing signal is caused to be produced by at least one loudspeaker of a mobile device, the at least one loudspeaker being configured to produce ultrasonic range signals.
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Specification