SELF-CONTAINED DETECTION METHOD AND DEVICE
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Accused Products
Abstract
The detection device comprises a sensor, a power supply, an alarm and an acousto-electric transducer. The activated acousto-electric transducer receives an acoustic signal and emits an electrical signal representative of the acoustic signal. The detection device further comprises a means of recognizing a predefined acoustic signal according to the electrical signal emitted by the transducer and triggering an emission of a message by the alarm when the predefined acoustic signal is recognized. The acoustic-electric transducer is only activated at regular intervals. Preferably, the transducer also serves an alarm to emit the message when the predefined acoustic signal is recognized.
11 Citations
35 Claims
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1-17. -17. (canceled)
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18. A detection device, comprising:
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a sensor; a power supply; an alarm; an acousto-electric transducer only activated at time intervals to receive an acoustic signal and to emit an electrical signal representative of the acoustic signal; and a controller for recognizing a predefined acoustic signal according to the electrical signal emitted by the transducer and triggering an emission of a message by the alarm when the predefined acoustic signal is recognized. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35)
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33. A detection method utilizing a sensor, a power supply and an alarm, the method comprising the steps of:
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activating an acousto-electric transducer at time intervals; receiving an acoustic signal by the activated transducer; and recognizing a predefined acoustic signal and triggering an emission of a message by the alarm when said predefined signal is recognized.
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Specification