Patent ID: 8531915

Claim:
A method of detecting a remote object concealed by a subject using a portable acoustic/ultrasonic detection system, the method comprising: collecting, by a portable acoustic/ultrasonic detection system, reference data from a reference spot on a person located from 2 to 20 feet from the detection system, wherein said detection system comprises: a signal generator configured to output an electrical signal; at least one acoustic/ultrasonic transducer configured to convert the electrical signal into an acoustic/ultrasonic signal, transmit the acoustic/ultrasonic signal, receive a reflected acoustic/ultrasonic signal from an object and convert the reflected acoustic/ultrasonic signal into a received electrical signal, wherein the transducer is at least one of an air-coupled transducer and an electromagnetic acoustic transducer; an acoustic/ultrasonic antenna aperture operatively connected to the transducer and configured to focus the transmitted acoustic/ultrasonic signal to create a narrow beam the target area; a processor configured to extract object information from the received electrical signal; and collecting, by the portable acoustic/ultrasonic detection system, object data from an object hidden on a different spot on the person; comparing the reference data to the object data; and determining that the person is hiding an object based on the comparison.