Ultrasonic audience measurement system and method

Details Ultrasonic audience measurement system and method Ultrasonic audience measurement system and method

1986-01-23

1987-02-17

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

367104, 358 84, G01S 1588

Patent

active

046445099

ABSTRACT:
Method and apparatus for identifying a number of people in a monitored area wherein a first reflected ultrasonic wave map of the monitored area is collected that includes background objects. A second reflected ultrasonic wave map of the monitored area is collected when people may be present in the monitored area. The first collected background defining map is subtracted from the second collected map to obtain a resulting map. The resulting map is processed to identify clusters having a minimum intensity. A cluster size of the thus identified clusters is utilized to identify clusters corresponding to people. The ultrasonic detecting method and apparatus is utilized with a wave signal receiver for identifying an audience composition of the receiver and determining the viewing habits of the public.

REFERENCES:
patent: 4382291 (1983-05-01), Nakauchi
patent: 4578700 (1986-03-01), Roberts et al.

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