| 摘要 |
An audience measurement system for monitoring programmes viewed and/or listened to by one or more members of a sample household, the system comprising a fixed monitoring device 4 and a portable monitoring device 6, wherein: the fixed monitoring device 4 is associated with a particular media device 3, in the household's home, and comprises a monitoring mechanism 11 for monitoring a received broadcast signal and/or a state of the media device 3 to extract information enabling a received programme and/or station to be identified; and a first communicator 15 for communicating with the portable monitoring device 6; and wherein the portable monitoring device 6, which can be carried by a user, comprises a receiver 21 for receiving sound of a programme emitted by any nearby media device; a data extractor 22 for extracting data from the received sound to enable a programme and/or station to be identified; and a second communicator 25 for communicating with the fixed monitoring device 4; wherein either the first 15 or the second 25 communicator is operable to transmit a device present signal in the vicinity of its respective monitoring device, and the second 25 or the first 15 communicator is operable to detect the said signal, such that the first 15or second 25 communicator is operable to detect when the portablemonitoring device 6 is in the vicinity of the fixed monitoring device 4.
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