Audience measurement methods and systems for producing audience information of a media presentation. At least one embodiment includes a moveable apparatus comprising an audio capturing means for picking up audio from a media presentation distributed to an audience through at least one media rendering device to produce an audio signal, processing means for processing the audio signal to derive the content identification information, user interface means for entering the presence information of panel members, memory means to store the content identification information and the presence information, and communication means for transmitting the content identification information and the presence information for further processing to generate audience information.