Methods and apparatus to determine engagement levels of audience members

A method performed by a computing system of an audience measurement entity, the method comprising:

• obtaining media identification data from an audience measurement device via a network, the media identification data corresponding to media presented by a television within a media exposure environment, the media identification data determined based at least in part on an audio signature of the media, the audio signature generated by the audience measurement device;
• obtaining an engagement level of an audience member from the audience measurement device via the network, the engagement level including an indication of whether a head of the audience member is oriented toward the television, the indication determined by the audience measurement device based on detection of the head in an image of the media exposure environment by the audience measurement device, the image captured while the media is presented by the television;
• and
• compiling the media identification data and the engagement level with media identification data and engagement levels associated with other audience members from other media exposure environments to generate an engagement level rating, the engagement level rating representative of engagement with the media by a population of interest.

A computing system of an audience measurement entity for compiling audience engagement levels for a plurality of media exposure environments, the computing system comprising:

• network interface circuitry to:
• obtain media identification data from a plurality of audience measurement devices via a network, respective portions of the media identification data corresponding to media presented within respective ones of the media exposure environments, the respective portions of the media identification data determined based at least in part on corresponding audio signatures of the media;
• and
• obtain engagement levels from respective ones of the plurality of audience measurement devices via the network, the engagement levels based on whether one or more heads of one or more audience members at a corresponding one of the media exposure environments are oriented toward a television at the corresponding one of the media exposure environments, the engagement levels determined by corresponding ones of the audience measurement devices based on respective images of the corresponding media exposure environments, the images captured while the media is being presented;
• machine readable instructions;
• and
• processor circuitry to execute the machine readable instructions to compile the media identification data and engagement levels for the plurality of media exposure environments to generate an engagement level rating, the engagement level rating representative of engagement with the media by a population of interest.