Methods, apparatus, and machine-readable storage media to monitor media presentations are disclosed. A disclosed example apparatus includes a locator to compare a location of a mobile device with a set of reference locations at which audio monitoring is to be performed. The disclosed example apparatus further includes an audio receiver to enable a microphone of the mobile device to collect audio for media monitoring when (1) the location of the mobile device corresponds to a first one of the reference locations and (2) a media presentation monitor at the first one of the reference locations indicates a likelihood of media being presented at the first location satisfies a threshold. In some disclosed examples, the audio receiver of the example apparatus is to disable the microphone from collecting audio for media monitoring when the location of the mobile device does not correspond to any of the reference locations.

An example apparatus to monitor media that is presented via a mobile device includes: an application monitor to determine when media presentation software is being executed by the mobile device; and a metering information collector to collect at least one of a signature or a code of the media presented by the media presentation software based on the media presentation software being executed by the mobile device.

An example apparatus to monitor media that is presented via a mobile device includes: an application monitor to determine when media presentation software is being executed by the mobile device; and a metering information collector to collect at least one of a signature or a code of the media presented by the media presentation software based on the media presentation software being executed by the mobile device.

Methods and apparatus to determine a state of a media presentation device are disclosed. Example disclosed methods include generating a first set of weighted coefficients based on first audio received by first and second microphones at a first time. Example disclosed methods include generating a second set of weighted coefficients based on second audio received by the first and second microphones at a second time after the first time. Example disclosed methods include comparing the first set of coefficients and the second set of coefficients to generate a similarity value. Example disclosed methods include, when the similarity value satisfies a threshold, determining that the media presentation device is in a first state. Example disclosed methods include, when the similarity value does not satisfy the threshold, determining that the media presentation device is in a second state.

Methods and apparatus to determine a state of a media presentation device are disclosed. Example disclosed methods include generating a first set of weighted coefficients based on first audio received by first and second microphones at a first time. Example disclosed methods include generating a second set of weighted coefficients based on second audio received by the first and second microphones at a second time after the first time. Example disclosed methods include comparing the first set of coefficients and the second set of coefficients to generate a similarity value. Example disclosed methods include, when the similarity value satisfies a threshold, determining that the media presentation device is in a first state. Example disclosed methods include, when the similarity value does not satisfy the threshold, determining that the media presentation device is in a second state.

A system and method for remotely verifying images shown on an electronic display is provided. A processor may direct a screen capture device to take a screen capture of the image currently shown on the electronic display. The screen capture may be stored on an electronic storage device and may be transferred to a networked database via a network connection device. A client may be able to access the screen captures through a user interface in connectivity with the networked database.

Methods, apparatus, systems and articles of manufacture to update audio sensor configuration are disclosed. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to: in response to detection of an update to audio sensor configuration, identify a plurality of potential audio sensor configurations to be used to receive audio, select respective ones of the identified potential audio sensor configurations for testing, determine signal-to-noise ratios corresponding to each of the selected ones of the potential audio sensor configurations, select the greatest signal-to-noise ratio of the signal-to-noise ratios, compare the greatest signal-to-noise ratio value and a noise ratio change threshold, and in response to the selected greatest signal-to-noise ratio value exceeding the noise ratio change threshold, update a configuration memory to cause use of the potential audio sensor configuration corresponding to the selected greatest signal-to-noise ratio.

Methods, apparatus, systems and articles of manufacture to update audio sensor configuration are disclosed. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to: in response to detection of an update to audio sensor configuration, identify a plurality of potential audio sensor configurations to be used to receive audio, select respective ones of the identified potential audio sensor configurations for testing, determine signal-to-noise ratios corresponding to each of the selected ones of the potential audio sensor configurations, select the greatest signal-to-noise ratio of the signal-to-noise ratios, compare the greatest signal-to-noise ratio value and a noise ratio change threshold, and in response to the selected greatest signal-to-noise ratio value exceeding the noise ratio change threshold, update a configuration memory to cause use of the potential audio sensor configuration corresponding to the selected greatest signal-to-noise ratio.

A system and method for broadcast response generally employing RDS, DARC, or similar technology is provided, including a method for responding to a broadcast comprising extracting an event identifier from a broadcast signal; detecting a response by a user to the broadcast signal; polling a communications device to determine a user identifier; and communicating the event identifier and the user identifier when the user response is detected.

A system and method for broadcast response generally employing RDS, DARC, or similar technology is provided, including a method for responding to a broadcast comprising extracting an event identifier from a broadcast signal; detecting a response by a user to the broadcast signal; polling a communications device to determine a user identifier; and communicating the event identifier and the user identifier when the user response is detected.