Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed. An example system includes: interface circuitry; programmable circuitry; and instructions to program the programmable circuitry to: obtain audio of a media presentation; obtain ambient noise in an area associated with the media presentation; determine an intensity of a difference between the audio and the ambient noise; and determine an engagement level of an audience of the media presentation based on a duration the intensity satisfies a threshold value.

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to determine performance of audience measurement meters. An example apparatus disclosed herein is to cause an audio output device of a meter to emit an audio signal into an environment, the audio signal based on a test pattern including a first plurality of watermarks and cause an audio input device of the meter to collect data from the environment during emission of the audio signal. Additionally, the example apparatus is to determine whether a second plurality of watermarks decoded from the data match the first plurality of watermarks and based on a difference between the first plurality of watermarks and the second plurality of watermarks indicative of a fault, cause an alert to be transmitted to a device associated with an audience measurement company that issued the meter.

Abstract: An animal feeder with moat protection having a center food section with the outer periphery thereof being of a height above the outer periphery of the feeder, and having a moat surrounding the food section, thereby preventing crawling insects, and ants, from contaminating the food in the food section, bugs and ants not being able to traverse the moat. A water supply section is affixed onto the outer periphery of the moat, sometimes being a part of the moat with the water supply section being more shallow than the moat so that the animal can drink all of the water in the water supply section while leaving water in the moat.