METHODS AND APPARATUS TO DETECT SPILLOVER

Disclosed examples include: determining periods of loudness in an audio signal by: determining whether a difference between a first amplitude at a first time and a second amplitude at a second time satisfies a loudness threshold; in response to the difference satisfying the loudness threshold, setting a loudness flag to a loud state corresponding to the second time, the second time occurring after the first time; determining whether a third amplitude at a third time after the second time satisfies a quiet threshold; in response to the third amplitude satisfying the quiet threshold, setting the loudness flag to a quiet state corresponding to the third time; and determining periods of loudness for the audio signal based on the states of the loudness flag at the second and third times; and indicating the audio signal as spillover based on the periods of loudness.