This sound is from Attention! Soundboard

ADHD is a neurodevelopmental disorder characterised by excessive amounts of inattention, hyperactivity, and impulsivity that are pervasive, impairing in multiple contexts, and otherwise age-inappropriate. ADHD is diagnosed approximately twice as often in boys than in girls, and 1.
See also: Attention, Attention!, Attention Attention, At attention, Attention Attention (song), and Attention Tour.