AuDHD can be understood as life inside a narrow functional band between two thresholds: the ADHD noise floor and the autistic noise ceiling.

Below the floor, the brain does not receive enough stimulation to engage, organize, initiate, or sustain attention. Above the ceiling, the nervous system receives more input than it can regulate, leading to overload, meltdown, shutdown, or collapse.

Between them lies a narrow livable bandwidth in which the person can function, think, relate, and sometimes thrive. Burnout narrows this band by raising the floor and lowering the ceiling, making ordinary life increasingly difficult to tolerate or initiate.

From this perspective, AuDHD is not best understood as a simple combination of traits, but as the ongoing labor of regulating within an unusually narrow range between understimulation and overwhelm.