An expert or specialist in the prognosis and treatment of mentally processed sounds that are imaginary: Nancy was admitted to the psychiatric ward of the hospital under the care of the psycho-acoustician who was familiar with patients with imaginary perceptions of sounds.

According to a psychoacoustician, most people perceive airplane noise as if it were 10 dB greater than a similar noise that is made by a train, or ten times noisier than a train even when the noise levels of both are objectively the same.