1. A device for desynchronizing a patient's neuronal brain activity involving a neuron population firing in a pathologically synchronized manner, the device comprising: a stimulation unit configured to generate an acoustic stimulation signal comprising at least a first tone and a second tone; wherein the first tone is provided to shift the phase of the neuronal brain activity of a first subpopulation of the neuron population relative to the phase of the neuronal brain activity of a second subpopulation of the neuron population when the first tone is acoustically received by the patient; wherein the second tone is provided to shift the phase of the neuronal brain activity of the second subpopulation relative to the phase of the neuronal brain activity of the first subpopulation when the second tone is acoustically received by the patient; and wherein the acoustic stimulation signal desynchronizes the stimulated neuron population.