A device and method for desynchronizing a patient's neuronal brain activity involving a neuron population firing in a pathologically synchronized manner. The device includes a stimulation unit configured to generate an acoustic stimulation signal to stimulate the neuron population when the acoustic stimulation signal is aurally received by the patient. Furthermore, the acoustic stimulation signal has a first frequency and a second frequency, with the first frequency provided to reset the phase of the neuronal brain activity in a first sub-population of the stimulated neuron population, and the second frequency provided to reset the phase of the neuronal brain activity in a second sub-population of the stimulated neuron population.