Migraine is a common. recurrent and disabling primary headache disorder with a genetic component which affects up to 20 % of the population. One third of all patients with migraine experiences aura. a focal neurological disturbance that manifests itself as visual. https://www.roneverhart.com/Turbosound-TS-18SW700-8A-18-Low-Frequency-Loudspeaker-p31480/