where the western world aquired its standard tunning in the 1939 when the rockefeller foundation instituted to the first standard s institute standard tunning to a 440hz frequency and that was derived from military acustic warfare research that determined the most dissonant most stressful most psychosocially that virtually robotic stressful frequency the just ease it frequency even quote mass stereo head quote inducing frequency frecuency mass stereo head quote inducing frequency mass stereo head quote inducing frequency 