Obstruction of Branch of Retinal Vessels

Longitudinal Study of Human Hearings: Its Relationship to Noise and Other Factors. 3. Results from the First Five Years

“…There is ample evidence this procedure lacks specificity and sensitivity, and that it is unreliable Fletcher, 1926, 1928;Rodin, 1927Rodin, , 1930Laurer, 1928;Burnap, 1929;Freund, 1932;Rowe and if Drury, 1932;Partridge and MacLean, 1933;Rossell, 1933). Ciocco and Palmer (1941) did, however, obtain air conduction thresholds for about 1400 of their group (700 with hearing losses and 700 with normal hearing based on testing with the phonographic audiometer).…”