Results of the world's fair hearing tests

A hearing test for musical tones formed part of the Bell System exhibit at the New York and San Francisco Fairs, and the test records obtained have made possible a study of the hearing of a large group of the United States population. The variation of hearing acuity with age and sex is described in considerable detail. Hearing is also related in lesser degree to other factors, such as place of residence, economic status, and race, and these relations are discussed.