Two students conduct a hearing test. The back of the photo reads: "Demonstrating the uses of the Puretone Machine." The Puretone Machine was a machine which tested hearing using a puretone standard.
Students; Puretone Machine; Hearing Test; College students; Audiometry; Hearing levels - Testing; Men; Women; Clothing and dress; Handbags
North Dakota--Grand Forks; North Dakota
University of North Dakota
Elwyn B. Robinson Department of Special Collections, Chester Fritz Library, University of North Dakota