"This hearing test is being given to all the pupils of the class by using the Audiometer A-1 with its battery of ear phones." (p.52) This photograph was published in the Report of Progress Birmingham Public Schools September 1, 1921 to August 31, 1931 (Birmingham, Ala. 1931)
Birmingham Board of Education Collection, Archives Department (source)
Birmingham Board of Education (publisher)
Birmingham Board of Education (Ala.) (creator)
1931