Loudness Balance Study of Selected Audiometer Earphones

摘要

The report contains the characteristics of three different configurations of Telephonics TDH-39 audiometer earphones and a newer design, the TDH-49 earphone, as determined by loudness balance on 12 human subjects. The TDH-39 earphones were ones used for determining auditory threshold in the Health Examination Surveys of 1960-1965. It also describes the equipment and general experimental design used in the study.