The calibration of microphones

During the past few years, the subcommittee on fundamental sound measurements^∗ of the American Standards Association has been considering definitions and test procedure pertaining to the calibration of microphones. The following report is a result of its work. At a recent meeting of the sectional committee^∗ under which the subcommittee functions, it was voted to submit this work to interested scientific bodies for publication in their journals, with the thought of promoting constructive criticism and discussion.