Articulation and intelligibility of a telephone circuit
14 January 1929
The paper describes a theoretical study of the quantities that can be used as a measure of the transmission quality of a telephone circuit, and formulaelig are developed for determining the relation between the different quantities. The following applications of the theory are discussed, and actual examples are given: (1) calculation of the relation between various quantities; (2) comparison of results taken with different testing techniques; (3) comparison of results in different languages; (4) determination of a suitable quantity as a criterion of transmission quality: (5) development of testing technique for the measurement of various quantities.