A Voice and Ear for Telephone Measurements
A. H. Inglis, C. H. G. Gray, R. T. Jenkins · Bell System Technical Journal · 1932
An artificial voice and ear have been developed which are sufficiently close simulations of the real voice and ear in their principal physical attributes to justify their use in both shop and laboratory tests of telephone transmitters and receivers. The artificial voice and ear have certain advantages in that they can be exactly specified and reproduced and can be used in determining physical characteristics of instruments which are difficult or impossible to obtain with real voices and ears.