Meanings of perfect articulation in English

This microphone produces in any good telephone perfect articulation in a loud and full tone.

With her perfect articulation, in which there was, however, no trace of bigwiggery, she answered:

By this method a more distinct and perfect articulation is gained, with one-half the labor of the other method.

They rang true as a bell, a perfect articulation of an instinct I had always felt but failed to make explicit.

At every step in the application of the method, the principles which underlie and govern perfect articulation, serve as the foundation of the instruction.