Automatic device for recording, correcting and analysing articulation results
14 January 1932
The device described obviates the clerical work in connection with articulation tests. Cards bearing the various test sounds, vowel-consonant, consonant-vowel, etc., and the cards presented to the caller prepare a circuit to a telephone call meter at the receiving end. If the receiver correctly recognises the sound uttered, he presses a key which completes the circuit to the telephone call meter. If he mistakes the sound, the depression of the wrong key is without effect and no record is made. In this way the percentage articulation is read at the end of the test from the battery of meters provided.