15. In a system for converting an audio input, comprising words made up of various sounds in a spoken sequence, into a visible form, comprising a sequence of corresponding phonemes, said system comprising: at least one transducer for receiving and processing said audio input to derive at least one phoneme identification output; and vowel identification means for receiving and processing said audio input to provide vowel identification outputs; the improvement wherein said vowel identification means comprises a vowel scanner for scanning said audio input to obtain preliminary vowel identification outputs, and a vowel transducer for receiving and processing said audio input so as to provide an enabling signal selecting one of said preliminary vowel identification outputs, whereby to provide said vowel identification outputs of said vowel identification means.
15. In a system for converting an audio input, comprising words made up of various sounds in a spoken sequence, into a visible form, comprising a sequence of corresponding phonemes, said system comprising: at least one transducer for receiving and processing said audio input to derive at least one phoneme identification output; and vowel identification means for receiving and processing said audio input to provide vowel identification outputs; the improvement wherein said vowel identification means comprises a vowel scanner for scanning said audio input to obtain preliminary vowel identification outputs, and a vowel transducer for receiving and processing said audio input so as to provide an enabling signal selecting one of said preliminary vowel identification outputs, whereby to provide said vowel identification outputs of said vowel identification means. 22. In the system of claim 15, further comprising input synchronizer means connected to said at least one transducer and to said vowel identification means for receiving and synchronizing said at least one phoneme identification output and said vowel identification outputs, respectively, so as to provide said sequence of corresponding phonemes comprising said visible form.