Articulation is hampered by occasional lazy, slurred or chopped enunciation. Mispronunciations interfere with the listener's understanding of the message. The speaker lacks vocal variety thus having a somewhat monotonous delivery which hampers the listener's reception of the message. Moments of apparent reciting, reading or referring to notes occasionally interferes with delivery. Vocalized pauses are distracting.
Volume is either too loud or too soft for the listener or the occasion.
Poor articulation or mispronunciation obstructs communication with the listener. The speaker sounds uninterested or bored with the message of in communicating successfully with the listener. Vocalized pauses obstruct communication with the listener. Any deviation from standard spoken English seems to be chosen for an appropriate reason. The speaker's dialect should not interfere with the communication process.