Why does “an Arabic Qur’an” not entail that every reciter’s voice is eternal?

The Uncreated Qur’an: Divine Speech, Wording, Meaning and Attribution

• The Arabic expression must itself be necessary in existence
• Every Arabic term has one acoustic existence independent of its reciters
• Arabic expression and human voices are distinct from the attribute’s ontological status
• The sequence of words forms the temporal parts of the divine attribute