Possible Clues:

• Relating to the sounds of spoken language
• One's taken in by the modulated pitch of speech
• (Spelling) as pronounced
• Sound based
• Relating to speech sounds
• Like spelling that teaches pronunciation
• Representing what's said in pitch one composed
• Quietly sharpen habitual response of spoken words
• Describing sounds of one pitch in broadcast
• Apt word spelled out by the first letters of eight answers in this puzzle