Formal:
* Tone of voice: This is the most common and general way to describe the sound of someone's voice.
* Vocal tone: This emphasizes the sound of the voice itself.
* Voice timbre: This is a more technical term referring to the unique quality of a voice.
* Vocal delivery: This focuses on the way someone uses their voice to communicate.
Informal:
* Voice inflection: This refers to the changes in pitch and volume that give a voice its character.
* Voice color: This is a poetic way to describe the unique sound of a voice.
* Voice quality: This is a broader term that encompasses all the characteristics of a voice.
* How someone sounds: This is a simple and direct way to describe the way someone speaks.
Specific Examples:
* "She spoke with a gentle tone of voice." (Formal)
* "His vocal tone was warm and inviting." (Formal)
* "The singer's voice timbre was rich and resonant." (Formal)
* "Her vocal delivery was powerful and engaging." (Formal)
* "He used a lot of voice inflection to emphasize his points." (Informal)
* "Her voice color was unique and beautiful." (Informal)
* "He has a very deep voice quality." (Informal)
* "She sounds very happy today." (Informal)
Ultimately, the best way to say "voice tone" or "of voice" depends on the specific context and what you want to emphasize.