Final answer:
Vocal quality refers to the unique characteristics of a voice, including its tone, texture, and emotional nuances, which make it distinctive.
Step-by-step explanation:
The characteristics of a voice such as shrill, nasal, raspy, breathy, booming, and so forth, are referred to as vocal quality.
Vocal quality encompasses the distinctive properties or timbre of a voice that make it unique and can include a variety of elements such as tone, texture, and the emotional nuances that a voice can convey.
These qualities can significantly affect how vocal sounds are perceived in various contexts of speech and singing.