Final answer:
The treble clef is used for notes that are higher in pitch. 'Intensity level or decibel' describes the loudness of sound, while 'pitch' refers to how high or low a sound is.
Step-by-step explanation:
The treble clef is used to indicate notes that are relatively high in pitch. When you are learning how to play the piano, the mnemonic "Every good boy does fine" can help you remember the notes E, G, B, D, and F for the lines of the treble clef. As for sound characteristics, the word or phrase used to describe the loudness of sound is intensity level or decibel. On the other hand, the term pitch refers to how high or low a sound is. These concepts are fundamental when organizing groups of singers, like how the New York Choral Society categorizes male singers by voice type, or when comparing the physical attributes such as height to voice pitch and variance.