RichThesaurus
at the top of one's voice
vs
faintly
at the top of one's voice
prep
Of vocal sounds: very loudly; as loudly as possible.
faintly
adv
In a faint manner; very quietly or lightly.
How often have the words
at the top of one's voice
and
faintly
occurred in a corpus of books?
(source:
Google Ngram Viewer
)