List of homophone indicators

This is a non-exhaustive list of homophone indicators.
 * aloud
 * announced
 * articulated
 * audibly
 * broadcast
 * conversational
 * hearing
 * listen
 * on the radio
 * on the telephone
 * orally
 * outspoken
 * pronounced
 * read aloud
 * reportedly
 * said
 * say
 * sound
 * spoken
 * told
 * utter
 * verbal
 * vocal