| A | B |
|---|
| infrasonic | Having a sound so low that people cannot hear it |
| throbbing | Beating or vibrating with a steady rhythm |
| amplified | To increase (voltage, current, or power) in magnitude or strength |
| melody | A series of musical tones |
| choruses | Parts of a song that are repeated after each verse |
| vibrations | Slight, rapid motion of a substance back and forth |
| tame | Changed from the wild state so as to become useful and obedient to human beings |
| conversations | Exchanges of observations, opinions, or ideas |
| improvise | To compose, recite, play, or sing without preparation |
| migrated | To pass from one region or climate to another usually on a regular schedule for feeding or breeding |
| severe | Strict in judgment, discipline, or government |
