Related Clues:

• See 11-Down
• '___ good!'
• Silent movie's lack
• Pings and dings
• Measures the depth of
• Noises
• Auditory stimuli
• Bugs pick them up
• 'Thwack!' and 'Grrr...' e.g.
• Snap, crackle and pop
• Arms of the sea
• Heard things
• They're heard
• Squeaks and creaks
• Measures depth or quality at bottom of sea