Related Clues:

• Measures depth or quality at bottom of sea
• One hears that that's the way the whale goes down
• One hears that the channels are narow
• How one tells the depth of them by ear
• Finds how deep they are by ear
• They may be deep, and this is how one finds how deep
• Thus one finds how deep the noises are
• One hears that the waters are narrow with 31 across
• Sees how deep the notes are?
• They are an eerie thing, as this does
• Bangs or bonks, e.g
• Foley artist's output
• Buzz and bleep
• Auditory stimulants
• Diva who related How Life Is