Related Clues:

• Stereotypical love-at-first-sight sound
• Air-conditioning sound
• Continuous murmur from Hard Right splitting corporation
• May sounds with a closed mouth
• Tap idly with the fingers
• Sing with one's mouth closed
• Sound of little feet (3 words)
• Not quite sing
• Drum starter?
• Hard liquor after time creates dull whine
• Vocalize on a kazoo
• Play idly, as a guitar
• Sing with a closed mouth
• Smell and sound of bees
• Smooth machinery sound