Related Clues:

• "Oh wow!"
• Checkup sound
• Reaction to fireworks
• "Wow!"
• Delighted exclamation
• Sound from a hot tub
• Audible admiration
• Aah partner
• "I'm impressed!"
• Crowd's gasp
• Sound of amazement
• 'Isn't that pretty!'
• Fireworks sound
• "Amazing!"
• Awesome!