Related Clues:

• Soft 'Hey!'
• Soft "ahem" alternative
• Library attention-getter
• "Can you keep a secret?" sound
• Wordless whisper
• Ultimate in vanity? Henry wears two pairs of glasses to call for attention
• Whispered version of ''Yoo-hoo!''
• "Hey" relative
• Sibilant "Yo!"
• Sound from a would-be test cheater
• Attractive sound?
• Sibilant 'Yo!'
• Whisper from a cheater, maybe
• Regularly pose with good person -- this might attract attention
• Quiet "Hey, you!"