Amplitude is measured using the decibel (dB).
Any sound above 85 dB can cause human hearing loss;
a 140-dB sound can actually cause ear pain!
 
SOUND/AMPLITUDE
• Near total silence/0 dB
• Rustling leaves/10 dB
• A whisper/15 to 30 dB
• Normal conversation/60 dB
• Busy street traffic/70 dB
• A vacuum cleaner/80 dB
• A scream/80 dB
• A lawnmower/90 dB
• An orchestra/98 dB
• Thunder/100 dB
• Radio headphones at maximum/100 dB
• A car horn/110 dB
• A baby's cry/115 dB
•A rock concert/120 dB
• A jet engine/120 dB
• A gunshot or firecracker/140 dB