Sound Volume

A sound is louder when the vibrations are ________________.

• smaller

• bigger

• softer

A ________________ is the unit we use to measure the volume of sound.

• distance

• time

• decibel

Can we measure how loud or soft a sound is?

• yes

• no

The _________________ of s sound is how loud and soft the sound is.

• distance

• time

• volume

What sound levels are safe?

• below 85 decibels

• below 90 decibels

• above 85 decibels

What causes permanent hearing loss?