Sound Waves and Human Hearing Quiz

What are sound waves?

• Electrical signals that travel through the ear canal

• Light waves that travel through solids

• Particles that travel through the air

• Vibrations that pass through the molecules of a medium

What are compressions in a sound wave?

• Regions where the particles are furthest apart

• Regions where the sound wave stops

• Regions where the vibrating particles are closest together

• Regions where the particles are all spread out

In which type of medium does sound travel the fastest?

• Vacuum

• Solids

• Liquids

• Gases

What happens to the wavelength as sound speeds up in higher density mediums?

• It remains the same

• It decreases

• It increases

• It becomes shorter

What part of the ear converts vibrations into electrical signals?

• Ear canal

• Cochlea

• Eardrum

• Semicircular canals

What determines which frequencies we can hear?

• Size and shape of all ear structures

• Size and shape of the cochlea

• Size and shape of the ear canal

• Size and shape of the eardrum

What is the normal range of frequencies that humans can hear?

• 10 Hz to 15,000 Hz

• 20 Hz to 20,000 Hz

• 30 Hz to 30,000 Hz

• 25 Hz to 25,000 Hz

Why does the range of our hearing normally decrease as we get older?

• Wear and tear of the cochlea and auditory nerve

• Wear and tear of the semicircular canals

• Wear and tear of the eardrum

• Wear and tear of the ear canal