Podcast
Questions and Answers
What is the function of the 'pinna' in the human ear?
What is the function of the 'pinna' in the human ear?
- Amplify sound vibrations
- Convert sound waves into electrical signals
- Protect the eardrum
- Collect sound from the surroundings (correct)
Which part of the ear is responsible for amplifying vibrations?
Which part of the ear is responsible for amplifying vibrations?
- Hammer, anvil, and stirrup (correct)
- Eustachian tube
- Auditory nerve
- Cochlea
What happens when a compression of the medium reaches the eardrum?
What happens when a compression of the medium reaches the eardrum?
- The eardrum protects the inner ear
- The eardrum converts sound waves into electrical signals
- The eardrum vibrates (correct)
- The eardrum moves outward
Which part of the ear turns pressure variations into electrical signals?
Which part of the ear turns pressure variations into electrical signals?
What transmits the amplified pressure variations from the middle ear to the inner ear?
What transmits the amplified pressure variations from the middle ear to the inner ear?
What is the function of the three bones (hammer, anvil, stirrup) in the middle ear?
What is the function of the three bones (hammer, anvil, stirrup) in the middle ear?
What is the speed of sound in sea water as mentioned in the text?
What is the speed of sound in sea water as mentioned in the text?
How deep is the sea if the distance of the seabed from the ship is 2.62 km?
How deep is the sea if the distance of the seabed from the ship is 2.62 km?
What is the time taken for the sonar pulse to return from the underwater cliff?
What is the time taken for the sonar pulse to return from the underwater cliff?
How do bats search out prey and fly in dark night?
How do bats search out prey and fly in dark night?
What allows us to convert pressure variations in air with audible frequencies into electric signals for hearing?
What allows us to convert pressure variations in air with audible frequencies into electric signals for hearing?
Besides bats, what other marine animals use ultrasound for navigation and food location?
Besides bats, what other marine animals use ultrasound for navigation and food location?
