Sample Question
Question 1. How many different types of hearing loss have you seen in people?
Answer:
There are three types of hearing loss as
- Conductive hearing loss: Sound cannot be transmitted from the outer to the inner ear with this type of hearing loss. This can be caused by an ear infection, ear trauma, or a buildup of ear wax.
- Sensorineural hearing loss: Either the cochlea or the hearing nerves are affected in this form of hearing loss. This can occur as a result of advanced age, noise exposure, or cancer therapy.
- Mixed hearing loss: The combination of conductive and sensorineural hearing loss causes this form of hearing loss. This can happen for a variety of reasons, including the causes of both hearing loss and hearing loss.
Question 2. Is it possible to hear a cell phone ringing in a vacuum chamber?
Answer:
When a bell vibrates in air, air molecules are pushed out of the way, causing the vibrations to “decay.” If you ring a bell in a vacuum, the loss mechanism isn’t present, hence the bell will “rang” for a longer time (but nobody can hear it). This does not imply that the initial amplitude is considerably higher; it just means that it lasts longer.
Question 3. Write functions of human ear.
Answer:
The human ear’s various structures aid in various purposes.
- The eardrum is protected by the pinna of the outer ear, which transports sound to the eardrum through the auditory canal.
- When the eardrum vibrates, sound is transmitted to the inner ear.
- The middle ear’s ossicles enhance sound and transmit vibrations to the oval window. The membrane that separates the inner and middle ear is known as the oval window.
- The Eustachian tube is a thin tube that links our nose to our ear. This tube aids in the passage of air into the lungs and discharges mucus to the nasopharynx.
- The cochlea is a structure found in the inner ear. It is filled with fluid and houses the Corti organ. Cortis organ has cilia, which are hair-like sensory cells. Waves from the middle of the year generate vibrations in the inner ear fluid, which causes the cilia to vibrate. The cilia vibrates, sending nerve signals to the brain.
- The semicircular canals in the inner ear are vertically aligned with one another. It also has fluid in it, which aids in mobility.
Question 4. What is the range of hearing in humans?
Answer:
The audible range of sound is defined as the range of frequencies that humans can hear between 20 Hz and 2000 Hz. Infrasonic sound is defined as sound with a frequency less than 20 Hz. Ultrasonic sound is defined as sound with a frequency greater than 2000 Hz. But humans cannot hear both infrasonic sound and ultrasonic sound
Question 5. What is the mechanism through which bats use ultrasound to catch their prey?
Answer:
Ultrasounds are sounds with frequencies more than 20000 Hz. Ultrasound is used by bats to navigate (move) and catch prey. Bats make ultrasonic squeaks with a high frequency. These squeaks reverberate off prey and then return to the bat’s ears. This provides bats with a sense of prey location, allowing them to catch the prey.
Human Ear
It has been discovered that sound is a type of energy. Vibrations cause it to happen. Longitudinal waves are sound waves. Because they are elastic waves, they must be transmitted through a material medium. They can move through solids, liquids, and gases. In solids, their velocity is greatest, whereas, in gases, it is lowest.
In our daily lives, we hear a variety of sounds, including pleasant ones known as musical sounds, noise, loud sound, high-pitched sound, and other unpleasant sounds are examples. The majority of mammals on Earth have an external ear. Our auditory system includes the ear. The pinna is the part of the ear that is visible from the outside. Humans, like other mammals, have ears. The temporal bones of the skull house the ears on both sides of the brain. Before discussing the human ear and its range of hearing first we’ll discuss the production of sound and sound waves.