Download Attachment 8 - IISME Community Site

Attachment 8 –
Questions for reading “Noise-Induced Hearing Loss”
Directions: Either write the questions and answer briefly, or answer in complete
sentences. (1.5 pts each)
1.
2.
3.
4.
Damage to what structures lead to noise-induced hearing loss (NIHL)?
T/F – Hair cells can grow back.
What units are used to measure sound?
As presented in the reading, what are the three key points for the “rule of thumb”
regarding noises to avoid?
5. Why is impulse noise potentially dangerous?
6. What is a temporary threshold shift? How long does it typically last?
7. T/F – If you are suffering from NIHL you will immediately recognize the symptoms.
8. Who can develop NIHL?
9. List three activities that can put someone at risk for NIHL.
10. Give two examples of how you can protect your hearing.
11. What is the general name for the destructive molecules that cause hair cell damage?
12. T/F – There is no way to prevent NIHL.
13. Briefly describe two areas of research associated with reversing and/or preventing
NIHL.
14. What are the names of the bones of the middle ear? Briefly describe their function.
15. Where in the ear are the hair cells located?
16. How does information about sound reach our brain?
Attachment 8 – KEY
Answers for questions “Noise-Induced Hearing Loss”
1.
2.
3.
4.
Damage to hair cells lead to noise-induced hearing loss.
FALSE – Once damaged, hair cells cannot grow back.
Sound is measured in units called decibels.
According to the reading, noises should be avoided if they are “too loud” and “too
close” or last “too long.”
5. Exposure to a loud impulse sound can result in immediate hearing loss.
6. A temporary threshold shift is a temporary loss of hearing. Recovery usually
occurs within 16-48 hours.
7. FALSE – In most cases of NIHL, the symptoms occur gradually, and you may not
even be aware of the loss.
8. People of all ages can develop NIHL, including children, teens, young adults, and
older people.
9. Activities that can put someone at risk for NIHL include, target shooting, playing
in a band, and attending concerts.
10. I can protect my hearing by wearing earplugs when involved in loud activities,
and by being aware of noises that can cause damage and applying the “rule of
thumb.”
11. The destructive molecules that cause hair cell damage are called free radicals.
12. FALSE - NIHL is 100% preventable.
13. Gene therapy is being pursued as a means for reversing NIHL, through the regrowth of hair cells. Nutrient supplementation with vitamins and minerals is also
being explored as a means to prevent NIHL.
14. The bones of the middle ear are the incus, malleus, and stapes. These bones serve
to amplify the sound vibrations and send them to the inner ear.
15. Hair cells rest on the basilar membrane of the cochlea.
16. Information about sound reaches the brain via the auditory nerve. (The tilting of
hair cells causes pore-like channels to open allowing certain chemical to rush in,
creating an electrical signal. The auditory nerve carries this electrical signal to the
brain, where is it translated.)