Author Question: Hearing is expressed in decibels (dB), or units of loudness. Which is the softest sound a normal ear ... (Read 58 times)

ap345

  • Hero Member
  • *****
  • Posts: 537
Hearing is expressed in decibels (dB), or units of loudness. Which is the softest sound a normal ear can hear?
 
  a. 0 dB
  b. 10 dB
  c. 40 to 50 dB
  d. 100 dB

Question 2

The nurse should suspect a hearing impairment in an infant who demonstrates which behavior?
 
  a. Absence of the Moro reflex
  b. Absence of babbling by age 7 months
  c. Lack of eye contact when being spoken to
  d. Lack of gesturing to indicate wants after age 15 months



mfedorka

  • Sr. Member
  • ****
  • Posts: 324
Answer to Question 1

ANS: A
By definition, 0 dB is the softest sound the normal ear can hear. Ten dB is the sound of the heartbeat or the rustling of leaves. 40 to 50 dB is in the range of normal conversation. The noise of a train is approximately 100 dB.

Answer to Question 2

ANS: B
The absence of babbling or inflections in voice by age 7 months is an indication of hearing difficulties. The absence of the Moro reflex and eye contact when being spoken to does not indicate a hearing impairment. The child with hearing impairment uses gestures rather than vocalizations to express desires at this age.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

There are 60,000 miles of blood vessels in every adult human.

For a complete list of videos, visit our video library