Deaf or Hard of Hearing

Question 1

Deaf (Physiological)

Answer 1

Inability to hear sounds 90dB or greater.

Question 2

Hard of Hearing (Physiological)

Answer 2

Inability to hear below 90dB.

Question 3

Deaf (Educational)

Answer 3

Cannot process linguistic information with OR without a hearing aid.

Question 4

Hard of Hearing (Educational)

Answer 4

Can process linguistic information WITH a hearing aid.

Question 5

Congenital Deafness

Answer 5

Born deaf.

Question 6

Adventitiously Deaf

Answer 6

Deafness is acquired later in life.

Question 7

Prelingual Deafness

Answer 7

Occurs before speech and linguistic development.

Question 8

Postlingual Deafness

Answer 8

Occurs after speech and linguistic development.

Question 9

What are the hearing threshold levels?

Answer 9

Mild: 26-40 dB 
Moderate: 41-55 dB 
Moderate-Severe: 56-70 dB 
Severe: 71-90 dB 
Profound: 91 dB +

Question 10

Prevalence

Answer 10

0.10% of the population aged 6-21 years have a hearing impairment.

Question 11

Outer Ear

Answer 11

Tympanic membrane - Eardrum

Auricle - Protrudes from side of the head.

Question 12

Middle Ear

Answer 12

Ossicles - Hammer
Incus - Anvil
Stapes - Stirrup
Oval Widow

Question 13

Inner Ear

Answer 13

Vestibular Mechanism - Cochlea

Question 14

Hearing Process

Answer 14

The transformation of acoustic energy -> mechanical energy -> neural energy.

Question 15

When is sound painful?

Answer 15

125 dB +

Question 16

Audiometric Zero

Answer 16

Lowest level at which a person with normal hearing can perceive sound.

Question 17

Frequency or Pitch

Answer 17

of vibrations per unit of time of a sound wave.

Measured in cycles/seconds or Hertz. 1 Hz = 1 cycle

Question 18

Screening Tests

Answer 18

Measure otoacoustic emissions to determine how well the cochlea is functioning.

Question 19

Pure-Tone Audiometry

Answer 19

Establishes a person’s threshold for hearing various frequencies.

Question 20

Pure-Tone Threshold

Answer 20

Softest sound audible at least 50% of the time.

Question 21

Speech Reception Threshold

Answer 21

Decibel level at which one can understand speech.

Question 22

Conductive Hearing Impairment

Answer 22

Loss that interferes with the transfer of sound along the conductive pathway of the middle or outer ear.

Question 23

Sensorineural Hearing Impairment

Answer 23

Loss involving the inner ear.

Question 24

Mixed Hearing Impairment

Answer 24

Combination of two types of loss.

Question 25

What are the six features of Deaf culture?

Answer 25

1) Linguistic differentiation
2) Attitudinal deafness
3) Behavioural norms
4) Endogamous marriage patterns
5) Historical awareness
6) Voluntary organizational networks

Question 26

Auditory-Verbal Approach

Answer 26

Uses audition to improve speech.

Question 27

Auditory-Oral Approach

Answer 27

Uses audition, as well visual cues, to improve speech.

Visual cues include: Speechreading (AKA ‘Lipreading’) and Cued Speech.