Lesson 7 - Introduction to Audiometry

Question 1

A dial on the audiometer to control the decibels of output is called:

a. a frequency dial
b. a hearing level dial
c. a attenuator dial
d. b & c above

Answer 1

d. b & c above

Question 2

Audiometric zero for pure tones is higher than the standard reference level by about:

a. 35 dB
b. 20 dB
c. 10 dB
d. differs at each frequency

Answer 2

d. differs at each frequency

Question 3

ANSI letters stand for:

a. Amplitude Narrowing in Short Increments
b. Alternate Non Sensitive Intensities
c. American National Safety Institute
d. American National Standards Institute

Answer 3

d. American National Standards Institute

Question 4

The audiometer is designed so that zero on the attenuator dial:

a. corresponds to the same sound pressure level at each audiometer frequency
b. represent the level of normal hearing for that frequency
c. represents where the best ear can hear
d. you hear no sound when the dial is at 0

Answer 4

b. represent the level of normal hearing for that frequency

Question 5

by air conduction, sound energy changes forms in which of the following matters:

a. Acoustic energy, mechanical energy, chemical energy, electrical energy to hydraulic energy
b. mechanical energy, acoustic energy, chemical energy, hydraulic energy to electrical energy
c. acoustic energy, mechanical energy, hydraulic energy, electrical energy to chemical energy
d. electrical energy, mechanical energy, acoustic energy, hydraulic energy to chemical energy

Answer 5

c. acoustic energy, mechanical energy, hydraulic energy, electrical energy to chemical energy

Question 6

The normal ear response to a range of frequencies from:

a. 15–50,000 Hz
b. 20–20,000 Hz
c. 20–30,000 Hz
d. 30–30,000 Hz

Answer 6

b. 20–20,000 Hz

Question 7

Sound waves, during bone conduction, transmit from the:

a. skull to the cochlea
b. ossicles to the cochlea
c. pinna to the ossicles
d. Skull to the eighth nerve

Answer 7

a. skull to the cochlea

Question 8

Which of the following describes a Phon?

a. A unit of measurement when comparing the loudness of one frequency to another frequency
b. A unit of measurement to determine that just noticeable difference (JND)
c. A unit to measure loudness
d. A unit of measurement for comparing the threshold of audibility with the threshold of comfort

Answer 8

a. A unit of measurement when comparing the loudness of one frequency to another frequency

Question 9

Routine hearing testing should be performed:

a. in an anechoic chamber
b. in the home environment
c. in sound controlled environment
d. in a room with a sound meter

Answer 9

c. in sound controlled environment

Question 10

Audiometric zero is:

a. 0 dB Hearing Level
b. 0 dB HL
c. the level where normal ears can hear at every frequency
d. all of the above

Answer 10

d. all of the above