Lec 11. Soundfield calibration

Question 1

A room that is said to be a ‘free sound field’ is generally only found where

a. a sound proof room
b. sound treated room
c. vacuum chamber
d. an anechoic room

Answer 1

d. an anechoic room

Question 2

Calibration standards for a sound field have been done with bilateral hearing subjects. What are the implications of this?

a. For a unilateral listener their thresholds will be 2-3dB worse
b. Unilateral listeners levels will be better by about 4dB
c. There will be no measurable difference between unilateral and bilateral so there are no implications
d. The results will always need to be adjusted by a factor of threshold x1.13 for unilateral listeners

Answer 2

a. For a unilateral listener their thresholds will be 2-3dB worse

Question 3

For a young baby at 8 weeks old on BOA testing, they will respond more readily to what?

a. warbled pure tones
b. complex tonal sounds
c. speech sounds
d. sounds that are repeated constantly

Answer 3

c. speech sounds

Question 4

The largest correction factor for dB(A) to dBHL conversion is at what frequency? 
a. 2k
b. 4k
c 500 
d 250

Answer 4

b. 4k

Question 5

At what average age does ‘objective permenance’ become a factor in distraction testing?

a. 18mths
b. 6mths
c. 10mths
d. 3 mths

Answer 5

c. 10mths