Without

With

p

Sound-field pure tone audiometry

Air-conduction threshold at 250 Hz

60 (55 - 65)

25 (15 - 30)

<0.001

Air-conduction threshold at 500 Hz

65 (60 - 70)

25 (15 - 30)

<0.001

Air-conduction threshold at 1000 Hz

60 (55 - 70)

20 (15 - 30)

<0.001

Air-conduction threshold at 2000 Hz

55 (50 - 65)

20 (15 - 30)

<0.001

Air-conduction threshold at 3000 Hz

60 (55 - 65)

25 (15 - 35)

<0.001

Air-conduction threshold at 4000 Hz

60 (55 - 75)

25 (20 - 35)

<0.001

Air-conductionthreshold PTA

62 (55 - 67)

25 (17 - 32)

<0.001

Sound-fieldspeechaudiometry

Percent of maximum speech discrimination at 60 dB

0 (0 - 15)

100 (90 - 100)

<0.001

APHAB scales

Ease of communication

57 (39 - 83)

7 (2 - 17)

<0.001

Backgroundnoise

71 (50 - 89)

19 (10 - 33)

<0.001

Reverberation

5 (42 - 83)

19 (12 - 26)

<0.001

Aversiveness

7 (1 - 22)

56 (37 - 79)

<0.001

APHAB global score

55 (36 - 63)

28 (19 - 34)

<0.001