Long-term usage of modern signal processing by listeners with severe or profound hearing loss: a retrospective survey.
OBJECTIVE
To investigate the long-term benefit of multichannel wide dynamic range compression (WDRC) alone and in combination with directional microphones and noise reduction/speech enhancement for listeners with severe or profound hearing loss.


METHODS
At the conclusion of a research project, 39 participants with severe or profound hearing loss were fitted with WDRC in one program and WDRC with directional microphones and speech enhancement enabled in a 2nd program. More than 2 years after the 1st participants exited the project, a retrospective survey was conducted to determine the participants' use of, and satisfaction with, the 2 programs.


RESULTS
From the 30 returned questionnaires, it seems that WDRC is used with a high degree of satisfaction in general everyday listening situations. The reported benefit from the addition of a directional microphone and speech enhancement for listening in noisy environments was lower and varied among the users. This variable was significantly correlated with how much the program was used.


CONCLUSIONS
The less frequent and more varied use of the program with directional microphones and speech enhancement activated in combination suggests that these features may be best offered in a 2nd listening program for listeners with severe or profound hearing loss.
National Acoustic Laboratories, 126 Greville Street, Chatswood, NSW 2067, Australia. E-mail: gitte.keidser@nal.gov.au
Gitte
G
Keidser
David
D
Hartley
Lyndal
L
Carter
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001309:Auditory Threshold; D003638:Deafness / Q000534:rehabilitation*; D004867:Equipment Design; D005260:Female; D006310:Hearing Aids; D006801:Humans; D008297:Male; D008875:Middle Aged; D010342:Patient Acceptance of Health Care; D017060:Patient Satisfaction; D012189:Retrospective Studies; D012815:Signal Processing, Computer-Assisted; D012984:Software; D011795:Surveys and Questionnaires; D055815:Young Adult