Preferred overall loudness. II: Listening through hearing aids in field and laboratory tests.
In a laboratory study, we found that normal-hearing and hearing-impaired listeners preferred less than normal overall calculated loudness (according to a loudness model of Moore & Glasberg, 1997). The current study verified those results using a research hearing aid. Fifteen hearing-impaired and eight normal-hearing participants used the hearing aid in the field and adjusted a volume control to give preferred loudness. The hearing aid logged the preferred volume control setting and the calculated loudness at that setting. The hearing-impaired participants preferred, in median, loudness levels of -14 phon re normal for input levels from 50 to 89 dB SPL. The normal-hearing participants preferred close to normal overall loudness. In subsequent laboratory tests, using the same hearing aid, both hearing-impaired and normal-hearing listeners preferred less than normal overall calculated loudness, and larger reductions for higher input levels In summary, the hearing-impaired listeners preferred less than normal overall calculated loudness, whereas the results for the normal-hearing listeners were inconclusive.
Royal Institute of Technology, Stockholm, Sweden. Karolina.Smeds@klinvet.ki.se
Karolina
K
Smeds
Gitte
G
Keidser
Justin
J
Zakis
Harvey
H
Dillon
Arne
A
Leijon
Frances
F
Grant
Elizabeth
E
Convery
Christopher
C
Brew
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D004777:Environment; D005260:Female; D006310:Hearing Aids; D034381:Hearing Loss / Q000503:physiopathology* / Q000534:rehabilitation*; D006801:Humans; D007407:Interviews as Topic; D008144:Loudness Perception / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design