The advantages and disadvantages of ITC, ITE and BTE hearing aids: diary and interview reports from elderly users.
The advantages and disadvantages of in-the-canal (ITC), in-the-ear (ITE) and behind-the-ear (BTE) hearing aids for elderly aid users were examined. Two hundred and forty four clients were randomly assigned to one of the three aid types from seven hearing aid manufacturers. The clients' perceived help from their fitting, and the degree of difficulty they encountered over a range of listening situations and environments were rated using a daily diary and a structured interview. Findings indicated that for elderly clients there were no large practical advantages for one aid type over another. While ITC and ITE aids were rated more highly than BTE's in background noise, all three aid types were rated as relatively poor in background noise as well as in groups, in the wind, when using the telephone and in the localisation of sound. All three aid types were rated equally and well for performance in one-to-one conversation in quiet, and for listening to television and radio. Hours of use and reasons for non-use are presented, as are clients' reports on cosmetic issues, manipulative ease and overall satisfaction level with their aids.