From PC World see: www.pcworld.com/article/id,137433-c,iphone/article.html
A group representing people with a hearing loss filed complaints with the U.S. Federal Communications Commission (FCC) last month, accusing Apple Inc. of not making its iPhone compatible with hearing aids.
The Hearing Loss Association of America (HLAA), a Bethesda, Md. advocacy group, filed formal complaints with the FCC in August, Brenda Battat, the HLAA’s associate executive director, said in e-mailed comments about Apple’s iPhone. “The phone [is] not usable with a hearing aid, either on the microphone or telecoil setting,” said Battat. “Clearly it was not designed to be hearing aid compatible. It should have been.”