@ner, if a hearing aid does not have a telecoil, a neckloop is useless. The telecoil is just another input to the hearing aid that can be used in conjunction with the microphone. A neckloop gets the sound source into a hearing aid via the telecoil. It's sometimes difficult to use a headset when you wear hearing aids due to the increased chances of hearing aid feedback. Plus, it may be painful to wear a headset because of the pressure put on the hearing aid. We may have to remove the hearing aid if we want to use other technology that requires the use of a headset.
Tony in Michigan