2010 ADA Standards for Accessible Design Pocket Guide
706.3 Receiver Hearing-Aid Compatibility.
Receivers required to be hearing-aid compatible shall interface with telecoils in hearing aids through the provision of neckloops. [S.H. 4.33.7]
Advisory 706.3 Receiver Hearing-Aid Compatibility. Neckloops and headsets that can be worn as neckloops are compatible with hearing aids. Receivers that are not compatible include earbuds, which may require removal of hearing aids, earphones, and headsets that must be worn over the ear, which can create disruptive interference in the transmission and can be uncomfortable for people wearing hearing aids.