Title :
Evaluation of electromagnetic interference from a cellular telephone with a hearing aid
Author :
Caputa, K. ; Stuchly, M.A. ; Skopec, M. ; Bassen, H.I. ; Ruggera, P. ; Kanda, M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
fDate :
11/1/2000 12:00:00 AM
Abstract :
In a collaborative effort, electromagnetic interference (EMI) is evaluated from a global system for mobile communication telephone with one model of a hearing aid used in the ear canal. Since the electromagnetic fields cannot be measured in the ear canal, a reliable method of their modeling with the finite-difference time-domain method is established. Very good agreement has been achieved between the measured and computed electric and magnetic fields in free space in very close proximity to the telephone. Subsequently, electric and magnetic fields in the ear canal are computed for two models of the ear, and three positions of the telephone. The computed fields are compared with the acoustic measurements for a small number of humans subjected to the EMI test.
Keywords :
cellular radio; finite difference time-domain analysis; hearing aids; telephone interference; EMI test; cellular telephone; computed fields; ear canal; ear models; electromagnetic interference evaluation; finite-difference time-domain method modeling; humans; Acoustic measurements; Auditory system; Ear; Electromagnetic interference; Electromagnetic measurements; Electromagnetic modeling; International collaboration; Irrigation; Magnetic field measurement; Telephony;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on