Hearing aid electromagnetic interference from digital cellular telephones

被引：0

作者：

Skopec, M ^{[1
]}

机构：

[1] US FDA, Ctr Devices & Radiol Hlth, Rockville, MD 20852 USA

来源：

PROCEEDINGS OF THE 18TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOL 18, PTS 1-5 | 1997年 / 18卷

关键词：

hearing aid; electromagnetic interference; cellular telephones;

D O I：

暂无

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Several in-the-ear (ITE) and behind-the-car (BTE) hearing aids were tested for audible interference at various distances from five types of digital cellular telephones. The interference, which takes the form of a buzzing and a static sound, was quantified using a calibrated system including a frequency analyzer and a pressure field microphone. The output of the each hearing aid was coupled to the microphone via Tygon tubing and a standard 2 cc coupler. The highest interference induced sound pressure level (SPL), 122.5 dB, was measured from a BTE hearing aid placed within 2 cm of a transmitting GSM phone. In this case, interference was detected up to a separation distance of almost 3 meters. While all phones tested produced a similar interference level within 2 cm of this hearing aid, interference SPL from the CDMA based system decreased more rapidly with distance than the TDMA based phones tested. Subjective testing was also conducted using a listening stethoscope in order to further characterize the interference.

引用

页码：409 / 410

页数：2