A Link Loss Model for the On-body Propagation Channel for Binaural Hearing Aids
Författare
Summary, in English
Binaural hearing aids communicate with each other through a wireless link for synchronization. A propagation model is needed to estimate the ear-to-ear link loss for such binaural hearing aids. The link loss is a critical parameter in a link budget to decide the sensitivity of the transceiver. In this paper, we have presented a model for the deterministic component of the ear-to-ear link loss. The model takes into account the dominant paths having most of the power of the creeping wave from the transceiver in one ear to the transceiver in other ear and the effect of the protruding part of the outer ear called pinna. Simulations are done to validate the model using in-the-ear (ITE) placement of antennas at 2.45 GHz on two heterogeneous phantoms of different age-group and body size. The model agrees with the simulations. The ear-to-ear link loss between the antennas for the binaural hearing aids in the homogeneous SAM phantom is compared with a heterogeneous phantom. It is found that the absence of the pinna and the lossless shell in the SAM phantom underestimate the link loss. This is verified by the measurements on a phantom where we have included the pinnas fabricated by 3D-printing.
Publiceringsår
2013
Språk
Engelska
Sidor
6180-6190
Publikation/Tidskrift/Serie
IEEE Transactions on Antennas and Propagation
Volym
61
Issue
12
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Status
Published
Projekt
- EIT_UPD Wireless Communication for Ultra Portable Devices
Forskningsgrupp
- Radio Systems
ISBN/ISSN/Övrigt
- ISSN: 0018-926X