Wireless: Optimal Frequencies & User Interfaces

Wireless: Optimal Frequencies & User Interfaces

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Description: Choosing the optimal radio frequency using the power advantage of inductive systems, and Company-specific solutions to know How do users handle external devices?.

Author: SÝren Nielsen (Fellow) | Visits: 2838 | Page Views: 2978
Domain:  High Tech Category: Mobile Subcategory: Cellular Data Networks 
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Oticon Wireless overview

S�ren Nielsen President

Oticon Wireless overview

1. 2. 3. 4. 4 5.

Choosing th optimal radio f Ch i the ti l di frequency The power advantage of inductive systems How do users handle external devices? Company specific Company-specific solutions Summary


Oticon Wireless overview

Choosing the optimal radio frequency
Frequency < 15 MHz Features Short-range magnetic Applications � nEARlink � RFID � Telecoil � FM educational systems � Sensors, e.g. temperature t t � Remote controls � � � � � � � � PC gaming devices Intelligent h I t lli t homes GSM900 RFID Bluetooth WLAN DECT WiFi Manufacturer � � � � Oticon Siemens Phonak Widex

200 MHz 433 MHz

Mainly FM systems Control and sensors

� Oticon � Phonak � Interton � (ON S i) Semi) � Starkey � (SDT)

800-900 MHz

Audio streaming and control t l

2.4 GHz

Audio streaming and networks

� GN ReSound


Oticon Wireless overview

Choosing the optimal radio frequency
2.4 GHz
Interference from WLAN, WiFi BT I t f f WLAN WiFi, etc. Interference from microwave ovens High level of body absorption
Probably no binaural Probably no streaming from devices worn in the pocket orn

800-900 MHz
Frequency bands are different, e.g. USA, Europe, Australia, New Zealand Not allowed in Japan Interference from mobile phones etc. when travelling outside home country Probably not allowed on airplanes


Oticon Wireless overview

Body absorption of radio frequencies
10 9 8 7

GN ReSound
Loss dB B/cm 6 5 4 3 2 1 0 1,00E+07







Source: WDH graph based on Compilation of the Dielectric Properties of Body Tissues at RF and Microwave Frequencies, Camelia Gabriel, Brooks Air Force Technical Report AL/OE-TR-1996-0037.

Oticon Wireless overview

High-frequency solutions � pros and cons

Range 2-6 meters g No streamer for TV No neckloops p Direct wireless programming interface

Require extra devices anyway q y y Limited number of applications Current consumption is up to 12 p p times that of nEARlink Regulatory issues Interference from other sources I t f f th Problem with battery and binaural communication Antenna size dictates design


Oticon Wireless overview

How do users handle external devices?
Adjust the volume Pick up the phone

Listen to music

Switch between devices

Hear the TV


Oticon Wireless overview

Inductive systems have big power advantages
Current consumption (uA)
RX 3500

Superior receiving power Difference is technological:
Inductive systems utilise the battery of the streamer device Devices with direct reception put all the load on the hearing aid itself





Physical size is limited by antenna size Potential problems with the battery
Lack of support for small batteries Sound artifacts Lifetime and reliability



0 Oticon Simens Widex nEARlink E2E ver. 2 10.6MHz NHX 2180 (MC) Starkey GN 850MHz 2.4GHz Phonak NXP


Oticon Wireless overview

More user interfaces to all devices
More devices are needed to control both TV and mobile Not available

Custom adapter Connect to TV by using hearing aid buttons

Custom adapter

HIs' buttons

Custom adapter

Phone Clip

Custom adapter


Oticon Wireless overview

One user interface to all devices
Phone adapter d t All controlling is performed using one device


Adapter p

TV box adapter


Oticon Wireless overview

Examples of user control
Change the volume: Use Streamer or Use remote control Pick up cell phone: Use Streamer or Use phone clip and remote control in combination Pick up land-line phone: Use Streamer Not N t available il bl Switch between devices/pairing/channel selection: Use Streamer or Use remote control Turn TV sound on/off: Use Streamer or Use remote control or hearing aid buttons

y y Our wireless system is easy to handle


Oticon Wireless overview

Empowering people with wireless

Unmatched ease of handling using one device g Lowest power consumption and smallest design Highest audiological performance due to ear-to-ear communication Broad application due to standard Bluetooth interface


Oticon Wireless overview