Neil
I asked a contact who is using Cyberlink, whether the mobile phone
interfered.
He says that with the phone on his wheelchair tray, there was no
interference. The phone had to be held close to the cyberlink headband to
see any interference.
Barry Taylor, Clinical Scientist
Bioengineering Department
Tulley Medical Physics Building, Hull Royal Infirmary
Anlaby Road, Hull HU3 2JZ
Tel 01482 675928, fax 01482 675750
> ----------
> From: Neil Gregory[SMTP:[log in to unmask]]
> Reply To: A discussion list for Assistive Technology professionals.
> Sent: 09 April 2002 16:18
> To: [log in to unmask]
> Subject: EMG and mobile phones
>
> Dear All,
>
> I was using a surface EMG system that showed the EMG trace on the screen.
> The system I use has a peak detection of 400uV and the signals I was
> getting were about 5-10uV. The client's relative received a call on their
> mobile phone during the assessment and this severely interfered with the
> EMG signal. I had used skin preparation, good electrodes, good signal to
> noise ratio reduction in the pre-amplifier, fibre optic link to the PC and
> the phone was about 2 meters away. This would render the system useless
> during a mobile phone call.
>
> I have tested this again at work and get interference during a call at
> about 1 metre (presumably different signal strengths). Has anybody else
> observed this phenomenon or does anybody have advise about this. Obviously
> I will ask people not to have mobile phones on when within the same room
> as the EMG equipment.
>
> Thanks,
>
> Neil Gregory
> Clinical Engineer
> Access to Communication and Technology
> West Midlands Rehabilitation Centre, England
> [log in to unmask]
> Tel. UK +44 (0)121-627 8235
> Fax. UK +44 (0)121-627 8892
>
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