Subject: Re: cochlear imploants From: Stefan Strahl <stef@xxxxxxxx> Date: Tue, 24 Apr 2012 19:06:59 +0200 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--bcaec5431464639bb104be6fc8be Content-Type: text/plain; charset=ISO-8859-1 Hi Tom :) Who is the manufacturer of your client's CI? Have a look at table 1 of Fan-Gang Zeng's IEEE review paper on CIs ( http://dx.doi.org/10.1109/RBME.2008.2008250). The reported 146.67 mHz would match to the 49 mHz RF carrier of Advanced Bionics. Couldn't your client tune to the 146.67 mHz signal and switch off its implant to test if the signal is coming from her CI's coil or another source? * * :) stefan On Tue, Apr 24, 2012 at 4:22 PM, Tom Brennan <g_brennantg@xxxxxxxx>wrote: > I've a client with an interesting problem. She has recently earned her > technician amateur radio license. She has cochlear implants. She is > having a > problem with signals at 146.67 mHz in the 2 meter band that she believes > are > eminating from her implant. I've seen processing signals in the 70cm band > (around 436 mHz) but never really strong signals. She says that the > signal she > is receiving is being a problem for other radios in the same building that > she's > in. I'm wondering if anyone on the list has seen such extreme rfi > problems from > an implant. I tend to think the signal is probably coming from another > source > but thought I would ask the list. > > Tom > > > Tom Brennan KD5VIJ, CCC-A/SLP > web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html > > --bcaec5431464639bb104be6fc8be Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable <div class=3D"gmail_extra">Hi Tom :)</div><div class=3D"gmail_extra"><br></= div><div class=3D"gmail_extra">Who is the manufacturer of your client's= CI? Have a look at table 1 of=A0Fan-Gang Zeng's IEEE review paper on C= Is (<a href=3D"http://dx.doi.org/10.1109/RBME.2008.2008250">http://dx.doi.o= rg/10.1109/RBME.2008.2008250</a>).=A0The reported 146.67 mHz would match to= the 49 mHz RF carrier of Advanced Bionics. Couldn't your client tune t= o the 146.67 mHz signal and switch off its implant to test if the signal is= coming from her CI's coil or another source?</div> <div class=3D"gmail_extra"><font face=3D"sans-serif"><span style=3D"line-he= ight:19px"><b><br></b></span></font></div><div class=3D"gmail_extra">:)=A0s= tefan</div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">= <div class=3D"gmail_quote"> On Tue, Apr 24, 2012 at 4:22 PM, Tom Brennan <span dir=3D"ltr"><<a href= =3D"mailto:g_brennantg@xxxxxxxx" target=3D"_blank">g_brennantg@xxxxxxxx= .sfasu.edu</a>></span> wrote:<br><blockquote class=3D"gmail_quote" style= =3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> I've a client with an interesting problem. =A0She has recently earned h= er<br> technician amateur radio license. =A0She has cochlear implants. =A0She is h= aving a<br> problem with signals at 146.67 mHz in the 2 meter band that she believes ar= e<br> eminating from her implant. =A0I've seen processing signals in the 70cm= band<br> (around 436 mHz) but never really strong signals. =A0She says that the sign= al she<br> is receiving is being a problem for other radios in the same building that = she's<br> in. =A0I'm wondering if anyone on the list has seen such extreme rfi pr= oblems from<br> an implant. =A0I tend to think the signal is probably coming from another s= ource<br> but thought I would ask the list.<br> <br> Tom<br> <span class=3D"HOEnZb"><font color=3D"#888888"><br> <br> Tom Brennan =A0KD5VIJ, CCC-A/SLP<br> web page <a href=3D"http://titan.sfasu.edu/~g_brennantg/sonicpage.html" tar= get=3D"_blank">http://titan.sfasu.edu/~g_brennantg/sonicpage.html</a><br> <br> </font></span></blockquote></div><br></div> --bcaec5431464639bb104be6fc8be--