From: Jim Meissner (jpmeissner_at_mindspring.com)
Date: 2001-12-02 18:52:04
Dear jbilderback:
It is more like 100 micro volts or more of noise riding on 5 micro volts ofsignal if you have a good strong signal. Look at the "real" data I postedon my website.
Juergen P. (Jim) Meissner
Check out my Website at www.MeissnerResearch.com
Read about the benefits of the Brain State Synchronizer sounds for improving your life and health.
----- Original Message -----
From: JBilderback
To: buildcheapeeg_at_yahoogroups.com
Sent: Sunday, December 02, 2001 1:33 PM
Subject: [buildcheapeeg] A>D sampling rate
>
> Message: 7
> Date: Sat, 1 Dec 2001 13:40:31 -0500
> From: "Jim Meissner" <jpmeissner_at_mindspring.com>
> Subject: Re: Re: I published current design at SourceForge
>
> I got acceptable results using an 8 bit converter. If I had the choicenow I would go for 12 or 16 bits. Any kind of overload clipping such as eye blinks create a large number of frequency artifacts, and if the signal is AC coupled there is a significant overload recovery time. The data is bad enough without introducing errors that you can control with a little moreeffort.
>
> > like 5-10% of the signal is noise.
> I wish that were true. It is more like 95% of the signal is noise.
>
restating the question: if there's say 5uv of high frequency noise
riding on
a 100uv EEG signal then what is gained with 12-16 bit data sampling ??
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This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:32 BST