White noise vs Black body radiation

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SUMMARY

The discussion centers on the comparison between noise generated by the human brain and black body radiation in the context of Nuclear Magnetic Resonance (NMR). Participants clarify that the noise from the human brain is considered white noise due to its random and uniform frequency distribution. Additionally, the thermal noise across a resistor, known as Johnson or Nyquist noise, is referenced as an approximation of black body radiation, described by the formula v = sqrt(4kTBR), where k is the Boltzmann constant, T is temperature in Kelvin, B is bandwidth in Hz, and R is resistance in ohms.

PREREQUISITES
  • Nuclear Magnetic Resonance (NMR) principles
  • Understanding of white noise characteristics
  • Knowledge of black body radiation concepts
  • Familiarity with Johnson or Nyquist noise and its formula
NEXT STEPS
  • Research the characteristics of white noise in neurophysiology
  • Study the principles of black body radiation and its applications
  • Explore the Johnson-Nyquist noise formula in detail
  • Investigate the implications of thermal noise in NMR technology
USEFUL FOR

Researchers in neurophysiology, physicists studying thermal noise, and engineers working with Nuclear Magnetic Resonance technology will benefit from this discussion.

xfshi2000
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Hi all:
I am confused about one question. When we detect signal from human brain using coil in Nuclear Magnetic Resonance, two source contribute noise to our signal. One is coil itself. The other is human brain. Why can we think the noise from human brain is white noise? Can we compare the noise generated by human brain with that emitted from black body radiation? I know for a resistor, we consider it as approximation black body for current. I hope to know what cause white noise of human brain? thanks for your help.

xf
 
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