| 21. | Heat causes electrons to move around and distort the current in the fMRI detector, producing thermal noise.
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| 22. | For example, at 1 MHz the man-made noise might be 55 dB above the thermal noise floor.
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| 23. | Many researchers are presently engaged in understanding how molecular-scale motors operate in environments with non-negligible thermal noise.
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| 24. | Theoretical analysis indicates that even this impressive feat is far from pushing the limits set by thermal noise.
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| 25. | This TES array is cooled to a temperature of 0.3 Kelvin to reduce thermal noise in the detectors.
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| 26. | Some devices are only practical to operate cryogenically as otherwise the thermal noise would swamp the detected signal.
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| 27. | Thermal noise rises with the temperature.
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| 28. | Thermal noise is a different physical effect that superimposes on the shot noise, contributing to the experimentally-measured value.
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| 29. | Thermal noise is approximately white, meaning that its power spectral density is nearly equal throughout the frequency spectrum.
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| 30. | Thermal noise can be made lower by cooling the circuits, but this is only usually worthwhile on radio telescopes.
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