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Who has poorer signal-to-noise ratio?

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in Biomedical Instrumentation by (76.6k points)
Who has poorer signal-to-noise ratio?

(a) Transmission Pulse Oximeter

(b) Reflection Pulse Oximeter

(c) Ear Oximeter

(d) Pulse Oximeter

The question was asked in an interview.

Origin of the question is Electromyograph (EMG) topic in chapter Biomedical Recorders of Biomedical Instrumentation

1 Answer

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Best answer
The correct option is (b) Reflection Pulse Oximeter

The explanation: However, in comparison to transmission, the reflection pulse oximeter has poorer signal-to noiseratio. Mendelson et al (1988) utilized multiple photodiodes around the light source to enhance signal level.

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