BI2010 - M1 - Signals and systems in Biomedical Engineering

What is the primary difference between signals in the continuous domain and signals in the discrete domain?

• Signals in the continuous domain are continuous in time and amplitude, while signals in the discrete domain are defined at discrete time instances.

• Signals in the continuous domain have infinite resolution, while signals in the discrete domain have finite resolution.

• Signals in the continuous domain cannot be processed by digital systems, while signals in the discrete domain can.

• There is no difference between signals in the continuous and discrete domains.

What does the standard deviation of a signal measure?

• The average value of the signal over time

• The spread or dispersion of the signal values from the mean

• The highest value attained by the signal

• 1. The rate of change of the signal with respect to time

How does electronic noise affect the quality of signals in biomedical engineering applications?

• It increases the amplitude of the signal.

• It decreases the frequency of the signal.

• It distorts the original signal, making it difficult to extract meaningful information.

• 1. It has no impact on the signal.

What does the signal-to-noise ratio (SNR) represent?

• The ratio of signal power to noise power in a signal

• The frequency content of the signal

• The phase difference between the signal and noise

• The average amplitude of the signal

What is the primary purpose of HRV analysis in biomedical applications?

• To measure the heart rate at a specific moment in time.

• To assess the structural abnormalities of the heart.

• To evaluate the variation in time intervals between consecutive heartbeats.

• To monitor blood pressure fluctuations.

Which of the following is a commonly used time-domain HRV index that reflects the overall variability between successive RR intervals?

• Spectral entropy

• Root mean square of successive differences (RMSSD)

• Low frequency (LF) power

• High frequency (HF) power