Biosignal Processing: Master the Analysis of Biological Signals

Question 1

What is the approximate frequency range of an ECG signal?

Accepted Answer

1-100 Hz

Answer

100-1000 Hz

Answer

1-1000 Hz

Answer

1000-10000 Hz

Question 2

Which signal processing technique is commonly employed to remove noise from EEG signals?

Accepted Answer

Band-pass filtering

Answer

Thresholding

Answer

Principal component analysis (PCA)

Answer

Discrete Fourier transform (DFT)

Question 3

What is the primary purpose of applying a Fourier transform to a biosignal?

Accepted Answer

To decompose the signal into its constituent frequency components

Answer

To enhance the signal's signal-to-noise ratio

Answer

To filter out unwanted artifacts

Answer

To detect patterns and trends in the signal

Question 4

Which biosignal is primarily used to monitor muscle activity?

Accepted Answer

Electromyography (EMG)

Answer

Electrocardiogram (ECG)

Answer

Electroencephalogram (EEG)

Answer

Electrooculogram (EOG)

Question 5

What is the key distinction between bipolar and monopolar biosignal recording methods?

Accepted Answer

The placement of the electrodes

Answer

The number of electrodes used

Answer

The amplitude of the recorded signal

Answer

The frequency response of the recording system

Question 6

Which of the following is a primary type of biosignal used in biomedical engineering?

Accepted Answer

Electrocardiogram (ECG)

Answer

Magnetic Resonance Imaging (MRI)

Answer

X-ray

Answer

Positron Emission Tomography (PET)

Question 7

Electroencephalography (EEG) measures electrical impulses primarily from which part of the body?

Accepted Answer

Brain

Answer

Heart

Answer

Muscles

Answer

Stomach

Question 8

Which of the following signal processing techniques is frequently employed to eliminate noise from ECG signals?

Accepted Answer

Filtering

Answer

Fourier Transform

Answer

Wavelet Transform

Answer

Principal Component Analysis

Question 9

Within an EEG, what is the typical frequency range (in Hz) of alpha waves?

Accepted Answer

4-8

Answer

0.5-4

Answer

8-13

Answer

13-30

Question 10

In an ECG, the QRS complex corresponds to which cardiac event?

Accepted Answer

Ventricular depolarization

Answer

Atrial depolarization

Answer

Atrial repolarization

Answer

Ventricular repolarization

Question 11

The Fourier Transform is a signal processing technique primarily used for:

Accepted Answer

Frequency analysis

Answer

Time-domain analysis

Answer

Image reconstruction

Answer

Noise suppression

Question 12

Which of the following is not a typical type of biological signal?

Accepted Answer

Magnetic Resonance Imaging (MRI)

Answer

Electrocardiogram (ECG)

Answer

Electroencephalogram (EEG)

Answer

Electromyogram (EMG)

Question 13

What is the main purpose of signal filtering in biosignal processing?

Accepted Answer

Removing unwanted noise

Answer

Extracting specific signal components

Answer

Amplifying the signal

Answer

Converting the signal to digital format

Question 14

Which type of biosignal is measured using an Electroencephalogram (EEG)?

Accepted Answer

Electrical activity in the brain

Answer

Electrical activity in the heart

Answer

Muscle activity

Answer

Eye movements

Question 15

Which of the following frequency bands in EEG is associated with a relaxed and awake state?

Accepted Answer

Alpha (8-12 Hz)

Answer

Delta (0.5-4 Hz)

Answer

Theta (4-8 Hz)

Answer

Beta (12-30 Hz)

Question 16

What is the primary purpose of applying Fourier transform in biosignal processing?

Accepted Answer

To convert the signal from the time domain to the frequency domain

Answer

To remove noise from the signal

Answer

To amplify specific signal features

Answer

To compress the signal for storage

Question 17

Which of the following filtering techniques is best suited for removing high-frequency noise in a biosignal?

Accepted Answer

Low-pass filter

Answer

High-pass filter

Answer

Band-pass filter

Answer

Kalman filter

Question 18

What is the main objective of performing baseline correction in biosignal processing?

Accepted Answer

To shift the signal to have a zero mean

Answer

To remove high-frequency noise from the signal

Answer

To amplify specific signal features

Answer

To reduce signal distortion

Question 19

What is the primary purpose of signal normalization in biosignal processing?

Accepted Answer

To remove baseline drift and scale data to enhance comparability

Answer

To solely remove artifacts

Answer

To exclusively enhance signal-to-noise ratio

Question 20

Which filter type is primarily used to eliminate high-frequency noise from biosignals?

Accepted Answer

Low-pass filter

Answer

Band-stop filter

Answer

Band-pass filter

Answer

High-pass filter

Question 21

What is the fundamental concept underpinning the Fourier transform in biosignal processing?

Accepted Answer

Decomposing a signal into its constituent frequency components

Answer

Smoothing a signal

Answer

Eliminating noise from a signal

Question 22

Which limitation is inherent to ECG in the context of diagnosing cardiac arrhythmias?

Accepted Answer

It provides information solely about electrical activity, not mechanical function

Answer

It requires access to highly specialized equipment

Answer

It is highly susceptible to artifacts

Question 23

Which characteristic is NOT typically associated with EMG signals?

Accepted Answer

High amplitude and low frequency

Answer

Diagnostic utility in neuromuscular disorders

Answer

Reflection of muscle activity

Answer

Voluntary control

Question 24

What is the primary role of wavelet analysis in biosignal processing?

Accepted Answer

Multi-resolution examination for feature extraction at varying time scales

Answer

Denoising of signals

Answer

Compression of signals