Audiometry multiple choice questions

 Audiometry

Mechanism of Hearing

1. What is the unit of dB?
a) watts per sq cm
b) dyne per sq cm
c) unit less
d) watts per cm
Answer: unit less
2. Name the bone that rests upon the lower end of the cochlea and passes the vibrations directly into the fluid within.
a) malleus
b) stapes
c) incus
d) hammer
Answer: stapes
3. Decibel expresses the logarithm of the ratio between two sound _________
a) intensities
b) powers
c) pressures
d) intensities, powers and pressures
Answer: intensities, powers and pressures
4. The major function of the middle ear is ____________
a) to transfer movements of the air in the outer ear to the cochlea
b) to transfer movements of the air in the outer ear to the auditory nerves
c) to transfer movements of the air in the outer ear to the tympanic membrane
d) to transfer movements of the air in the outer ear to the fluid-filled chambers of the inner ear
Answer: to transfer movements of the air in the outer ear to the fluid-filled chambers of the inner ear
5. Speech audiometers are normally used to determine ______________
a) speech reception thresholds for diagnostic purposes
b) air-conduction and bone-conduction thresholds of hearing
c) bone-conduction thresholds of hearing
d) air-conduction thresholds of hearing
Answer: speech reception thresholds for diagnostic purposes
6. The human ear responses to vibrations ranging from ___________
a) 20KHz – 20MHz
b) 2KHz – 20MHz
c) 20Hz – 20KHz
d) 2Hz – 2KHz
Answer: 20Hz – 20KHz
7. Which threshold of hearing is measured by a pure-tone audiometer?
a) air-conduction thresholds of hearing
b) bone-conduction thresholds of hearing
c) speech reception thresholds for diagnostic purposes
d) air-conduction and bone-conduction thresholds of hearing
Answer: air-conduction and bone-conduction thresholds of hearing
8. The tympanic membrane separates the ear canal from the _____________
a) upper ear cavity
b) lower ear cavity
c) middle ear cavity
d) inner ear cavity
Answer: middle ear cavity
9. The middle ear is exposed to atmospheric pressure only through the _______
a) eustachian tube
b) tympanic membrane
c) pinna
d) auditory nerve
Answer: eustachian tube
10. Sound intensity is proportional to the _________ of sound pressure.
a) cube
b) square
c) inverse square
d) inverse square root
Answer: square
11. If I1 and I2 are two intensities in watts per square centimetre, then the number of decibels with which they are related can be expressed as _________
a) N = 10 log I1/I2
b) N = 10 log I2/I1
c) N = -10 log I1/I2
d) N = log I1/I2
Answer: N = 10 log I1/I2
12. __________ is specialized equipment, which is used for the identification of hearing the loss in individuals.
a) gaugemeter
b) tachometer
c) manometer
d) audiometer
Answer: audiometer
13. Unit of sound intensity ________
a) joules per sq. cm
b) watt per sq. cm
c) joules per cm
d) watt per cm
Answer: watt per sq. cm
14. The hearing threshold is an invariable fixed intensity above which sound is always heard and below which sound is never heard.
a) True
b) False
Answer: True
15. Air conduction, by definition, is the transmission of sound through the external and middle ear to the internal ear.
a) True
b) False
Answer: True

Measurement of Hearing

1. ___________ amplifier circulatory is employed to reduce the hum noise generated by the power supply in the ECG circuit.
a) low pass filters
b) high pass filters
c) band pass filters
d) notch filters
Answer: notch filters
2. The range of FHR measurement due to substitution logic is between __________ bpm.
a) 20-220
b) 60-260
c) 40-240
d) 0-200
Answer: 40-240
3. The range of CMRR of Foetal electrocardiogram is ______________
a) 0-120 dB
b) 0-200 dB
c) 0-150 dB
d) 0- 130 dB
Answer: 0-120 dB
4. Speech audiometry normally allows measurements to be made within the frequency range of _____
a) 300–3000 Hz
b) 30–300 Hz
c) 300–3000 KHz
d) 3–30K Hz
Answer: 300–3000 Hz
5. What is the role of Cupraphan in haemodialysis?
a) used to check conductivity of dialyzer
b) used as membrane
c) used to check blood leakage
d) not at all used
Answer: used as membrane
6. The unit of sensitivity of an electrocardiograph is ________
a) m/mV
b) mm/V
c) mm/mV
d) m/V
Answer: mm/mV
7. Pure-tone audiometers usually generate test tones in octave steps from ___________
a) 125 to 800 Hz
b) 125 to 8000 Hz
c) 25 to 8000 Hz
d) 15 to 800 Hz
Answer: 125 to 8000 Hz
8. The signal intensity of Pure-tone audiometers ranging from ______
a) 10 dB to +100 dB
b) –10 dB to -100 dB
c) –10 dB to +100 dB
d) –10 dB to +10 dB
Answer: –10 dB to +100 dB
9. Which of the following is the property of instrumentational amplifier?
a) Extremely low input impedance
b) High bias and offset currents
c) Low slew rate
d) Very high CMRR
Answer: Very high CMRR
10. Foetal ECG signal detected via electrodes placed on mother’s abdomen is complex and requires attenuation of maternal signals for obtaining FHR.
a) True
b) False
Answer: True
11. The frequency range of pure-tone audiometer is more than that of speech audiometer.
a) True
b) False
Answer: True
12. The blood is a good conductor of electricity.
a) True
b) False
Answer: False
13. Power Line Hum is responsible for most of common-mode interfering signal.
a) True
b) False
Answer: True
14. The volume of blood outside the dialyzer is known as priming volume.
a) True
b) False
Answer: False
15. notch filters amplifier circulatory is employed to reduce the hum noise generated by the power supply in the ECG circuit.
a) True
b) False
Answer: True