assuming a fixed frequency what happens if the diameter of an unfocused circular transducer is increased?
Homework Answers
Answer: Since transition distance is proportional to the square of the diameter of circular transducer so if diameter is increased, a much deeper focus will be created and therefore a narrow beamwidth in the relative far field will be obtained.
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assuming a fixed frequency what happens if the diameter of an
unfocused circular transducer is increased?
5.17. An unfocused circular transducer is used in the following configuration at a frequency of 3...
5.17. An unfocused circular transducer is used in the following configuration at a frequency of 3 MHz Transducer Fat Muscle cm 11 cm PROBLEMS 121 Estimate the power which the transducer must radiate into the tissue in order to receive 2 × 10 s w back at its face from the echo due to the fat/muscle interface. Include the effects of beam spreading and list any simplifying as- sumptions you make.
Consider a focused transducer with a radius of curvature of 10 cm and a diameter of...
Consider a focused transducer with a radius of curvature of 10 cm and a diameter of 4 cm. This transducer operates at a frequency of 3.5 MHz, and transmits a pulse of duration 0.857 μs. What is the axial resolution, in mm, at the focal point of the transducer? If the axial resolution was to be improved by a factor-of-two for example, what physical or operating parameters could be changed? Explain.
Consider a focused 1-cm-diameter transducer with 50% bandwidth in water. Its focal length is 2 cm....
Consider a focused 1-cm-diameter transducer with 50% bandwidth in water. Its focal length is 2 cm. Along the transducer axis, there are two point scatters separated by 0.25 mm axially. Find the minimal central frequency of the transducer so that two scatters will appear in the ultrasound image?
5.4 Explain why an antenna can be thought of as a transducer. 5.2 Describe what happens if a transmission line is not t...
5.4 Explain why an antenna can be thought of as a transducer. 5.2 Describe what happens if a transmission line is not terminated in its characteristic impedance. 5.5 In a certain application, a Yagi-Uda antenna is used to receive a horizontally polarised signal. Sketch a four-element Yagi-Uda configuration to receive the signal
5.4 Explain why an antenna can be thought of as a transducer. 5.2 Describe what happens if a transmission line is not terminated in its characteristic impedance. 5.5...
What happens to linear velocity as the radius of an angular movement is increased?
What happens to linear velocity as the radius of an angular movement is increased?
If the period of a waveform is doubled, what happens to the frequency of that waveform?...
If the period of a waveform is doubled, what happens to the frequency of that waveform? The frequency remains the same. The frequency doubles. The frequency becomes one-fourth as large. The frequency becomes four times as large. The frequency becomes half as large.
If the price elasticity for demand is 1.75. What happens if that price is increased by...
If the price elasticity for demand is 1.75. What happens if that price is increased by 20 percent. Will that cause a qty demanded to increase?
What happens to the time to complete a movement if angular velocity is increased? A.) It...
What happens to the time to complete a movement if angular velocity is increased? A.) It decreases B.) It increases C.) It stays the same
TA What happens to the On of a solution when the H3O+ is increased? Decreased? ANSWER:
TA What happens to the On of a solution when the H3O+ is increased? Decreased? ANSWER:
TA What happens to the On of a solution when the H3O+ is increased? Decreased? ANSWER:
TA What happens to the On of a solution when the H3O+ is increased? Decreased? ANSWER:
5.17. An unfocused circular transducer is used in the following configuration at a frequency of 3 MHz Transducer Fat Muscle cm 11 cm PROBLEMS 121 Estimate the power which the transducer must radiate into the tissue in order to receive 2 × 10 s w back at its face from the echo due to the fat/muscle interface. Include the effects of beam spreading and list any simplifying as- sumptions you make.
5.4 Explain why an antenna can be thought of as a transducer. 5.2 Describe what happens if a transmission line is not terminated in its characteristic impedance. 5.5 In a certain application, a Yagi-Uda antenna is used to receive a horizontally polarised signal. Sketch a four-element Yagi-Uda configuration to receive the signal
5.4 Explain why an antenna can be thought of as a transducer. 5.2 Describe what happens if a transmission line is not terminated in its characteristic impedance. 5.5...
If the period of a waveform is doubled, what happens to the frequency of that waveform? The frequency remains the same. The frequency doubles. The frequency becomes one-fourth as large. The frequency becomes four times as large. The frequency becomes half as large.
TA What happens to the On of a solution when the H3O+ is increased? Decreased? ANSWER:
TA What happens to the On of a solution when the H3O+ is increased? Decreased? ANSWER:
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