1-5
In a single-element transducer, what determines the diameter of the focus?
Diameter of the transducer
What is the depth of the focus? (Image)
9 cm
The Frensel zone is also known as the:
Near Zone
In a single-element transducer, what is the overall shape of the sound beam?
Hourglass
What is the diameter of the sound beam at a depth of 18 cm? (Image)
14 mm
Which of the following determines the focal depth of a sound beam?
Speed of sound in PZT and frequency
Frequency of sound and density of ceramic PZT
Diameter of transducer PZT and frequency of sound
Crystal thickness and impedance
Diameter of transducer PZT and frequency of sound
Which of the following statements is true regarding the term focal zone?
Region around the focus
Located one near zone length away from the transducer
Beam diameter is one-fourth the transducer diameter
Point where the beam is the narrowest
Region around the focus
Which of the following probes creates a beam with the least beam divergence?
8 mm diameter, 9 MHz
2 mm diameter, 8 MHz
5 mm diameter, 6 MHz
2 mm diameter, 4 MHz
8 mm diameter, 9 MHz
What is the relationship between sound beam divergence and crystal diameter?
Inverse
What is the best estimate of the diameter of the sound beam as it exits the transducer? (Image)
14 mm
The term used to describe the region between the transducer to the smallest cross-sectional area of a sound beam is:
Near zone
Which of the following terms accurately describes the shape of a Diffraction pattern?
V-shaped
Huygen's principle
Hourglass
Constructive inference
V-shaped
What is the diameter of the sound beam at a depth of 9 cm? (Image)
7 mm
The equation below represents:
(Crystal diameter2 x frequency) /6
Focal depth
Which of the following transducers has the shallowest focus?
4 MHz, 4 mm crystal diameter
4 MHz, 6 mm crystal diameter
6 MHz, 4 mm crystal diameter
6 MHz, 6 mm crystal diameter
4 MHz, 4 mm crystal diameter