Biomedical Engineering > GATE 2024 > Ultrasound
If a circular ultrasound transducer of radius a=8 mm operating at a central frequency of 1 MHz has a pressure beam pattern in a medium as given below:
P(r,0)∝sin(ka2/4r)
Here, k is the wave number, r is the axial distance from the transducer face, and the speed of sound in the medium is 1600 ms⁻¹. The reduction in intensity between r=8 cm and r=16 cm is _________ dB. Give your answer as a positive quantity.
P(r,0)∝sin(ka2/4r)
Here, k is the wave number, r is the axial distance from the transducer face, and the speed of sound in the medium is 1600 ms⁻¹. The reduction in intensity between r=8 cm and r=16 cm is _________ dB. Give your answer as a positive quantity.
Correct : 6.02
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