Damping Study guides, Revision notes & Summaries

The fundamental or operating frequency - is affected by the thickness of the PZT element Which could not be used as the coupling medium (gel)? - barium sulfate The piezo electric effect is best described as - deformation from voltage sent to the crystals How thick is the element if the frequency is 3 MHz? - half the wavelength of the wave in the PZT The gel has greater impedance that the matching layer but less than the impedance of the PZT elements' - false The impedance of the PZT cryst...

In general, mold modifications are as follows: - Venting affects lows, damping the midrange and horn effects boost highs. Basic verification involves: - checking MCL and UCL in quiet and noise. Sound field is - a controlled environment The configuration and height of the tympanogram can be a factor in deciding the proper matrix for the fitting of a hearing aid: - A high Type A tells us to decrease the output by 2-3 dB You cannot use feedback checks when - checking the telephone coil ...

SPI Practice Test Questions & Answers 2024 Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - ANSWER-d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - ANSWER-d. Damping in a transducer a. reduces the number of cycles in a pulse and increases the quality factor b. increases the number of cycles in a pulse and incre...

Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - Answer- d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - Answer- d. Damping in a transducer a. reduces the number of cycles in a pulse and increases the quality factor b. increases the number of cycles in a pulse and increases penetration c. causes poor axial and lat...

ARDMS SPI PRACTICE TEST NEW 2023-2024 ALL DONE SOLUTION Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing Damping in a transducer a. reduces the number of cycles in a pulse and increases the quality factor b. increases the number of cycles in a pulse and increases penetr...

piezoelectric effect? CORRECT ANSWER property of certain materials to create a voltage when pressure is applied -indirect piezoelectric effect reverse piezoelectric effect? CORRECT ANSWER property of certain materials to deform when voltage is applied to them and create pressure (sound) -direct piezoelectric effect what piezoelectric material is used in ultrasound transducers? CORRECT ANSWER lead zirconate titanate (PZT) PZT crystal thickness? CORRECT ANSWER 1/2 wavelength thick ...

IHS(Internationa Hearing Society) EXAM 2024/ATUAL EXAMQUESTIONS WITH CORRECT DETAILED ANSWERS ALREADY GRADED A+ In general, mold modifications are as follows: Answer - Venting affects lows, damping the midrange and horn effects boost highs. Basic verification involves: Answer - checking MCL and UCL in quiet and noise. Sound field is Answer - a controlled environment

ARDMS SPI STUDY GUIDE QUESTIONS AND ANSWERS ALREADY PASSED In soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will... Remain the Same because stiffness and density affect Propagation Speed. What is the audible range? 20-20,000Hz >20,000Hz=Ultrasound Frequency is measured in Hertz (Hz) is Cycles per Second Not affected by sonographer Increase Frequency; Decrease Depth A period is the length of time it takes for one complete wavelength to pass a fixed poin...

In general, mold modifications are as follows: - Venting affects lows, damping the midrange and horn effects boost highs. Basic verification involves: - checking MCL and UCL in quiet and noise. Sound field is - a controlled environment The configuration and height of the tympanogram can be a factor in deciding the proper matrix for the fitting of a hearing aid: - A high Type A tells us to decrease the output by 2-3 dB You cannot use feedback checks when - checking the telephone coil ...

IHS(Internationa Hearing Society) EXAM 2024/ATUAL EXAMQUESTIONS WITH CORRECT DETAILED ANSWERS ALREADY GRADED A+ In general, mold modifications are as follows: Answer - Venting affects lows, damping the midrange and horn effects boost highs. Basic verification involves: Answer - checking MCL and UCL in quiet and noise. Sound field is Answer - a controlled environment