Acoustic impedance - Study guides, Class notes & Summaries

transducer Electronic pulses from the pulser are applied to the ? amplification, compensation, compression, and demodulation What functions are preformed by the receiver? the ratio of the maximum to the minimum intensity that can be displayed The dynamic range of an ultrasound system is described as? frequency divided by bandwidth How is the QF of a transducer determined? PZT The most common man-made crystal is : travel time and speed Which variables must be known in order to calculat...

ASNT level III Vocab words questions and answers 2024/2025 verified to passACOUSTIC EMISSION - correct answer Transient elastic waves resulting from local internal micro-displacements in a material ACOUSTIC EMISSION ACTIVITY - correct answer Number of bursts ( or events, if the approriate conditions are fulfilled) detected during test or part of test ACOUSTIC EMISSION EVENT - correct answer Micro-structural displacement that produces elastic waves in a material under load or stress ACOU...

ARDMS,SPI Exam Review (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A Q: What happens to axial resolution when spatial pulse length is decreased? Answer: improves Q: How much will a 3.5 MHz pulse be attenuated after passing through 2 cm of soft tissue? Answer: 3.5 dB Q: Propagation speed errors result in Answer: improper axial position Q: Enhancement is caused by Answer: weakly attenuating structures ...

0 dB HL does not mean what? - It does not mean that there is no sound at that level 0-25dB HL represents what? - Normal hearing range 90 dB HL represents what? - Typically the highest output level on a pure tone air conduction screening audiometer A laboratory value assigned to the individual porduct and not a reflection of what kind of attenuation the worker will ultimately recieve is called? - NRR Acoustic calibrations must be done? - Yearly Acoustic transformer, impedance matching syst...

what is the I SPPA for mechanical bioeffects? - Answer-190W/cm^2 what is the I SPTA for thermal bioeffects? - Answer-720mW/cm^2 recommended MI for fetal scanning - Answer-MI < 1.9 recommended TI for fetal scanning - Answer-TI < 0.7 after what fetal age is safe to use PW doppler? - Answer-14 weeks what does ALARA stand for - Answer-as low as reasonably achievable frequency - Answer-# of cycles/second f = 1/p period - Answer-time it takes for 1 cycle to occur (usec) P ...

SPI exam review questions & answers 2024 When using a 3-6MHz transducer, which frequency will offer the best penetration? - ANSWER-3MHz Which transducer component improves lateral resolution? - ANSWER-pulser 3. Mirrors and lenses can be used to ________________. • A. improve sound transmission into the body • B. increase the PRF of the transducer • C. electronically focus the US beam • D. mechanically focus the US beam - ANSWER-D. mechanically focus the US beam 4. Wh...

ARDMS – SPI Exam Questions With Verified And Updated Solutions. What type of wave is a sound wave? - answerlongitudinal, mechanical molecules of the medium vibrate at 90 degrees to the direction of the traveling wave - answertransverse wave what is the range of audible sound? - answer20 Hz to 20 kHz portion of a cycle where the molecules are pushed closer together - answercompression portion of a cycle where the molecules spread farther apart - answerrarefaction what are the three prim...

2024 CNIM Exam New Full Exam Questions and Answers ( Included ) 100% Correct 1. Which of the following would best enhance resolution of evoked potentialwaveforms? Answer: Increase number of averaged stimuli 2. What is the typical MINIMUM common mode rejection ratio of in-phasesignals recommended for evoked potential instruments? Answer: 10,000:1 3. Which of the following cranial nerves is most at risk during acoustic neuro-ma surgery? Answer: CN VII 4. The impedance of cup electrodes ...

Of the following sound wave modes, which one has multiple or varying wave velocities? a. Longitudinal waves b. Shear waves c. Transverse waves d. Lamb waves - ️️Lamb waves Which of the following would be considered application(s) of ultrasonic techniques? a. Determination of a materials elastic modulus b. Study of a materials metallurgical structure c. Measurement of a materials thickness d. All of the above - ️️All of the above The only significant sound wave mode that wil...

Of the following sound wave modes, which one has multiple or varying wave velocities? a. Longitudinal waves b. Shear waves c. Transverse waves d. Lamb waves - ️️Lamb waves Which of the following would be considered application(s) of ultrasonic techniques? a. Determination of a materials elastic modulus b. Study of a materials metallurgical structure c. Measurement of a materials thickness d. All of the above - ️️All of the above The only significant sound wave mode that wil...