Acoustic impedance - Study guides, Class notes & Summaries

ARDMS SPI Test (2024) || Questions & Answers (100% Correct) ARDMS SPI Test (2024) || Questions & Answers (100% Correct) Half value layer depends upon what? - ANSWER - Medium and frequency The attenuation of an acoustic wave traveling through bone is ____ its attenuation through soft tissue - ANSWER - greater than Sound traveling through blood attenuations to a ___ extent than soft tissue - ANSWER - lesser Name media with increasing attenuation of ultrasound - ANSWER - water,bloo...

OCR A LEVEL PHYSICS ,OCR A-LEVEL PHYSICS REAL EXAM WITH QUESTIONS AND ANSWERS [ALREADY GRADED A+} impedance matching - ANS---use of two substances of similar acoustic impedances to minimise reflection of ultrasound at the boundary between them activity - ANS---rate at which nuclei in a radioactive source decay, measured in becquerels alpha radiation - ANS---ionising radiation consisting of particles resembling a helium nucleus with a charge of +2e air resistance - ANS---resist...

SPI Practice Test Questions and Answers 2023 Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing 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 penet...

There are two types of sleep studies: CORRECT ANSWER 1. Overnight polysomnograms (PSGs) 2. Daytime nap studies list the types of overnight polysomnograms: CORRECT ANSWER could be level 1 or 2, seizure montages, CPAP titrations, etc list the types of daytime nap studies: CORRECT ANSWER multiple sleep latency test, maintenance of wakefulness test list the required equipment and components of a routine PSG (level 1): CORRECT ANSWER - EEG or electroencephalogram (a minimum of F4/M1, C4/M1...

ARDMS SPI Exam Questions and Verified Answers A sound wave is - CORRECT ANSWER-mechanical, longitudinal A compression area of a sound wave is - CORRECT ANSWER-high pressure, high density A rarefaction area of a sound wave is - CORRECT ANSWER-low pressure, low density Which is considered an acoustic variable - CORRECT ANSWER-pressure Which is a unit for pressure - CORRECT ANSWER-N/m2 Which is a unit for density - CORRECT ANSWER-lbs/cm3 Which wave propagates in a medium - CORRECT ANSWER...

Mock Exam #3 Hearing Aid Dispenser Questions & Answers Verified 100% Correct!! If your patient has a fenestrated canal you would have to do which of the following when taking ear impressions: a. Use large or multiple otoblocks b. use normal type of otoblock c. use normal type of otoblock, but with the X-type of string d. none of the above a. Use large or multiple otoblocks If your patient is using a device on their hearing aid to exclude room conversation but is able to hear on the tele...

form of energy to another form of energy what does an ultrasound transducer do? correct answer: converts electropotential energy into mechanical and mechanical energy into electropotential energy what is the curie point? correct answer: if a crystal is heated beyond the curie point (360 degrees for PZT) the crystal can lose piezoelectric effects what material is traditionally used for ultrasound trasnducers? correct answer: Lead ziconate titanate (PZT) what are modern transducers ...

CAOHC EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATED (100% SOLVED) What is the purpose of the OHC? - answers-Providing resources and guidance to facilitate the practice of hearing loss prevention through standardized training and credentialing What is the difference between the requiremtns of OSHA and the recommendations of NIOSH? - answersNIOSH refers to research and recoomendations. OSHA regulates and implements. What are examples of auditory effects on hearing and damage risks? -...

Sonography Canada - Core Exam Questions and Answers A+ Score. 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 - ANS...

Ultrasound Sound generated above the human hearing range (typically 20 kHz) is called ultrasound frequency (f) The number of cycles completed in one second (cyrcle/second) the period (T) The time required to complete a full cycle The relation between frequency and period The relation between c, f, l and T Propagation распространение The longitudinal wave is a compressional wave in which the particle motion is in the same direction as the propagat...