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24 Cards in this Set
- Front
- Back
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Sound wave needs a
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Medium
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Sound wave moves in
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a straight line
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Sound wave is a _________ wave
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Longitudial/mechanical
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Sound wave is a _____ variation
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pressure
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3MHz=
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3,000,000,000 Million cycles per second
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Propagation speed is determined by the
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Medium
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A Dense object will have a ______ Prop speed
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Low
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A low density object will have a _______ prop speed
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Higher
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A Hard Object will have a ________ prop speed
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faster
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A soft object will have a _____ prop speed
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slow
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Negative Interference is when
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two waves meet, their intensity and amplitudes are subtracted from eachother
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Positive Interference
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When two waves meet, their intensitys and amplitude are added to eachother
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_______ decreases with high freq
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Period, Wavelength, SPL, and PD
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a small # of SPL leads to
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improved image resolution
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Duty factor is ____
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Unitless
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Attenuation
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Loss if intensity power and amplitude
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Incident Intesnsity
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Sound/Intensity that comes from the TX to the medium
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Reflected Intensity
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Sound that leaves the TX and comes back to the TX from a boundry or a medium
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Transmitted Intensity
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Sound leaves the TX, Hits a medium, and continues to the next medium
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Tx converts one form of ______ into ______
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energy/another
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Piezoelectric effect converts
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sound into electricity (Echo)
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Reverse Piezoelectic effect converts
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Electricty into sound (Pulse)
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Curie point
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360 C
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Operating frequency is determined by
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width of TX and thickness of crystals
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