Physics Test 1 Outline - Ultrasound and Acoustic Waves part 1

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This set of flashcards covers key vocabulary and concepts related to ultrasound physics and acoustic waves, aiding in exam preparation.

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15 Terms

1
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Ultrasound

Sound waves with frequencies above 20,000 Hertz, used in medical imaging and other applications.

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Doppler Effect

Change in frequency of a wave in relation to an observer who is moving relative to the wave source.

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Pulse-Echo Technique

A method in ultrasound imaging where sound pulses are sent into the body and their echoes are detected to create an image.

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Microsecond

One millionth of a second, commonly used in measuring time intervals in ultrasound.

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Wavelength

The length of space occupied by one wave, important in determining sound quality in ultrasound.

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Frequency

Number of cycles of a wave that occur in one second, measured in Hertz.

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Acoustic Variables

Variations in physical quantities such as pressure, density, and distance that describe sound waves.

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Infrasound

Sound waves with frequencies below 20 Hertz, inaudible to humans.

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Propagation Speed

The speed at which sound travels through various media, affected by the medium's stiffness and density.

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Decibels

A logarithmic unit used to measure the intensity of sound, expressing the ratio of a given sound intensity to a reference intensity.

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Impedance

Resistance to the flow of sound waves in a medium, affecting the strength of reflections in ultrasound imaging.

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Scan Formats

Ways to display ultrasound images, including linear, sector, and blunted sector formats.

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Frequency and Period Relationship

Frequency is inversely related to period; if one increases, the other decreases, and vice versa.

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Scientific Notation

A shorthand method of writing very large or very small numbers using powers of ten.

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Acoustic Pressure

The force per unit area that sound waves exert on a medium, a crucial acoustic variable.