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Question | Answer |
---|---|
the term compression zone describes: | A region of high density or pressure in the wave |
Density particle motion temperature and pressure are considered | Acoustic variables |
The average speed of sound in soft tissue is | 1.54 millimeters per microsecond, 1.54 meters per millisecond, 1.54 km/s, 1540 M/s |
The unit which means cycles per second is the | Hertz |
Quartz crystal has the ability to emit an electrical signal when pressure is applied to it. This property is called the | Piezo electric effect |
Ultrasound is a form of | Periodic motion |
Which acoustic variable is measured in grams per centimeter cubed | Density |
Mass per unit volume equals | Density |
What remains constant is ultra sound propagate through the body? | Frequency |
What decreases as ultrasound propagates through the body? | Amplitude, intensity, power |
The distance of sound wave travels during one cycle is the | Wavelength |
What type of relationship do amplitude and power have? | Direct |
What type of relationship do stiffness and sound speed have? | Direct |
What type of. Relationship do frequency and period have? | Inverse |
What type of relationship do wavelength and intensity have? | Unrelated |
What type of relationship do frequency and velocity have? | Unrelated |
What is true of all waves? | They carry energy from one site to another |
True or false If the frequencies of two sound waves are identical, then the periods of the two waves must also be identical. | True |
What is the frequency of a wave determined by? | The crystal thickness |
What is the corresponding unit for wavelength? | M/Cycle |
How do high frequency wavelength compared to lower frequency wavelength? | Higher frequency waves have shorter wavelength |