ultrasound physics: quiz 1

x-axis

The horizontal axis of a graph.

Units associated with length

cm, feet.

1,000,000

A million is how much bigger than a thousand.

multiply

Converting a larger unit to a smaller unit requires you to multiply.

5,000,000

There are this many hertz in 5 MHz.

billion, giga, G

The meaning, prefix, and symbol of 10^9.

4

There are this many kilometers in 4000 meters.

0.001

The reciprocal of 1,000.

centi

The reciprocal term to hecto.

area

An ellipse can be used to measure this.

biological effects

Term used to describe effects of the sound wave as it passes through living tissue.

propagation speed

This is not an acoustic variable.

acoustic parameters

These describe sound waves.

longitudinal and mechanical

A sound wave is this type of wave.

constructive interference

What occurs when a pair of waves are in phase.

interference

The combination of waves that exist at the same location and time.

effects of the medium upon the sound wave

Definition of acoustic propagation property.

waves of different frequencies

Waves that will exhibit constructive AND destructive interference.

they carry energy from one place to another

This is true of ALL waves.

compressions

Areas of increased pressure and density.