Describing Sound waves powerpoint Notes

Flashcards based on lecture notes for CVT 1610C Ultrasound Physics at the College of Central Florida.

What do parameters describe?

Features or attributes of a sound wave.

What is the period of a sound wave?

Time from the start of one cycle to the start of the next. Units are microseconds.

What is frequency?

Number of cycles per second (Hertz).

What is the frequency of Ultrasound?

Greater than 20 kHz

How do period and frequency relate?

Inversely related. As frequency increases, period decreases.

What is the frequency of Infrasound?

Less than 20Hz

What is the frequency of Audible sound (human)?

20Hz-20kHz

What is amplitude?

Difference between the maximum/minimum and baseline, expressed in pascals, g/cm3, or distance.

What is power (sound source)?

Rate of energy transfer, measured in watts.

What is intensity (sound source)?

Concentration of energy in a sound beam, measured in Watts per area.

What is wavelength?

Distance of one complete cycle, measured in length units (mm).

What is propagation speed?

Distance the sound wave travels through a medium in one second, measured in meters per second.

What is the speed of sound in soft tissue?

1540 m/s

What is pressure?

Force per area.

What is density?

Concentration of mass in a volume.