RIU 320 Lecture Notes - Lecture 23: Longitudinal Wave, Sound, Transverse Wave

• School: GVSU
• Department: Radiation and Imaging - Ultrasound
• Course: RIU 320
• Professor: Angela Malone

Document Summary

In diagnostic ultrasonography, sound pulses created by a transducer travel through biologic tissue or media. Reflections arising from boundaries between structures in the body return to the transducer and are processed into images. Sound waves: all waves carry energy from one location to another. Many different forms of waves exist, including heat, sound, magnetic, and light. Ii: sound is a mechanical wave in which particles in a medium move, sound is mechanical= medium, the molecules in the medium vibrate back and forth in a fixed position. Acoustic variables: sound waves are identified by oscillations in acoustic variables. Three acoustic variables- pressure, density, and distance - are used to distinguish between sound waves and other types of waves: if one of these acoustic variables has a rhythmic oscillation, then the wave is a sound wave. Acoustic parameters: seven acoustic parameters are used to accurately describe the characteristics of a sound wave, period, frequency, amplitude, power, intensity, wavelength, and propagation speed.