| A | B |
|---|
| Sound Definition | longitudinal, mechanical wave |
| Compressions | regions of high pressure and density |
| Rarefractions | regions of low pressure and density |
| Acoustic Variables- Pressure, Density, Distance | Determines acoustic waves (sound wave) or other type of wave |
| Ultrasound Travel Requirements | requires medium to propogate |
| Difference between ultra and audible sound | ultra-20MHZ audible- 20Hz to 20KHZ |
| Acousic Propagation Properties- Period, Freq, Amp, Pwr, Inten, Wavlth, Prop Speed | effects of medium on sound wave |
| Biologic Effects | effects of sound wave on biologic tissue |
| Sound travels in this... | straight line |
| Pressure Unit | Pascals |
| Density Unit | kg/cm3 |
| Distance Unit | cm, feet,mile |
| Acoustic Parameters | Describe's Characteristics of a sound wave |
| In-Phase | Peaks occur at the same time & location |
| Out-of-Phase | Peaks occur at different times |
| Constructive Interference | in-phase interference w/larger wave form |
| Destructive Interference | ou-of-phase interference, smaller wave form |
| Constructive and Destructive Interference | Waves of different Frequency |
