Ultrasound wave propagation and parameters

Ultrasound waves are acoustic pressure waves that interact with propagation media. Ultrasound visualization normally is based on wave reflectance from regions with different acoustic properties. When wave meets different acoustic media, part of it transmits further while other reflects. This happens due to different acoustic impedance. The ration between reflected and transmitted energy purely depends on difference of acoustic impedance in both regions. As you can see each material can be characterized by its acoustic impedance Z which is equal to ultrasound speed v and material density r.

Ultrasound waves and propagation

It is more than 100 years when ultrasound is used for analyzing materials and echolocation. A bit later it was adapted for medical diagnostics. Ultrasound became popular and wide spread due to number of benefits. Probably one of the most important feature is that it is non destructive. Other that follow are simplicity and precision. Of course when we talk about price and simplicity we have X-ray or tomography in mind. Ultrasound can be used in many areas and environments. You can measure geometrical properties of internal structures, physical properties like density, tension. In medical diagnosis ultrasound is mostly used for visualization of tissues and inner organs. Ultrasound waves and parameters Ultrasound waves are mechanical waves that propagate through media. In solid materials ultrasound waves propagate faster while in liquids and biological tissues slower (~1400 m/s). In air due to low density sound waves propagate relatively slowly (~340 m/s). Ultrasound …

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