Attenuation In Ultrasound Physics



Attenuation In Ultrasound Physics

Sound waves are made of high pressure and low pressure pulses traveling through a medium. The high pressure areas (compression) are where the particles have been squeezed together; the low pressure areas (rarefaction) are where the particles have been spread apart. The wavelength of sound is the distance between two successive high pressure pulses or two successive low pressure pulses. Wavelength of sound decreases as frequency increases. The sound we normally hear is from 20 to 20 000 cycles per second. Ultrasound means sound that has a higher frequency than our normal hearing. Ultrasound ...