©Cleaning Technologies Group. Sound... Sound Is Vibration Transmitted Through an Elastic Material...

©Cleaning Technologies Group

Sound . . .Sound . . .Sound Is Vibration Transmitted Through an Elastic Material

UltraSound . . .UltraSound . . .Sound at a Higher Frequency

UltraSound

Sound is Created by a Source of Vibration

Think of the black line above as the edge view of a metal plate

Now Imagine an “Ultrasonic Transducer” Attached to the Metal Plate

Ultrasonic Transducer

The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate

Ultrasonic Transducer

Now Imagine that the Metal Plate is the Bottom of a Vessel or “Tank”

And that the Tank is Filled with Liquid

Now Let’s Re-Start the Vibration

As the tank bottom raises, it pushes against the liquid thereby

compressing it. The blue represents an area of “compression”.

The “compression” continues to travel through the liquid away from the source of vibration.

As the tank bottom lowers it “pulls” on the liquid creating an area of negative pressure

or “rarefaction”

Continued vibration generates areas of

compression and rarefaction radiating through the liquid

Now add a pressure gauge to measure pressure at a given point in the liquid

As the rarefactions and compressions of the sound waves pass by, the gauge sees alternating negative and positive pressure

A vibrating source transmits sound waves to a liquid.

Sound waves, consisting of areas of rarefaction (negative pressure) and compression (positive pressure), radiate through the liquid away from the source of vibration.

Imagine now a small defect in the liquid consisting of a bubble or speck of dirt

The a “cavitation bubble” starts to grow around the defect under influence of negative pressure

Growth of the “cavitation bubble” continues and

accelerates under increasingly negative pressure

The “cavitation bubble” shrinks under the influence of growing

positive pressure

The catastrophic collapse of the cavitation bubble under

increasing pressure results in implosion!

The high energy resulting from the implosion of millions of

cavitation bubbles do the work associated with ultrasonics

©Cleaning Technologies Group. Sound... Sound Is Vibration Transmitted Through an Elastic Material...

Documents

Chapter 3 Ultrasound Applications in Food Processingh-asadi.com/msc/US.pdf · Chapter 3 Ultrasound Applications in Food Processing ... Ultrasound consists of a series of sound waves

Combining Light & Sound Can ultrasound become the preferred modality for functional and molecular imaging? Shai Ashkenazi Biomedical Ultrasound Lab Dept

Ultrasound TODAY - Sound Ergonomics

Ultrasound During Pregnancy - St. Joseph Hospital During Preg… · Ultrasound During Pregnancy Ultrasound imaging, also known as sonography, uses inaudible sound wavesto produce

Background Image: Seeing With Sound - An introduction to Ultrasound

· Web viewis the movement of animals in response to sound vibrations especially the sound vibrations in the ultrasound range. Even though human ear cannot sense ultrasound, many animal

Ultrasound Imaging: Lecture 2 Absorption Reflection Scatter Speed of sound Signal modeling Signal Processing Statistics Interactions of ultrasound with

Sound Waves and Ultrasound. Sound Waves Sound waves are mechanical Require a medium for transmission Sound is formed by the vibration or movement of

Acoustics. Sound mechanical oscillation 20Hz - 20kHz – audible sound 0,7Hz - 20Hz – infrasound 20kHz – hundreds of MHz - ultrasound

Ultrasound Physics Sound is a mechanical, longitudinal wave that travels in a straight line Sound requires a medium through which to travel Ultrasound

Industrial Applications of Ultrasound - class 9 - physics (sound)

Davies Publishingdaviespublishing.com/.../sample-18010.pdf · ultrasound encompasses sonography and Doppler ultra- sound. Doppler ultrasound includes the detection, quan- tization,

Section 13.3 Audible Sound and Ultrasound

Ultrasound By : Saja Abdo. Objectives: History Physics of ultrasound 1. basic principles of sound 2. principles of ultrasound 3. how ultrasound wave impact

Patient Data Management SystemELECTROTHERAPY & ULTRASOUND 2782K – Intelect Transport Ultrasound Standard Accessories 27383cm² Sound Head Applicator – 5 4248 – ConductorTM Ultrasound

Emergency Ultrasound Course7 Doppler The Doppler shift is the difference in sound frequency between the US beam transmitted into tissue and the echo produced by reflection from the

High Intensity Focused Ultrasound - Semantic Scholar€¦ · High Intensity Focused Ultrasound Figure 1. Similar to sound, the key parameters of ultrasound are wave amplitude and

SOUND AND ULTRASOUND SOURCE DIRECTION OF .../ecasp/publications/Thesis/Vitaliy Kunin...SOUND AND ULTRASOUND SOURCE DIRECTION OF ARRIVAL ESTIMATION AND LOCALIZATION BY VITALIY KUNIN

Ultrasound TODAY - Sound Ergonomics Pediatric Ultrasound Today, and Vascular Ultrasound To-day in the fall of 2001, with a request that recipients distribute

Ultrasound Imaging - k-space.org · Doppler Ultrasound Example: Consider Doppler imaging of a vessel at depth d1= 10 cm. derive the maximum detectible velocity if the transmitted