SlideShare a Scribd company logo
The generation and use of
ultrasound
Piezo-electric effect
• Key Points
• Ultrasound – is sound waves above the range of human
hearing 20kHz.
• Ultrasound – is produced by a piezo-electric
transducer.
• The transducer converts electrical energy into sound
energy.
• Piezo-electric transducers make use of piezo-electric
crystals such as quartz.
• Quartz is made up of a
large number of silicate
units.
• Which comprised of
positively charged
silicon ions and
negatively charged
oxygen ions.
• When a potential
difference is applied to the
crystal . The resulting
electric field will cause
forces on the positive and
negative ions.
• The ions are not held
rigidly and so the ions will
slightly displace.
• Depending on the direction
of the electric field, this
displacement of the ions
will either make the crystal
become slightly thinner or
slight thicker.
+ + + +
- - - -
The opposite surfaces of
the crystal are silvered to
act as electrodes.
• When an alternating voltage is applied to the crystal, the crystal
will alternate between, becoming thinner and becoming thicker,
with a frequency that matches the applied potential difference.
• The amplitude of the vibrations is usually very small. However, if
the frequency of the ac voltage matches the natural frequency
of the crystal, then resonance occurs and the amplitude of
vibrations will be much larger.
• These vibrations can generate sound waves of high frequencies
(greater than 20kHz) i.e. ultrasound.
• The reverse also happens as well, i.e. if the crystal is subjected
to an alternating force such as a ultrasound wave. Then this will
cause the ions to displace slightly and as such will create a
potential difference across the ends of the crystal.
Piezo-electric transducer/receiver
When an alternating voltage is applied the crystal will produce
an ultrasound wave
When the crystal receives an ultrasound wave, the crystal will
produce a potential difference.
So the transmitter can also act as a receiver of ultrasound
waves.

More Related Content

Similar to 1. Ultrasound Basics.pptx

frequency meters.pptx
frequency  meters.pptxfrequency  meters.pptx
frequency meters.pptx
tadi1padma
 
Production of x rays
Production of x rays Production of x rays
Production of x rays
VIneeth C
 
ULTRASONIC wave
ULTRASONIC waveULTRASONIC wave
ULTRASONIC wave
Sathees Physics
 
Ultrasonics
UltrasonicsUltrasonics
Ultrasonics
MayankSharma1142
 
ultrasonic.pptx
ultrasonic.pptxultrasonic.pptx
ultrasonic.pptx
Raja Shekar
 
Ultrasonics
UltrasonicsUltrasonics
Ultrasonics
Abhishek Nirmal
 
usgphysics-151102111226-lva1-app6892.pdf
usgphysics-151102111226-lva1-app6892.pdfusgphysics-151102111226-lva1-app6892.pdf
usgphysics-151102111226-lva1-app6892.pdf
littlealphonsa
 
ULTRASOUND PHYSICS
ULTRASOUND PHYSICSULTRASOUND PHYSICS
ULTRASOUND PHYSICS
Navni Garg
 
Radioactivity and production of X-rays - Sachin
Radioactivity and production of X-rays - SachinRadioactivity and production of X-rays - Sachin
Radioactivity and production of X-rays - Sachin
SACHINS700327
 
Crystal oscillator
Crystal oscillatorCrystal oscillator
Crystal oscillator
yash sawarkar
 
B.Tech sem I Engineering Physics U-V Chapter 2-Ultrasonic waves
B.Tech sem I Engineering Physics U-V Chapter 2-Ultrasonic wavesB.Tech sem I Engineering Physics U-V Chapter 2-Ultrasonic waves
B.Tech sem I Engineering Physics U-V Chapter 2-Ultrasonic waves
Abhi Hirpara
 
BTech_Unit_I.pptx Ultrasonic sound ppt for students
BTech_Unit_I.pptx  Ultrasonic sound ppt for studentsBTech_Unit_I.pptx  Ultrasonic sound ppt for students
BTech_Unit_I.pptx Ultrasonic sound ppt for students
MayureshMane7
 
UNIT II-microwave sources (1).pptx
UNIT II-microwave sources (1).pptxUNIT II-microwave sources (1).pptx
UNIT II-microwave sources (1).pptx
PavanVangapally
 
Ultrasound therapy
Ultrasound therapyUltrasound therapy
Ultrasound therapy
Muthuukaruppan
 
Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Ultrasoundtherapy 150201220726-conversion-gate02 (1)Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Michael Selvaraj
 
Usg physics
Usg physicsUsg physics
Usg physics
KaneezFatima797461
 
ultrasonic
ultrasonicultrasonic
ultrasonic
stanley christy
 
Production of xrays
Production of xraysProduction of xrays
Production of xrays
priyanka rana
 
Polarisation
PolarisationPolarisation
Polarisation
Krupesh Anadkat
 
Piezo electric transducer
Piezo electric transducerPiezo electric transducer
Piezo electric transducer
arvind venkat
 

Similar to 1. Ultrasound Basics.pptx (20)

frequency meters.pptx
frequency  meters.pptxfrequency  meters.pptx
frequency meters.pptx
 
Production of x rays
Production of x rays Production of x rays
Production of x rays
 
ULTRASONIC wave
ULTRASONIC waveULTRASONIC wave
ULTRASONIC wave
 
Ultrasonics
UltrasonicsUltrasonics
Ultrasonics
 
ultrasonic.pptx
ultrasonic.pptxultrasonic.pptx
ultrasonic.pptx
 
Ultrasonics
UltrasonicsUltrasonics
Ultrasonics
 
usgphysics-151102111226-lva1-app6892.pdf
usgphysics-151102111226-lva1-app6892.pdfusgphysics-151102111226-lva1-app6892.pdf
usgphysics-151102111226-lva1-app6892.pdf
 
ULTRASOUND PHYSICS
ULTRASOUND PHYSICSULTRASOUND PHYSICS
ULTRASOUND PHYSICS
 
Radioactivity and production of X-rays - Sachin
Radioactivity and production of X-rays - SachinRadioactivity and production of X-rays - Sachin
Radioactivity and production of X-rays - Sachin
 
Crystal oscillator
Crystal oscillatorCrystal oscillator
Crystal oscillator
 
B.Tech sem I Engineering Physics U-V Chapter 2-Ultrasonic waves
B.Tech sem I Engineering Physics U-V Chapter 2-Ultrasonic wavesB.Tech sem I Engineering Physics U-V Chapter 2-Ultrasonic waves
B.Tech sem I Engineering Physics U-V Chapter 2-Ultrasonic waves
 
BTech_Unit_I.pptx Ultrasonic sound ppt for students
BTech_Unit_I.pptx  Ultrasonic sound ppt for studentsBTech_Unit_I.pptx  Ultrasonic sound ppt for students
BTech_Unit_I.pptx Ultrasonic sound ppt for students
 
UNIT II-microwave sources (1).pptx
UNIT II-microwave sources (1).pptxUNIT II-microwave sources (1).pptx
UNIT II-microwave sources (1).pptx
 
Ultrasound therapy
Ultrasound therapyUltrasound therapy
Ultrasound therapy
 
Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Ultrasoundtherapy 150201220726-conversion-gate02 (1)Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Ultrasoundtherapy 150201220726-conversion-gate02 (1)
 
Usg physics
Usg physicsUsg physics
Usg physics
 
ultrasonic
ultrasonicultrasonic
ultrasonic
 
Production of xrays
Production of xraysProduction of xrays
Production of xrays
 
Polarisation
PolarisationPolarisation
Polarisation
 
Piezo electric transducer
Piezo electric transducerPiezo electric transducer
Piezo electric transducer
 

Recently uploaded

Medical Orthopedic PowerPoint Templates.pptx
Medical Orthopedic PowerPoint Templates.pptxMedical Orthopedic PowerPoint Templates.pptx
Medical Orthopedic PowerPoint Templates.pptx
terusbelajar5
 
在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
vluwdy49
 
SAR of Medicinal Chemistry 1st by dk.pdf
SAR of Medicinal Chemistry 1st by dk.pdfSAR of Medicinal Chemistry 1st by dk.pdf
SAR of Medicinal Chemistry 1st by dk.pdf
KrushnaDarade1
 
Thornton ESPP slides UK WW Network 4_6_24.pdf
Thornton ESPP slides UK WW Network 4_6_24.pdfThornton ESPP slides UK WW Network 4_6_24.pdf
Thornton ESPP slides UK WW Network 4_6_24.pdf
European Sustainable Phosphorus Platform
 
8.Isolation of pure cultures and preservation of cultures.pdf
8.Isolation of pure cultures and preservation of cultures.pdf8.Isolation of pure cultures and preservation of cultures.pdf
8.Isolation of pure cultures and preservation of cultures.pdf
by6843629
 
Authoring a personal GPT for your research and practice: How we created the Q...
Authoring a personal GPT for your research and practice: How we created the Q...Authoring a personal GPT for your research and practice: How we created the Q...
Authoring a personal GPT for your research and practice: How we created the Q...
Leonel Morgado
 
Basics of crystallography, crystal systems, classes and different forms
Basics of crystallography, crystal systems, classes and different formsBasics of crystallography, crystal systems, classes and different forms
Basics of crystallography, crystal systems, classes and different forms
MaheshaNanjegowda
 
The debris of the ‘last major merger’ is dynamically young
The debris of the ‘last major merger’ is dynamically youngThe debris of the ‘last major merger’ is dynamically young
The debris of the ‘last major merger’ is dynamically young
Sérgio Sacani
 
Shallowest Oil Discovery of Turkiye.pptx
Shallowest Oil Discovery of Turkiye.pptxShallowest Oil Discovery of Turkiye.pptx
Shallowest Oil Discovery of Turkiye.pptx
Gokturk Mehmet Dilci
 
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defectsThe binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
Sérgio Sacani
 
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills MN
 
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptxThe use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
MAGOTI ERNEST
 
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdfwaterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
LengamoLAppostilic
 
Applied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdfApplied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdf
University of Hertfordshire
 
molar-distalization in orthodontics-seminar.pptx
molar-distalization in orthodontics-seminar.pptxmolar-distalization in orthodontics-seminar.pptx
molar-distalization in orthodontics-seminar.pptx
Anagha Prasad
 
ESR spectroscopy in liquid food and beverages.pptx
ESR spectroscopy in liquid food and beverages.pptxESR spectroscopy in liquid food and beverages.pptx
ESR spectroscopy in liquid food and beverages.pptx
PRIYANKA PATEL
 
Compexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titrationCompexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titration
Vandana Devesh Sharma
 
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
University of Maribor
 
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
THEMATIC  APPERCEPTION  TEST(TAT) cognitive abilities, creativity, and critic...THEMATIC  APPERCEPTION  TEST(TAT) cognitive abilities, creativity, and critic...
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
Abdul Wali Khan University Mardan,kP,Pakistan
 
Phenomics assisted breeding in crop improvement
Phenomics assisted breeding in crop improvementPhenomics assisted breeding in crop improvement
Phenomics assisted breeding in crop improvement
IshaGoswami9
 

Recently uploaded (20)

Medical Orthopedic PowerPoint Templates.pptx
Medical Orthopedic PowerPoint Templates.pptxMedical Orthopedic PowerPoint Templates.pptx
Medical Orthopedic PowerPoint Templates.pptx
 
在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
 
SAR of Medicinal Chemistry 1st by dk.pdf
SAR of Medicinal Chemistry 1st by dk.pdfSAR of Medicinal Chemistry 1st by dk.pdf
SAR of Medicinal Chemistry 1st by dk.pdf
 
Thornton ESPP slides UK WW Network 4_6_24.pdf
Thornton ESPP slides UK WW Network 4_6_24.pdfThornton ESPP slides UK WW Network 4_6_24.pdf
Thornton ESPP slides UK WW Network 4_6_24.pdf
 
8.Isolation of pure cultures and preservation of cultures.pdf
8.Isolation of pure cultures and preservation of cultures.pdf8.Isolation of pure cultures and preservation of cultures.pdf
8.Isolation of pure cultures and preservation of cultures.pdf
 
Authoring a personal GPT for your research and practice: How we created the Q...
Authoring a personal GPT for your research and practice: How we created the Q...Authoring a personal GPT for your research and practice: How we created the Q...
Authoring a personal GPT for your research and practice: How we created the Q...
 
Basics of crystallography, crystal systems, classes and different forms
Basics of crystallography, crystal systems, classes and different formsBasics of crystallography, crystal systems, classes and different forms
Basics of crystallography, crystal systems, classes and different forms
 
The debris of the ‘last major merger’ is dynamically young
The debris of the ‘last major merger’ is dynamically youngThe debris of the ‘last major merger’ is dynamically young
The debris of the ‘last major merger’ is dynamically young
 
Shallowest Oil Discovery of Turkiye.pptx
Shallowest Oil Discovery of Turkiye.pptxShallowest Oil Discovery of Turkiye.pptx
Shallowest Oil Discovery of Turkiye.pptx
 
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defectsThe binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
 
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
 
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptxThe use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
 
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdfwaterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
 
Applied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdfApplied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdf
 
molar-distalization in orthodontics-seminar.pptx
molar-distalization in orthodontics-seminar.pptxmolar-distalization in orthodontics-seminar.pptx
molar-distalization in orthodontics-seminar.pptx
 
ESR spectroscopy in liquid food and beverages.pptx
ESR spectroscopy in liquid food and beverages.pptxESR spectroscopy in liquid food and beverages.pptx
ESR spectroscopy in liquid food and beverages.pptx
 
Compexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titrationCompexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titration
 
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
 
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
THEMATIC  APPERCEPTION  TEST(TAT) cognitive abilities, creativity, and critic...THEMATIC  APPERCEPTION  TEST(TAT) cognitive abilities, creativity, and critic...
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
 
Phenomics assisted breeding in crop improvement
Phenomics assisted breeding in crop improvementPhenomics assisted breeding in crop improvement
Phenomics assisted breeding in crop improvement
 

1. Ultrasound Basics.pptx

  • 1. The generation and use of ultrasound
  • 2. Piezo-electric effect • Key Points • Ultrasound – is sound waves above the range of human hearing 20kHz. • Ultrasound – is produced by a piezo-electric transducer. • The transducer converts electrical energy into sound energy. • Piezo-electric transducers make use of piezo-electric crystals such as quartz.
  • 3. • Quartz is made up of a large number of silicate units. • Which comprised of positively charged silicon ions and negatively charged oxygen ions.
  • 4. • When a potential difference is applied to the crystal . The resulting electric field will cause forces on the positive and negative ions. • The ions are not held rigidly and so the ions will slightly displace. • Depending on the direction of the electric field, this displacement of the ions will either make the crystal become slightly thinner or slight thicker. + + + + - - - - The opposite surfaces of the crystal are silvered to act as electrodes.
  • 5. • When an alternating voltage is applied to the crystal, the crystal will alternate between, becoming thinner and becoming thicker, with a frequency that matches the applied potential difference. • The amplitude of the vibrations is usually very small. However, if the frequency of the ac voltage matches the natural frequency of the crystal, then resonance occurs and the amplitude of vibrations will be much larger. • These vibrations can generate sound waves of high frequencies (greater than 20kHz) i.e. ultrasound. • The reverse also happens as well, i.e. if the crystal is subjected to an alternating force such as a ultrasound wave. Then this will cause the ions to displace slightly and as such will create a potential difference across the ends of the crystal.
  • 6. Piezo-electric transducer/receiver When an alternating voltage is applied the crystal will produce an ultrasound wave When the crystal receives an ultrasound wave, the crystal will produce a potential difference. So the transmitter can also act as a receiver of ultrasound waves.