Echoes. Reflection  The reflection of sound waves applies to frequencies above human hearing. 20 kHz is human maximum20 kHz is human maximum Bats can.

Slides:

Advertisements

Similar presentations

Sound too high to hear Ultrasound Slide 1. Slide 2.

Advertisements

إعداد : أ. بلسم فهد صوفي 1 Ultrasound in Medicine Ch.3 Ultrasound pictures of the body.

SOUND AND ULTRASOUND IN MEDICINE Prof. Dr. Moustafa. M. Mohamed Vice Dean Faculty of Allied Medical Science Pharos University Alexandria Dr. Yasser Khedr.

Ultrasound Dr.mervat mostafa.

Hospital Physics Group

Basic Physics of Ultrasound

ECE 501 Introduction to BME

Light and Sound Lecture 35 Reading: 15: 4-6 Problems: 15: 1, 4, 7, 13, 15, 17, 18.

Ultrasound Medical Imaging Imaging Science Fundamentals.

Ultrasound Imaging Atam Dhawan.

 Some animals such as bats, use ultrasound waves to detect obstacles and objects around them.  Ultrasounds are reflected of surfaces or objects and.

PRESENTATION BY ATIF DAR ULTRASONIC SENSORS.. CONTENTS PAGE Page 1 – Homepage Page 3 – Description of Ultrasonic Sensor. Page 4 – How the Ultrasonic Sensor.

Sound In Medicine. Sound waves Sound is a mechanical waves travel in air as longitudinal waves in which vibrations in air causes increases (compressions)

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

Ultrasound T1, T3, T4, T6 April 27, 2013.

Advancements in Ultrasounds A Presentation by: Jennifer Svoboda.

Ultrasonic Sensor Made By: 1.Hadeer Radwan 2.Alaa Mustafa 3.Amany Amr.

Section 1: Sound Preview Key Ideas Bellringer Properties of Sound

17.4 Sound and Hearing Sound waves are longitudinal waves that travel through a medium. Many behaviors of sound can be explained by using a few properties:

Sound Name: ________________ Class: _________________

Using Sound for many purposes

Sound Chapter 16.

感測器原理與應用.

Chapter 16.5: Using Sound Pg

13/10/2015 Physics 3 Sound. 13/10/2015 How sound travels… As we know, sound waves are formed when something vibrates. But how does the sound reach our.

Sound Overview The Facts of Sound The Ear and Sound Sound Vocabulary Musical Instruments and Sound.

1 Speed of Sound The speed of sound is 346 m/s at room temperature. The speed of sound depends on elasticity, density, and temperature of the medium.

Ultrasound L.O.: How can ultrasound be used to make images of unborn babies? What advantages does ultrasound imaging have over x-rays? How can ultrasound.

Sarah Gillies Ultrasound Sarah Gillies

Resident Physics Lectures

Sound Quality and Applications. Music vs. Noise Music –sounds that have a pleasing quality, a definite identifiable pitch, and rhythm –musical instruments.

EQ: How do different mediums affect the speed of sound?

Sound Chapter Properties of Sound Sound waves – Longitudinal Waves – Caused by vibrations – Carry energy outward, which hit your ear.

Periodic Motion Common Example: Pendulum Some elements of periodic motion we can describe –Oscillation or Cycle –Period, T –Frequency, f –Amplitude, A.

Sound. Characteristics of Sound Intensity of Sound: Decibels The Ear and Its Response; Loudness Interference of Sound Waves; Beats Doppler Effect Topics.

To know how ultra sound works and how it compares to x-rays.

Pendulum, Medical, Industrial

Artifacts Ultrasound Physics George David, M.S.

Sound Lesson 2. Previously… Sound as product of vibrations Longitudinal nature of sound Medium required for transmission of sound Differing speed of sound.

What we will do today: Investigate the range of human hearing. State what is meant by Ultrasound. Give one medical use of ultrasound in medicine. Give.

PHYSICS – Sound.

Echolocation III Ultrasound pictures. WHAT IS AN ULTRASOUND? Ultrasound uses energy in the form of sound waves that are of a higher frequency than the.

 Ultrasound waves are longitudinal with high frequencies ( ≈ > 20,000 Hz, though medical Ultrasound is between 1 to 15 MHz.)  When an ultrasound reaches.

Sound and LightSection 1 Properties of Sound 〉 What are the characteristics of sound waves? 〉 Sound waves are caused by vibrations and carry energy through.

What’s in the pictures?.

Waves & Sound The Nature of Sound  Speed of Sound  Human hearing  Doppler effect  Seeing with sound.

Intro to waves. The source of all waves is something that vibrates Wave Description.

~ Sound ~ The Nature of Sound  Speed of Sound  Human hearing  Doppler effect  “Seeing” with sound.

ANNA ARITA Sound Project. Essential Question: How do sound vibrations relate to the medical field?

TYPES OF IMAGINE & USES. Fluoroscopy  Technique for obtaining “live” X-ray images of a living patient  What systems most commonly used for?  Often.

Waves (I) S3 Physics

Prof. Sajid Naeem (DOES – PC)

Good if: you can explain what is meant by ultrasound.

1.) How do animals and people use sound?

Module 4 Waves, atoms & Space.

Peer Mark Wave Equation Practice

What links these two?.

Basic Physics of Ultrasound

Chapter 12, Section 4 Using Sound

The Physics of Sound.

Doppler Effect (continued from Lecture 13 - slides 7-12) Ultrasound

What we will do today: Carry out calculations involving ultrasound.

Imaging Techniques.

Waves A wave is a vibration (or oscillation) in space that transfers energy. Two types: transverse and longitudinal. Transverse: the wave vibrates at 90˚

9th Grade Science Chapter 12d

Sound Waves and Ultrasound

Presentation transcript:

Echoes

Reflection  The reflection of sound waves applies to frequencies above human hearing. 20 kHz is human maximum20 kHz is human maximum Bats can reach 100 kHzBats can reach 100 kHz 3.5 to 7 MHz are ultrasonic frequencies3.5 to 7 MHz are ultrasonic frequencies  Ultrasonic waves are short and make clean reflections.

Smile  Autofocus cameras use ultrasonic waves. A subject 2 m away Distance is 4 m Time = 4 m / (340 m/s)  Camera measures 12 ms.

Medical Ultrasound  Ultrasound transmits well though fluids.  It’s reflected from bone and firm tissues.  The transducer receives the echo and translates the time to depth.

Multiple Images  Each measurement reads a single line.  Multiple signals get a complete picture.

Sonogram  Each separate echo is a single dot.  The multiple signal traces provide additional dots.  Our brain (or a computer) connects the dots to get the image.