Properties of traveling waves: Acoustics applications

Slides:

Advertisements

Similar presentations

1308 E&M Diffraction – light as a wave Examples of wave diffraction: Water waves diffract through a small opening in the dam. Sound waves diffract through.

Advertisements

Diffraction at a single slit Sketch the variation with angle of diffraction of the relative intensity of light diffracted at a single slit

Properties of Waves. The Ripple Tank To study waves, we will use a ripple tank. A ripple tank works by having a wave generating probe produce a continuous.

Characteristics of Waves

Objectives Identify how waves transfer energy without transferring matter. Contrast transverse and longitudinal waves. Relate wave speed, wavelength, and.

O Level Physics Chapter :11: Properties of Waves

Speed of Waves Speed of waves in strings (review): Speed of longitudinal waves in a solid rod: E - Young’s modulus - density m - mass V - volume F - tension.

Interference Physics 202 Professor Lee Carkner Lecture 24.

Waves. What are waves? Wave: a disturbance that transfers energy from place to place. (Energy from a wave of water can lift a boat.) Medium: –the state.

Waves. What are waves? Wave: a disturbance that transfers energy from place to place. (Energy from a wave of water can lift a boat.) Medium: –the state.

PROPERTIES OF TRAVELLING WAVES Physics of Music, Spring 2015.

Waves Topic 4.5 Wave Properties. Wave Behaviour v Reflection in one dimension.

CHAPTER 12- WAVES. WHAT IS A WAVE? Mechanical waves vs non-mechanical waves?

Vocabulary you’ll need … Read in the textbook Chapter 25- Vibrations and Waves.

Wave Characteristics. Terms to Review Parts of a Wave – Crest – Trough – Pulse – Amplitude – Wavelength – Frequency – Period Types of Waves – Mechanical.

Waves Topic 4.5 Wave Properties. Wave Behavior  Reflection in one dimension.

Chapter 7 Light and Geometric Optics

Diffraction at a single slit Sketch the variation with angle of diffraction of the relative intensity of light diffracted at a single slit

Chapter 15 4 Wave Motion. Section 15-1: Simple Wave Motion Transverse and Longitudinal Waves A transverse wave.

What is a wave?  A wave is a transfer of energy from one point to another via a traveling disturbance  A wave is characterized by its wavelength, frequency,

Chapter Twenty-Three: Waves  23.1 Harmonic Motion  23.2 Properties of Waves  23.3 Wave Motion.

Physics Review Day 3. Waves A wave is a repetitive motion that transfers energy through matter or space There are two types of waves: –Transverse –Longitudinal.

This is one type of wave…. wave Wave a disturbance that propagates through a material medium or space. Waves transfer energy without the bulk transport.

Fundamental Physics II PETROVIETNAM UNIVERSITY FACULTY OF FUNDAMENTAL SCIENCES Vungtau, 2013 Pham Hong Quang

Spring Constant, K The constant k is called the spring constant. SI unit of k = N/m.

Physics 106 Lesson #27 Dr. Andrew Tomasch 2405 Randall Lab Interference and Diffraction: The Wave Nature of Light.

Wave nature of light Light is an electromagnetic wave. EM waves are those waves in which there are sinusoidal variation of electric and magnetic fields.

Bouncing, Bending, and Squeezing Waves Wave Phenomenon.

Surface Waves. Surface Wave A wave that has characteristics of both transverse and longitudinal waves (Ocean Waves). Surface Wave Applet.

Huygen’s Principle, Diffraction and Interference.

General Wave Behavior Physics of Music, Spring 2014.

Wave Properties. Reflection When a wave is turned back toward its start point Fixed End – wave hits an obstacle that is rigid and is reflected back inverted.

Wave a disturbance that propagates through a material medium or space. Waves transfer energy without the bulk transport of matter. In order for a mechanical.

Waves What do you know?. Types of waves Mechanical – need a medium or material to travel through ex. Water, slinky Mechanical – need a medium or material.

Waves What do you know?. Types of waves Mechanical – need a medium or material to travel through ex. Water, slinky Mechanical – need a medium or material.

Wave a disturbance that propagates through a material medium or space. Waves transfer energy without the bulk transport of matter. In order for a mechanical.

Light and Sound energy. Wave Definition A wave – is something that carries energy though matter or space. Waves transfer energy Energy spreads out as.

PHYSICS – General Wave Properties. LEARNING OBJECTIVES Core Demonstrate understanding that waves transfer energy without transferring matter Describe.

Optics Reflection and Refraction Lenses. REFLECTIONREFRACTION DIFFRACTIONINTERFERENCE Fundamentals of Optics Continuum of wavesFinite no. of waves IMAGING.

4.4 Wave Behaviors Waves interact with media and each other in variety of ways. Changes in speed or obstacles in their path will change their shape and.

Waves & Energy Transfer

Waves Reflection: Recall the law of reflection and be able to draw a suitably label diagram to represent the law. Draw appropriate diagrams for the reflection.

Interference Requirements

The Young’s modulus is the stress divided by the strain.

Do Now: White Boards What class and type of wave is light?

Properties of Waves.

GENERAL PROPERTIES OF WAVES.

Wave a disturbance that propagates through a material medium or space.

Chap-2: Waves and Sound Wave is a traveling disturbance.

Lecture 33 Longitudinal and transverse wave, diffraction

Interference and Diffraction

Vibrations and Waves Physics I.

Wave a disturbance that propagates through a material medium or space.

Wave a disturbance that propagates through a material medium or space.

Wave a disturbance that propagates through a material medium or space.

Waves 23.3 – Wave Motion pp

Knowledge Organiser – Waves

a disturbance that travels through a material medium.

How is light reflected from a mirror?

(Get Ready, Get Ready, Get, Ready!)

Waves Chapter 11.

Chapter Twenty-Three: Waves

Wave notes 11.5 and 11.6.

Waves 23.3 – Wave Motion pp

Lets review what we have learned…..

Presentation transcript:

Properties of traveling waves: Acoustics applications Physics of Music, Spring 2018

Wave Mechanics: Acoustic Applications traveling wave transverse wave longitudinal wave plane waves circular waves velocity frequency wavelength Law of Reflection parallel walls curved surfaces Diffraction

Law of reflection qi = qr Angles measured with respect to the normal (dashed line perpendicular to the surface) Image sources: http://www.dl.ket.org/physics/companion/thepc/compan/Light/Light-t.htm http://www.worsleyschool.net/science/files/reflectionlaw/page.html

Plane Wave Reflection and Ray Diagrams normal Ray diagram Image source: http://hyperphysics.phy-astr.gsu.edu/hbase/sound/reflec2.html#c1

Hocus Focus! Reflection from concave surface Image source: http://hyperphysics.phy-astr.gsu.edu/hbase/sound/reflec2.html#c1 (left); Berg and Stork, Physics of Sound, 3rd ed. (right)

Applications of Reflection Image source: D. Hall, Musical Acoustics (left)

More reflection applications Disney Concert Hall, Los Angeles

Parallel walls: resonance frequencies 1-D resonance frequencies Vienna Musikverein “shoebox” 3-D resonance frequencies

Diffraction Narrow aperture Wide aperture Tendency for waves to spread out as a result of passing by an edge (barrier or passing through a slit) Wide aperture Image source: http://innovativescience.blogspot.com/2011/02/diffraction.html

Diffraction Patterns Diffraction in ripple tank Diffraction on a MUCH larger scale (Channel Islands, CA) Image sources: (top) http://scripts.mit.edu/~tsg/www/demo.php?letnum=Q%201&show=1 Bottom: http://www.suntrek.org/factary/d.shtml

Diffraction in Action

Huygen’s Principle Wavefront = many wavelets spherically spreading out Plane  circular (diffraction!) Wavefront = many wavelets spherically spreading out Image sources: (left and middle) Berg and Stork, Physics of Sound, 3rd ed. (right) UC Irvine Optics research group.