Resonance Chapter 4. Concert Talk Resonance: definition When a vibrating system is driven by a force at a frequency near the natural frequency of the.

Slides:

Advertisements

Similar presentations

Resonance in a Closed Tube

Advertisements

Chapter 11 Waves. Waves l A wave is a disturbance/oscillation generated from its source and travels over long distances. l A wave transports energy but.

Phys 250 Ch15 p1 Chapter 15: Waves and Sound Example: pulse on a string speed of pulse = wave speed = v depends upon tension T and inertia (mass per length.

Wave Properties Chapter 14.

Summary Sinusoidal wave on a string Wavefunction.

John Cockburn Room E15) PHY 102: Waves & Quanta Topic 4 Standing Waves John Cockburn Room E15)

11: Wave Phenomena 11.1 Standing (Stationary) Waves.

Principle of Superposition Interference Stationary Waves

PH 105 Dr. Cecilia Vogel Lecture 6. OUTLINE  Natural or Normal Modes  Driving force  Resonance  Helmholtz resonator  Standing Waves  Strings and.

Dr. Jie ZouPHY Chapter 18 Superposition and Standing Waves (Cont.)

7/5/20141FCI. Prof. Nabila M. Hassan Faculty of Computer and Information Fayoum University 2013/2014 7/5/20142FCI.

PH 105 Dr. Cecilia Vogel Lecture 7. OUTLINE  Standing Waves in Tubes  open vs closed  end correction  Modes  fundamental  harmonics  partials 

 Fundamentals of Sound. What is sound?  Sound is the result of vibrating air molecules. Molecules can be in 2 states of motion. What are they? 1. Compression.

Waves and Sound AP Physics 1. What is a wave A WAVE is a vibration or disturbance in space. A MEDIUM is the substance that all SOUND WAVES travel through.

Waves and Sound Ch

Waves A wave is a rhythmic disturbance that carries energy through matter or space.

Standing Waves Resonance. Standing waves in Strings An incident wave undergoes fixed end reflection Standing waves produce nodes where the amplitude is.

Chapter 15 Mechanical Waves Modifications by Mike Brotherton.

Chapter 11 Elasticity And Periodic Motion. Goals for Chapter 11 To follow periodic motion to a study of simple harmonic motion. To solve equations of.

Chapter 11 Waves. MFMcGrawCh-11b-Waves - Revised Chapter 11 Topics Energy Transport by Waves Longitudinal and Transverse Waves Transverse Waves.

Waves Waves. Types of Waves l Longitudinal: The medium oscillates in the same direction as the wave is moving è Sound l Transverse: The medium oscillates.

A taut wire or string that vibrates as a single unit produces its lowest frequency, called its fundamental.

Stringed Instruments (Ex. Guitars, pianos, violins)  Vibrating the string sets up a standing wave, the vibration from the string resonate the sounding.

1© Manhattan Press (H.K.) Ltd Quality of sound.

Chapter 11 Vibrations and Waves Phy 2053 Conceptual Questions.

Chapter 11:Vibrartions and Waves

Lab 11: Standing Waves Only 1 more to go!! Wave: something that results from a disturbance and then travels away from that disturbance Example: Tossing.

Copyright © 2009 Pearson Education, Inc. Lecture 1 – Waves & Sound b) Wave Motion & Properties.

 How do you find the amplitude of a pendulum?  In simple harmonic motion, where is the velocity highest/lowest? Acceleration? Force?  What is the period?

The Physics of Musical Instruments

Example: pulse on a string speed of pulse = wave speed = v

Vibrations and Waves Chapter 12. Simple Harmonic Motion A motion that occurs repeatedly, vibrating back and forth over its equilibrium point. The force.

Chapter 25 Vibration and Waves. Simple Harmonic Motion  When a vibration or an oscillation repeats itself back and forth over the same path, the motion.

Vibrations and Waves Waves Periodic Motion Periodic motion – a motion that repeats in a regular cycle. Simple harmonic motion – results when.

Physics. Wave and Sound - 4 Session Session Objectives.

Wave Interference Superposition Principle – when two or more waves encounter each other while traveling through a medium, the resultant wave is found by.

Chapter 11 Vibrations and Waves.

Waves and Sound Honors Physics.

WAVES Vibrations that carry energy from one place to another.

For a standing wave to be set up in a string there has to be two waves travelling in it. Explain what has to be the same and what has to be different about.

5. Interference Interference – combination of waves (an interaction of two or more waves arriving at the same place) Principle of superposition: (a) If.

Chapter 15: Wave Motion 15-2 Types of Waves: Transverse and Longitudinal 15-3 Energy Transported by Waves 15-4 Mathematical Representation of a Traveling.

FCI. Faculty of Computer and Information Fayoum University FCI.

Stationary Waves Presentation by Ms. S. S. Patil.

Chapter 14 Vibrations and Waves. Hooke’s Law F s = - k x F s is the spring force k is the spring constant It is a measure of the stiffness of the spring.

CONTENTS Formation, structure and terminology In pipes Wavelength and L (length), velocity o Experiments are not described in this power point. o Observing.

Waves & Sound Review Level Physics.

Chapter 15 Mechanical Waves © 2016 Pearson Education, Inc.

Lecture 11 WAVE.

A taut wire or string that vibrates as a single unit produces its lowest frequency, called its fundamental.

Chapter 15 Mechanical Waves.

Unit 10: Part 1 Waves.

Principle of Superposition Interference Stationary Waves

MECHANICAL WAVES AND SOUND

Standing (or Stationary) Waves

AP Physics B, Waves Vibrations and Waves

Standing waves.

Standing Waves Resonance.

Resonance Waves and Sound

Mechanical Waves A mechanical wave is a physical disturbance in an elastic medium. Consider a stone dropped into a lake. Energy is transferred from stone.

Wave Interactions.

CHAPTER-16 T071,T062, T061.

5. Interference Interference – combination of waves

1 If a guitar string has a fundamental frequency of 500 Hz, which one of the following frequencies can set the string into resonant vibration? (A) 250.

Chapter 13 – Waves II.

Summary Sinusoidal wave on a string. Summary Sinusoidal wave on a string.

Presentation transcript:

Resonance Chapter 4

Concert Talk

Resonance: definition When a vibrating system is driven by a force at a frequency near the natural frequency of the system, a relatively large amplitude results.

Resonance of Mass-Spring Vibrator Natural frequency of the system (determined by frequency equation) Drive the system with a crank at any frequency When frequency of crank and natural frequency match, amplitude will build to maximum.

Linewidth and Q Amplitude builds to max and decreases symmetrically around ƒ 0. Linewidth (∆f ) is measured at an amplitude of (71%) of A max is 1 divided by the square root of 2. Q = f 0 /∆f

Phase Position in the cycle of a vibration Phase Difference: A comparison between the positions of two vibrating objects at the same time, or The relative position in a vibration cycle, of a vibrating object and a driving force.

Standing Waves on a String Constructive and destructive interference leads to standing waves Fig. 4.5 compares modes of vibration with wavelength on a string (fixed at both ends) Frequency of nth mode will be n times the frequency of the first mode.

Wave Speed in Wire or Spring Transverse Wave:

Partials, Harmonics, Overtones Partials include all modes of vibration, including the fundamental. Overtones are all partials above the fundamental. Harmonics refer to modes of vibration that are integer-related (or nearly integer-related), including the fundamental.

Open and Closed Pipes Open end of a pipe behaves like the fixed end of a string. pulse reflects with opposite displacement Open pipe acts like a string fixed on both ends, wavelength = 2L. Closed end of pipe reflects pulses with same displacement. Wavelength = 4L. Only odd-numbered harmonics are present.

Pipe Recipes Open Pipe: Closed Pipe:

End Correction for Pipes Pressure drops to zero a small distance beyond open end of pipe End Correction = 0.61r Add to both ends of open pipe to find its acoustic length. Add to one end of closed pipe to find its acoustic length.

Acoustic Impedance Defined as the ratio of sound pressure to volume velocity, measured in acoustic ohms. Most important to note that it varies inversely to surface area, so that changes in diameter, or the addition of a cross-branch to a tube, will cause reflections in sound waves.