HELMHOLTZ RESONATORS. Bottle Band More examples: Whistling Jar Pre-Columbian Whistling JarBasic Principle of Operation Image from:

Slides:

Advertisements

Similar presentations

ConcepTest 12.1a Sound Bite I

Advertisements

Sound: Chapter 14 WOD are underlined.. What happens when you strike an object?

Resonance in a Closed Tube

Beats and Resonance Sections 9.3 and 9.4.

Music. Doppler The Doppler Effect –The pitch of a sound will be higher or lower if the source is moving toward or away from you –Sirens –Race Cars –Doppler.

Eric Hutchinson.  A cajón is a box-shaped instrument that is played by slapping the front face (tappa) by the hands or sometimes with brushes, sticks,

1 Non-Linearities Linear systems (e.g., filters) can change the intensity and phase of a signal input. Non-linear systems (e.g., amplfiers) not only can.

Universal Wave Equation

Physics 145 Introduction to Experimental Physics I Instructor: Karine Chesnel Office: N319 ESC Tel: Office hours: on appointment.

ConcepTest 11.16Out to Sea ConcepTest Out to Sea t t +  t 1) 1 second 2) 2 seconds 3) 4 seconds 4) 8 seconds 5) 16 seconds A boat is moored in a.

Physics of Guitars By: The Chads. Brief History of Guitars Modern guitars can be traced back to Spain; derived from the Spanish word “Guitarra.” Romans.

Sound demostrations Sound wave are caused by vibrations and carry energy through a medium.

UNIT 7 Waves, Vibrations, and Sound 1. Thursday February 2 nd 2 WAVES, VIBRATIONS, AND SOUND.

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

EE2F1 Speech & Audio Technology Sept. 26, 2002 SLIDE 1 THE UNIVERSITY OF BIRMINGHAM ELECTRONIC, ELECTRICAL & COMPUTER ENGINEERING Digital Systems & Vision.

Chapter 13 Sound. Sound is a compressional wave created by a disturbance or vibration that compresses molecules.

 Measuring Acoustic Wavelength and Velocity Diva, Tama & Hafiz.

Maximization of Flow through Intake & Exhaust Systems

ConcepTest 12.1a ConcepTest 12.1a Sound Bite I 1) the frequency f 2) the wavelength 3) the speed of the wave 4) both f and 5) both v wave and When a sound.

1 Sound Propagation in Different Environments What is Sound? Free Field Sound Field Rooms Sound in Motion.

Acoustics Waveform Frequency Intensity Resonance Sound Propagation.

Design Steps for Intake & Exhaust Systems

The Mathematics of a Cajón Drum T1A Eric Hutchinson.

Hr Physics Chapter 11 Notes

Separate branches of Mechanics and Biomechanics I. Periodic Motion. Mechanical waves. Acoustics.

Chapter 14 Outline Periodic Motion Oscillations Amplitude, period, frequency Simple harmonic motion Displacement, velocity, and acceleration Energy in.

13.1 Sound Waves pp Essential Questions  How do we perceive sound?  What conditions change the way in which we perceive sound?

Chapter 22A – Sound Waves A PowerPoint Presentation by

Physics 1251 The Science and Technology of Musical Sound Unit 1 Session 6 Helmholtz Resonators and Vibration Modes and Vibration Modes Unit 1 Session 6.

Simple Harmonic Motion S.H.M.. Simple harmonic motion is very common in nature. A mass suspended on a spring, the end of a vibrating tuning fork, a cork.

Sound Sound waves are –Longitudinal –Pressure Waves Infrasonic – less than 20 Hz Audible – between 20 and 20,000 Hz Ultrasonic – greater than 20,000 Hz.

Can you hear it? Samuel DuPont 2009  Light  Heat  Sound  Electrical  Motion Samuel DuPont 2009.

Physics 145 Introduction to Experimental Physics I Instructor: Karine Chesnel Office: N319 ESC Tel: Office hours: on appointment.

Bell Work: Pendulum Intro 1. List as many waves as you can. (aim for 10+) 2. List as many examples of pendulums as you can.

Simple Harmonic Motion

Constructive Interference – Result is a larger amplitude When Two Waves Meet…  Destructive Interference – Result is a smaller amplitude  Waves pass through.

Longitudinal Standing Waves antinodes (max. vibration) nodes (no vibration)

Review. Vibrations and Waves Restoring Force Important: the restoring force F is not constant, but varies with position!

Physics 1251 The Science and Technology of Musical Sound Unit 1 Session 5 Simple Harmonic Oscillators Unit 1 Session 5 Simple Harmonic Oscillators.

Standing Waves and Resonance Standing Wave: “Standing waves” are formed from two or more traveling waves that collide and are “in tune” with one another.

© 2007 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.

Chapter 19 Physics A First Course Vibrations, Waves, and Sound.

Helmholtz Resonator – Music from a bottle

Guitars The Parts of a Guitar. The Top The very top of the guitar is 6 tuners that tune the 6 strings. Below that is the neck with about 22 frets on a.

MEASUREMENT OF SPEED OF SOUND IN AIR.

& Simple Harmonic Motion Any periodically repeating event. (Ex: waves, pendulums, heartbeats, etc.)

Objectives Demonstrate knowledge of the nature of sound waves and the properties sound shares with other waves. Solve problems relating frequency, wavelength,

9 th Grade Science Chapter 12c.  Definition: ◦ Sounds used in regular pattern that is pleasing to hear  Every musical instrument has: ◦ Natural frequency:

The Nature of Sound. Sound is Longitudinal  Longitudinal wave or compression wave  Compression vs. rarefaction  Longitudinal wave or compression wave.

Oscilloscope Lab Seeing and Hearing waves. Sound Waves Sound can travel at different velocities through the same medium (air for example). Different temperatures.

Sound waves are longitudinal waves Loudness is connected to the amplitude – Larger amplitude means louder sound Pitch is connected to frequency and wavelength.

Longitudinal Standing Waves and Harmonic Series in Open and Closed Tubes Physics of Music, Spring 2016.

Whip Around  What 3 adjectives best describe you?  Think about this question and be prepared to share aloud with the class.

Harmonics on the guitar Resonating air column (open ended)

Chapter 3: The Speech Process

DO NOW Pick up notes Gas Pressure lab is due Thursday

Chapter 3: The Speech Process

Design of Mufflers and Silencers

Helmholtz Resonators.

MECHANICAL WAVES AND SOUND

“Light is the only thing we see. Sound is the only thing we hear.”

Constant Force (F = constant)

Interference of waves.

Research Methods in Acoustics Lecture 3: Damped and Forced Oscillators

Physics A First Course Vibrations, Waves, and Sound Chapter 19.

5. Interference Interference – combination of waves

Helmholtz Resonator AIR Pressure 1 Pressure 2

AP Physics Waves Pt 2.

1. ConcepTest 12.1a Sound Bite I

Kierunek „Elektronika”, rok II

Presentation transcript:

HELMHOLTZ RESONATORS

Bottle Band

More examples: Whistling Jar Pre-Columbian Whistling JarBasic Principle of Operation Image from: Image from:

Yet more examples: The Ocarina Ocarinas Basic Principle of Operation

Spring Mass System in Disguise Air plug in neck “bobs” in a big sea of air molecules

Resonant Frequency v sound velocity of sound waves in air L length of plug of air in neck S neck cross-section V chamber volume of air

Assumptions…you know what they say Which variable(s) is changing among these Coke bottles? How do these Coke bottles compare to the simple physics model? How would you determine S, L, and V?

Lab Experiment Tune bottles Compare actual frequency to theory Do better than these guys!

Resources Univ of New South Wales Acoustical Physics group: Eric Heller’s “Why you hear what you hear” chapter 13: Mountain Ocarinas: The Bottle Boys website: