Sound Waves And you.

Slides:

Advertisements

Similar presentations

Topic 11 – Wave Phenomena.

Advertisements

A disturbance in a medium that transfers energy and momentum

Applications of Resonance Harmonics and Beats. Beats Not that kind Not that kind This is due to the interference of two waves of similar frequencies.

Chapter 12 Parts of waves (review) Octaves Stringed Harmonics

Principles of Physics. Sound Result of vibration of air particles around a source Longitudinal wave – air particles get compressed and spread apart as.

SPH3U Exam Review Waves and Sound.

Do Now (2/3/14): *Pass in your homework 1. What is a wave? 2. What are some characteristics of waves? 3. What are some different types of waves? 4. What.

Mr. DelGiudice Honors Physics. Do Now Complete in next 5 min Define what wavelength and amplitude of a wave are and draw a picture of them. How do we.

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

a range of compression wave frequencies to which the

Reflection A wave is reflected when it comes into contact with a barrier A wave is reflected when it comes into contact with a barrier Law of Reflection.

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.

THE PHYSICS OF MUSIC ♫. MUSIC Musical Tone- Pleasing sounds that have periodic wave patterns. Quality of sound- distinguishes identical notes from different.

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

13.3. Harmonics A vibrating string will produce standing waves whose frequencies depend upon the length of the string. Harmonics Video 2:34.

An organ pipe open at both ends is 1. 5 m long

Waves and Sound Level 1 Physics.

Chapter 15 Sounds.

Sound, Wavefronts Wavefronts join points in phase Linear wavefronts.

Key Terms WavelengthCompressions WavelengthCompressions FrequencyRarefactions FrequencyRarefactions PitchNodes PitchNodes HarmonicAntinodes HarmonicAntinodes.

Resonance in a Closed Tube Constant Frequency, Changing Length.

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.

Ch17. The Principle of Linear Superposition and Interference Phenomena

Chapter Review Game. Amplitude: tells us how much energy a wave has.

Chapter 15 Sound What is Sound? a pressure disturbance

Closed Pipe Pipe closed at ONE end: closed end pressure antinode air press. L = /4 L.

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

example: pluck string at 1/4 point from end.

Chapters Vibrations and Waves; Sound Simple Harmonic Motion Vibrate/Oscillate = goes back and forth Periodic = same amount of time Equilibrium.

Simple Harmonic Motion Repeated motion with a restoring force that is proportional to the displacement. A pendulum swings back and forth. pendulum A spring.

Resonance And you. Resonance Small periodic oscillations produce large amplitude oscillations Swing example – add E at just the right time = larger amplitude.

Music Music is a “ pleasant ” sound (longitudinal) wave. The pitch is the frequency of the wave. The loudness is the amplitude of the wave. Music is made.

Monday Back to waves IB Physics. Hand back and go over test Chance to earn points back on Wed. block lunch- here – multiple choice – poss. 10 points!!!!!!!!!!!!!

Waves 1 The Transfer of Energy. The Basics: A λ d(m) (#λ or m) d = displacement Amplitude = max displacement from origin λ = wavelength (in m) f = frequency.

Waves & Sound Review Level Physics.

Standing Waves.

Waves 1 The Transfer of Energy.

Waves and Sound AP Physics B.

AP Physics Review Waves and Sound.

Standing Wave & Resonance

Sound and music Contents: Sound 101 Beats Overtones and music.

Determine the l, f, & T of the 49th overtone of a 4

Examples of wave superposition

Waves and Sound.

Waves 1 The Transfer of Energy.

Wave Behavior in Sound Waves and Resonance!

Standing waves.

Standing Waves Resonance.

Waves and Sound AP Physics B.

Waves and Sound Honors Physics.

THE PHYSICS OF MUSIC ♫.

Waves and Sound AP Physics B.

Sound Waves And you.

Principle of Linear Superposition and Interference Phenomena

Waves and Sound AP Physics 1.

Waves and Sound.

Open-End Air Columns Standing Waves.

Waves and Sound AP Physics B.

Waves and Sound AP Physics 1.

Chapter 12 Notes.

Sound Waves And you.

Waves and Sound AP Physics 1.

Chapter 13 – Waves II.

Presentation transcript:

Sound Waves And you

Sound waves Longitudinal waves = particle motion in same direction as energy motion Hearing ~ 20 to 20,000 Hz (sound generator) http://plasticity.szynalski.com/tone-generator.htm Loudness = amplitude Pitch = frequency Rubens tube: tone generator and “the lion sleeps tonight”

Closed tube waves 1st mode = ¼ λ node at closed end anti node at open end antinode 1st harmonic (overtone) L = ¼ λ 2nd harmonic L = ¾ λ 3rd harmonic L = 5/4 λ

Odd series of #s math relationship L = (2n – 1) /4 λ λ = v/f So the L = (2n – 1) / 4 v/f

Investigation C here

Sound videos https://www.youtube.com/watch?v=Ude8pPjawKI https://www.youtube.com/watch?v=MwsGULCvMBk https://www.youtube.com/watch?v=cK2-6cgqgYA

Acoustics https://www.youtube.com/watch?v=JPYt10zrclQ https://www.youtube.com/watch?v=mXVGIb3bzHI

Follow up questions A) A Rubens tube filled with propane gas has a measured λ of 1.81m when a tone of 246 Hz is used. What is the speed of the sound wave in the propane? B) The first fundamental frequency is produced in a tube with a measured length of 0.32m and a diameter of 11cm using a 247 Hz tone. According to the method you used in your investigation, what is velocity of the wave in the tube? (do not forget the correction factor!!!)

The answers A) 445 m/s B) 359.6 m/s

More fun questions A) If the temperature of a room filled with air is 32OC (at one atmosphere of pressure), what is the “true” velocity of a sound wave in the room? (recall your investigation) The answer: 350.2 m/s

Diffraction Apparent bending of waves around obstacles and spreading out of waves past an opening.

Wave interference * Sound wave interference demonstration with tone generator and students moving around in the room.

Doppler effect ppt. here