Standing Waves in Sound Tubes Physics Mrs. Coyle.

Slides:

Advertisements

Similar presentations

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.

Advertisements

Resonance If you have ever blown across the top of a bottle or other similar object, you may have heard it emit a particular sound. The air in the bottle.

Longitudinal Standing Waves and Complex Sound Waves 17.6 and 17.7.

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

Resonance: More Practice Resonance occurs when the frequency of the forcing vibration is _________ the natural frequency of the object. A. less thanC.

Beats  Different waves usually don’t have the same frequency. The frequencies may be much different or only slightly different.  If the frequencies are.

Pressure waves in open pipe Pressure waves in pipe closed at one end.

Longitudinal Standing Waves  Consider a tube with both ends opened  If we produce a sound of frequency f 1 at one end, the air molecules at that end.

Harmonics Physics Chapter 13-3 Pages A. Standing waves on a vibrating string Fundamental frequency – lowest frequency of vibration of a standing.

Standing Waves When an incident wave interferes with a reflected wave to form areas of constructive and destructive interference. When an incident wave.

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.

Musical Instruments. Standing Waves  Waves that reflect back and forth interfere.  Some points are always at rest – standing waves.

Vibrating Strings and Resonance in Air Columns. String Instruments  In many musical instruments, the source sets a string into vibration  Standing waves.

Sound quality and instruments  Different notes correspond to different frequencies  The equally tempered scaled is set up off of 440 A  meaning the.

A “physical phenomenon that stimulates the sense of hearing.”

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

resonance occurs when a medium vibrates at the same frequency as the external vibrating force causing the vibration. If the forcing frequency equals.

Stationary Waves Stationary waves are produced by superposition of two progressive waves of equal amplitude and frequency, travelling with the same speed.

Forced Vibrations A system with a driving force will force a vibration at its frequency When the frequency of the driving force equals the natural frequency.

Waves – Chapter 10.2 – 10.5 Transverse vs longitudinal Frequency f, wavelength, period T, wave speed – v = f Harmonic waves: y(x) = Asin(kx); with k =

Standing Waves Music to my ears ? II.

Sound Waves The production of sound involves setting up a wave in air. To set up a CONTINUOUS sound you will need to set a standing wave pattern. Three.

The Physics of Musical Instruments

SOUND Chapter Twenty-Four: Sound  24.1 Properties of Sound  24.2 Sound Waves  24.3 Sound Perception and Music.

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.

SoundSection 3 What do you think? A violin, a trumpet, and a clarinet all play the same note, a concert A. However, they all sound different. What is the.

Waves and Sound Honors Physics.

Harmonics Review Music to my ears?. Standing Waves Vibrating Strings Each standing wave has a different frequency Single pitches = Multiple frequencies.

Stationary Waves Stationary waves are produced by superposition of two progressive waves.

15.1 Properties and Detection of Sound Interference of sound waves.

Traveling Waves Standing Waves Musical Instruments Musical Instruments all work by producing standing waves. There are three types of instrument.

Sound Part II  Music What is the study of sound called?  Acoustics.

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.

Wave Interference and Standing Waves. Interference Constructive interference – Peak and peak – Trough and trough += Destructive interference – Peak and.

Standing Waves.

Waves and Sound AP Physics B.

Review – Standing Waves

Standing Wave & Resonance

Resonance , Standing Waves, and the Doppler Effect.

Waves and Sound.

Mechanical Wave Interactions

Chapter 15 Sound: The Physics of Music PPTB

Standing waves standing waves on a string: RESONANCE:

String and Air Instruments

Chapter 13 Objectives Explain why resonance occurs.

Standing waves.

Standing Waves Resonance.

Standing Waves Waves and Sound

String and Air Instruments

Standing waves review A standing wave occurs when there is constructive interference between a wave and it reflections from a boundary.

Resonance Waves and Sound

Waves and Sound AP Physics B.

Waves and Sound Honors Physics.

THE PHYSICS OF MUSIC ♫.

Waves and Sound AP Physics B.

Waves and Sound AP Physics 1.

Your bell ringer is on the whiteboard.

Waves at Boundaries.

Oscillations and Waves

Waves and Sound.

Waves and Sound AP Physics B.

Waves and Sound AP Physics 1.

Music Examples Answers

Waves and Sound AP Physics 1.

Waves and Sound Physics.

Presentation transcript:

Standing Waves in Sound Tubes Physics Mrs. Coyle

Resonance When an outside force is applied with a frequency equal to or a multiple of the natural frequency of vibration of an object, the object begins to vibrate and its amplitude increases.

Resonance in Sound Tubes Examples: Musical instruments (flutes, clarinets etc) Bottles

Resonance in Sound Tubes Open-Open End Fundamental Frequency 1st harmonic : L= ½ λ =>λ=2L => f = v/(2L) 2nd harmonic f 2 = 2f 1 3rd harmonic f 3 = 3f 1

Number of harmonic matches the number of nodes. (n=1,2,3,…) Every one node corresponds to ½ λ. L= n (½λ) => λ=2L/n f=v λ=> f n = nv/(2L) f n = nf 1 What does this equation remind you of ? Resonance in Sound Tubes Open-Open End

Example 1 A pipe is open on both ends and is 1.00m long and is at T=20 o C. a) What is the wavelength of the lowest resonant frequency? b) What is the fundamental frequency? Answer: a) 2.00m, b) 172 Hz

Resonance in Sound Tubes Closed-Open Fundamental Frequency 1 st harmonic L= ¼ λ => λ=4L => f = v/(4L) 2 nd harmonic f 2 = 3f 1 3 rd harmonic f 3 = 5f 1

Number of harmonic matches the number of nodes. (n=1,2,3,…) L= (2n-1)λ /4 => λ=4L/(2n-1) f=v λ=> f n = (2n-1)v/(4L) f n = (2n-1)f 1 These equations are the same as a string with one free end and one fixed end. Resonance in Sound Tubes One End Closed-One End Open

Example 2 A pipe is open on one end and closed on the other is 2.0 meter long. a) What is the lowest resonant frequency? b) Draw the 4 th harmonic and find the 4 th resonant frequency? Answers: a) 41.4Hz, b) 290Hz