Acoustics

Support Equipment

• 3-00.00 - Support Equipment used for Acoustics

Oscillations

Pendula

• 3A10.10 - Simple Pendulum
• 3A10.20 - Inverted Pendulum
• 3A10.21 - Metronome
• 3A10.30 - Torsion Pendulum
• 3A10.40 - Variable "g" Pendulum

Physical Pendula

• 3A15.20 - Physical Pendulum
• 3A15.40 - Pendula - Arc vs. Ring
• 3A15.70 - Kater's Pendula

Springs and Oscillators

• 3A20.10 - Simple Harmonic Motion - Mass on Spring
• 3A20.15 - Mass on a Spring - 1 to 4 Masses
• 3A20.30 - Simple Harmonic Motion - Air Track & Hoop Springs
• 3A20.35 - Simple Harmonic Motion - Air Track & 2 Springs
• 3A20.60 - Simple Harmonic Motion - Ball and Dish

Simple Harmonic Motion

• 3A40.10 - SHM and Rotational Motion - Spring and Mass
• 3A40.21 - SHM and Rotational Motion - Pendulum
• 3A40.35 - SHM and Rotational Motion - Video

Damped Oscillators

• 3A50.10 - Simple Harmonic Motion - Damped Mass on Spring

Driven Mechanical Resonance

• 3A60.10 - Tacoma Narrows Bridge
• 3A60.30 - Barton's Pendula
• 3A60.40 - Driven Resonance- Pasco Oscillator and Rotating Mass on a Spring
• 3A60.50 - Resonance Gyro - Frahm, Resonance Reeds, and Loops

Coupled Oscillations

• 3A70.10 - Wilberforce Pendulum
• 3A70.20 - Coupled Pendulum

Normal Modes

• 3A75.10 - Coupled Oscillations - Air Track
• 3A75.40 - Bifilar Pendulum

Lissajous Figures

• 3A80.10 - Sand Pendulum
• 3A80.20 - Lissajous Figures - Oscilloscope
• 3A80.40 / 9C40.60 - Lissajous Figures - Laser and 3 Mirrors
• 3A80.43 - Lissajous Figures - Harmonograph

Non-Linear Systems

• 3A95.22 - Compound Pendulum
• 3A95.50 - Chaos Pendula - ref. Chaos
• 3A95.51 - Chaos Motor - ref. Chaos
• 3A95.55 - Change of a Diode - ref. Chaos
• 3A95.55 - Change of a Diode
• 3A95.56 - Revolution - ref. Chaos
• 3A95.57 - Space Circles - ref. Chaos
• 3A95.58 - Stable vs. Chaotic Equilibrium Machine - ref. Chaos
• 3A95.59 - Belousov - Zhabotinsky Reactions - ref. Chaos
• 3A95.67? - Lava Lamp - ref. Chaos
• 3A95.70 - Variable Length Pendulum

Wave Motion

Transverse Pulses and Wave

• 3B10.10 - Wave Demo - Spring on Wall and Rope
• 3B10.20 - Wave Demo - Slinky
• 3B10.25 - Standing Pulses in a Spring
• 3B10.75 - Pendulum Waves
• 3B10.85 - Non - Recurrent Wave Fronts

Longitudinal Pulses and Waves

• 3B20.10 - Hanging Slinky
• 3B20.20 - Waves - Air Track
• 3B20.30 - Waves - Longitudinal Waves - PASCO model
• 3B20.70 - Crova's Disc

Standing Waves

• 3B22.10 - Standing Waves in a String - Hanging Motor 
• 3B22.11 - Standing Waves in a String - Melde's Experiment
• 3B22.12 - Standing Waves in a String - Electrically Driven Tuning Fork
• 3B22.14 - Standing Waves in a Wire
• 3B22.30 - Wave Demo - Wave Machines
• 3B22.70 - Standing Waves - Soap Film Oscillations
• 3B22.90 - Wave Demo - Overhead Wave Model
• 3B25.40 - Soundboard

Impedance and Dispersion

Compound Waves

Wave Properties of Sound

• 3B30.10 - Speed of Sound in Air
• 3B30.30 - Bell in a Vacuum
• 3B30.50 - Sound in Helium and CO₂
• 3B30.61 - Speed of Sound in a Rod
• 3B30.63?  - Speed of Sound in Water

Phase and Group Velocity

• 3B33.20 - Group & Phase Velocity

Reflection and Refraction (Sound)

• 3B35.10 - Gas Lens
• 3B35.30 - Parabolic Reflector & Sound Source
• 3B35.39 - Curved Reflectors - Whispering Gallery

Transfer of Energy in Waves

• 3B39.20 - Frequency of Sound Waves - Dominoes

Doppler Effect

• 3B40.05 - Doppler Effect - Overhead Projector Plates
• 3B40.10 - Doppler Effect - Buzzer and String
• 3B40.25 - Doppler Effect  - Rotator App.
• 3B40.30 - Doppler Effect - Microwave Beats

Shock Waves

• 3B45.13 - Shock Wave Fronts - ref. Astronomy
• 3B45.30 - Soliton
• 3B45.35 - Shock Wave Fronts
• 3B45.60 - Shock Wave Fronts - Supersonic Jet
• 3B45.61 - Bull Whip and Towel

Interference and Diffraction

• 3B50.20 - Ripple Tank
• 3B50.40 - Moire Transparencies

Interference and Diffraction of Sound

• 3B55.10 - Interference of Sound Waves - Rotating Platform, LED
• 3B55.30 - Speaker and Baffle
• 3B55.32? - Interference of Speakers
• 3B55.40 - Interference - Quincke's Tube or Trombone

Beats

• 3B60.10 - Beats - Tuning Fork
• 3B60.15 - Beats - Organ Pipes
• 3B60.20 - Beats - Oscilloscope

Coupled Resonators

• 3B70.10 - Resonance in Solids Demos - Tuning Fork Resonance

Acoustics

The Ear

• 3C10.10 - Model of the Human Ear - ref. Physics of the Human Body
• 3C10.20 - Binaural Hearing
• 3C10.21 - Stethoscope

Pitch

• 3C20.10 - Range of Hearing for the Human Ear - ref. Chem. & Physics of E. E.
• 3C20.16 - Ultrasonic Waves - Suspended Waves
• 3C20.20 - Zip Strips
• 3C20.22? - Grooves on a Record  - Model
• 3C20.23? - Grooves on a Record - LP
• 3C20.30 - Siren Disk - Seebeck Siren
• 3C20.35? - Sirens
• 3C20.40 - Savart's Wheel - Musical Saws
• 3C20.60? - Increasing Pitch - Euler's Disk, Magnets & Glass Bottles

Intensity and Attenuation       

Architectural Acoustics

• 3C40.10 - Concert Hall Acoustics

Wave Analysis and Synthesis

• 3C50.10 - Fourier Synthesis of Waves - Pasco
• 3C50.40 - Resonance - Electromagnetically Driven Strings
• 3C50.55 - Noise Generator and Filters
• 3C50.80 - Spectrum Analysis

Music Perception and the Voice

• 3C55.72 - Tuning Forks - Tone Quality
• 3C55.80 - Vocal Formants
• 3C55.85 - Acoustical Filters - Stewart Filters
• 3C55.90 - Science of Sounds -  Tapes and Records

Instruments

Resonance in Strings

• 3D20.10 - Sonometer
• 3D20.20 - Sonometer on Oscilloscope
• 3D20.21 - Guitar

Stringed Instruments

Resonance Cavities

• 3D30.10 - Resonance Tubes - Water Column
• 3D30.14 - Open Tube Resonance - Ambient Noise Resonators
• 3D30.15 - Standing Waves in a Tube
• 3D30.16 - Resonance Tube - Sliding Piston
• 3D30.17 - Box and Bottle Modes
• 3D30.35 - Freq Tube
• 3D30.40 - Helmholtz Resonator
• 3D30.60 - Kundt's Tube
• 3D30.70 - Rijke Tube - Hoot Tubes with Mounted Metal Screens
• 3D30.71 - Hoot Tubes - ref. Chem. & Physics of E. E.
• 3D30.75 - Knipp Tube

Air Column Instruments

• 3D32.10 - Pop Bottle Resonance Tubes
• 3D32.11 - Flute
• 3D32.14? - Clarinet - Saxophone 
• 3D32.15 - Variable Pitch Whistles
• 3D32.18? - Soda Straw Oboe
• 3D32.25 - Organ Pipes and Whistles
• 9B17.40 - Edge Tone Generator
• 3D32.35 - Resonance in Cavities - Horn
• 3D32.40 - Trumpet / Cornet
• 3D32.41 - Baritone  / Euphonium
• 3D32.45 - PVC Instruments - Palm Pipes and Boomwhackers

Resonance in Plates, Bars, Solids

• 3D40.10 - Justemp Bars - Xylophone
• 3D40.15 - Musical Sticks
• 3D40.18? - Musical Ruler - Musical Strips
• 3D40.19? - Thumb Piano
• 3D40.20 - Singing Rods
• 3D40.30 - Chladni Plates
• 3D40.40 - Drums
• 3D40.45 - Dancing Soap Bubbles
• 3D40.50 - Musical Goblets and Bowl
• 3D40.51 - Spouting Bowl
• 3D40.54? - Harmonica
• 3D40.55 - Shattering Beaker
• 3D40.56 - Low Frequency Glass Breaker
• 3D40.60 - Bull-Roarer

Percussion Instruments

• 3D42.10 - Gongs - Cymbals
• 3D42.20 - Bells

Tuning Forks

• 3D46.15 - Tuning Forks - Various
• 3D46.16 - Tuning Forks on Oscilloscope
• 3D46.30 - Tuning Fork Motion
• 3D46.90 - Electronically Driven Tuning Fork

Electronic Instruments

• 3D50.10 - Keyboards - Piano and Organ
• 3D50.15 - Synthesizer
• 3D50.20 - Theremin

Sound Reproduction

Loudspeakers

• 3E20.10 - Loudspeakers
• 3E20.15 - Loudspeaker Resonance
• 3E20.25 - Tooth Toons- Human Loudspeaker
• 3E20.30? - The Sound Color Organ
• 3E20.35 - High - Mid - Low Pass Filter / Crossover

Microphones

• 3E30.00 - Microphone Construction

Amplifiers

• 3E40.00 - Amplifier
• 3E50.00 - Phonograph - Turntable

Recorders

• 3E60.00 - Tape Deck
• 3E70.00 - CD Boombox

Digital Systems

• 3E80.10 - Digital Reproduction CD with Holes
• 3E80.50 - Digital Compression