Sound Reproduction
G3-31: Spring and Horns
Category: G3 Mechanical Waves - One Dimensional
Purpose:
To audibly illustrate transmission of energy in a mechanical wave
K5-02: PIEZOELECTRIC CRYSTAL - AUDIBLE
Category: K5 Electrical Properties of Matter
Purpose:
Demonstrate that a piezoelectric crystal converts electrical impulses into physical vibrations.
J7-24: BARKHAUSEN EFFECT
Category: J7 Magnetic Materials
Purpose:
Demonstrate flipping of magnetic domains in iron.
H4-92: AUDIO RECORDING - DIGITAL DOMAIN DEMONSTRATION CD
Category: H4 Music
Purpose:
Examples of early digital sound reproduction.
H4-81: AUDIO CART - COMPLETE AUDIO SYSTEM
Category: H4 Music
Purpose:
Show the various components of a reasonably modern audio system.
H4-68: MP3 COMPRESSION
Category: H4 Music
Purpose:
Play and compare various MP3 compressions of a short musical CD excerpt.
H4-67: CD WITH HOLE
Category: H4 Music
Purpose:
See if a compact disc will play even if it has a small hole drilled through it.
H4-66: CROSSOVER NETWORK - LARGE ADVENT
Category: H4 Music
Purpose:
Show circuit and components of a passive crossover network and how the crossover network functions.
H4-65: CROSSOVER NETWORK FOR SPEAKERS
Category: H4 Music
Purpose:
Demonstrate the operation af a crossover network.
H4-64: DISTORTION IN AUDIO AMPLIFIER
Category: H4 Music
Purpose:
Demonstrate distortion due to over-driving an audio ampiflier.
H4-58: MODULATION - AM RADIO
Category: H4 Music
Purpose:
Show amplitude modulation in in AM radio signals.
H4-56: SYNTHESIZER INTRODUCTION - VOLTAGE CONTROL OF FREQUENCY
Category: H4 Music
Purpose:
Illustrate a voltage-controlled frequency device.
H4-52: SPECTRUM ANALYSIS OF MODULATION
Category: H4 Music
Purpose:
Compare and analyze the frequency spectra of various modulated sounds such as tremolo, vibrato, and beats.
H4-51: MODULATION - AM AND FM
Category: H4 Music
Purpose:
Demonstrate AM and FM signal modulation as an introduction to vibrato and tremolo.
H1-32: WAVETEK AND AUDIO CART - EQUAL SOUND LEVEL STEPS
Category: H1 Nature of Sound
Purpose:
Illustrate the effect on the ear of successive changes of exactly 10 dB.
H1-12: VISIBLE WAVEFORMS ON LARGE SPEAKER
Category: H1 Nature of Sound
Purpose:
Show the loudspeaker motion produced by waves of various shapes.
H1-11: MICROPHONE AND OSCILLOSCOPE
Category: H1 Nature of Sound
Purpose:
Show the wave shape of various sounds.
H3-05: KUNDT'S TUBE - OSCILLATOR DRIVEN
Category: H3 Standing Sound Waves
Purpose:
Demonstrate standing waves in an air column.
H2-33: SPEAKER AND EXPONENTIAL HORN
Category: H2 Wave Properties of Sound
Purpose:
Demonstrate the effect of an exponential horn enclosure.
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H2-01: FOCUSING OF SOUND WITH CONCAVE REFLECTORS
Demonstrate how sound waves can be focused by concave reflectors. Read More
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H2-02: PARABOLIC MICROPHONE
Show what a parabolic microphone is and to demonstrate its sensitivity individually. Read More
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H2-03: ACOUSTIC RADAR
Illustrate how RADAR and SONAR work Read More
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H2-11: SOUND LENS
Demonstrate focusing of sound by refraction in a sound lens Read More
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H2-21 AUDIBLE YOUNG'S EXPERIMENT - GROUP LISTENING
Demonstrates interference of sound waves with two coherent sources
Read More
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H2-22: INTERFERENCE - TRANSPARENCIES
An optical analog to the interference pattern from two identical sound sources. Read More
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H2-24: AUDIBLE YOUNG'S EXPERIMENT - MIC AND SCOPE
Demonstrate interference of sound with two coherent sound sources in a quantitative way. Read More
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H2-25: QUINCKE'S INTERFERENCE TUBES
Demonstrate interference of sound waves in a perhaps surprising way. Read More
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H2-26: PHASE REVERSAL BETWEEN STEREO SPEAKERS - MUSIC
Demonstrate interference of sound in a dramatic way. Read More
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H2-27: PHASE REVERSAL BETWEEN STEREO SPEAKERS - OSCILLATOR
Dramatically demonstrate interference between two identical sources. Read More
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H2-28: FOURIER SYNTHESIZER - ADDITION OF WAVES
Demonstrate addition of two sine waves with variable phase difference. Read More
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H2-31: ACOUSTIC COLLIMATOR
Demonstrate the effect of frequency on diffraction of sound. Read More
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H2-32: SPEAKER WITH BAFFLE
Demonstrates diffraction and interference of sound waves
Read More
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H2-33: SPEAKER AND EXPONENTIAL HORN
Demonstrate the effect of an exponential horn enclosure. Read More
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H2-41 DOPPLER BALL
Demonstrates Doppler effect
Read More
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H2-42 DOPPLER EFFECT - TUNING FORK ON STRING
Demonstrates Doppler effect
Read More
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H2-51 BEATS - AUDIO OSCILLATORS, SPEAKER & OSCILLOSCOPE
Hear audio beats and see their wave forms on an oscilloscope
Read More
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H2-52: BEATS AND RESONANCE - TUNING BARS
Demonstrate beats, and to demonstrate resonance between two identical tuning bar resonators. Read More
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H2-53 BEATS - AUDIO OSCILLATORS AND SPEAKERS
Hear beats
Read More
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H2-54: BEATS - MOIRE PATTERN MODEL
Model for beats between mistuned audio oscillators. Read More
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H2-55: BEATS AND RESONANCE - TUNING BOXES
Illustrate beats and resonance. Read More
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