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H4-55: YAMAHA DX7S DIGITAL SYNTHESIZER

Category: H4 Music

Purpose: Demonstrate features of a modern digital synthesizer.

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.

H5-31: DIPLACUSIS AND BINAURAL BEATS

Category: H5 The Ear

Purpose: Demonstrate individually the phenomena of binaural beats and diplacusis.

H5-19: SUM AND DIFFERENCE TONES

Category: H5 The Ear

Purpose: Quantitatively demonstrate sum and difference tones.

H5-17: WAVETEKS AND AUDIO CART - QUALITY BEATS

Category: H5 The Ear

Purpose: Demonstrate second order or quality beats.

H5-15: EFFECT OF HARMONIC CONTENT ON TONE QUALITY

Category: H5 The Ear

Purpose: Illustrate Ohm's Law of Hearing, and to hear the sounds of complex waves produced by the Fourier Synthesizer.

H5-13: WAVETEKS AND AUDIOCART - MASKING

Category: H5 The Ear

Purpose: Demonstrate masking.

H5-12: WAVETEKS AND AUDIO CART - CRITICAL BAND

Category: H5 The Ear

Purpose: Demonstrate the effect of the critical band on the sound of two simultaneous sine waves.

H5-11: WAVETEK AND AUDIOCART - FREQUENCY RANGE OF HEARING

Category: H5 The Ear

Purpose: Demonstrate the approximate frequency range of human hearing.

L6-42: DISTORTION AND CORRECTION

Category: L6 Lenses

Purpose: Illustrate pincushion and barrel distortion and correction thereof.

L6-35: CHROMATIC ABERRATION - POINT SOURCE AND 20 CM LENS

Category: L6 Lenses

Purpose: Show the effect of chromatic aberration in a lens.

L6-14: IMAGE OF CONVEX LENS - WITH AND WITHOUT BAFFLE

Category: L6 Lenses

Purpose: Encourage thought regarding how an image is formed.

L6-08: REAL IMAGE OF CONVERGING LENS - LIGHT BULB

Category: L6 Lenses

Purpose: Show the real image of a converging lens.

L6-07: MICROWAVES - LENS

Category: L6 Lenses

Purpose: Demonstrate that a paraffin lens can focus microwaves.

H1-44: ULTRASONIC MOTION DETECTOR WAVE FORM

Category: H1 Nature of Sound

Purpose: Show the wave form of the ultrasonic signal created by the ultrasonic motion detector.

H1-31: SOUND LEVEL METER

Category: H1 Nature of Sound

Purpose: Demonstrate use of a sound level meter.

H1-27: SPEED OF SOUND - LISSAJOUS FIGURES

Category: H1 Nature of Sound

Purpose: Measurement of the speed of sound in air using Lissajous figures.

H1-26: SPEED OF SOUND IN GARDEN HOSE

Category: H1 Nature of Sound

Purpose: Direct measurement of the speed of sound in air.

H1-25: SPEED OF SOUND BETWEEN TWO MICROPHONES

Category: H1 Nature of Sound

Purpose: Measure the speed of sound by determining the travel time of a pulse between two microphones.
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