H1 Nature of Sound

These demonstrations present the basics of sound wave production and transmission.

H1-01 BELL IN VACUUM
Demonstrates sound wave requirement for a medium
H1-02 SPEAKER AND CANDLE
Demontrates longitudinal behavior of sound waves
H1-03: BELLS
Use bells as a sound source.
H1-04: BELL IN VACUUM - PORTABLE
Small version of the standard bell in vacuum demonstration.
H1-11: MICROPHONE AND OSCILLOSCOPE
Show the wave shape of various sounds.
H1-12: VISIBLE WAVEFORMS ON LARGE SPEAKER
Show the loudspeaker motion produced by waves of various shapes.
H1-13 WAVEFORM GENERATOR, SPEAKER AND OSCILLOSCOPE
Demonstrates waveform and sound of standard waves
H1-21: SPEED OF SOUND - PHASE CHANGE
Determine the speed of sound.
H1-22: SPEED OF SOUND - USING PULSES
Determine the speed of sound in air.
H1-24: SPEED OF SOUND IN HELIUM
Determine the speed of sound as a function of gas density.
H1-25: SPEED OF SOUND BETWEEN TWO MICROPHONES
Measure the speed of sound by determining the travel time of a pulse between two microphones.
H1-26: SPEED OF SOUND IN GARDEN HOSE
Direct measurement of the speed of sound in air.
H1-27: SPEED OF SOUND - LISSAJOUS FIGURES
Measurement of the speed of sound in air using Lissajous figures.
H1-31: SOUND LEVEL METER
Demonstrate use of a sound level meter.
H1-32: WAVETEK AND AUDIO CART - EQUAL SOUND LEVEL STEPS
Illustrate the effect on the ear of successive changes of exactly 10 dB.
H1-41: ULTRASONIC MOTION DETECTOR
Demonstrate how an ultrasonic motion detector works.
H1-43: ULTRASONICS AND HEARING
Demonstrate that there exist ultrasonic waves with frequencies above the range of human hearing.
H1-44: ULTRASONIC MOTION DETECTOR WAVE FORM
Show the wave form of the ultrasonic signal created by the ultrasonic motion detector.
H1-51: AUDIOTAPE 42 MIN - SCIENCE OF SOUND - SHORT VERSION
Illustrate various audio phenomena.
H1-52: AUDIOTAPE 82 MIN - SCIENCE OF SOUND - LONG VERSION
Illustrate various audio phenomena.
H1-53: AUDIOTAPE 8 MIN - WOMB SOUNDS
Hear heartbeats.