Sound & Waves

Physics Demonstrations in Sound & Waves Parts I, II, III

Examination of standing sound waves in a gas column using a flame tube.	Resonating bell viewed using real-time interferometric holography and a strobed laser.	Slow motion observation of interfering waves on a coil spring.
Physics Demonstrations in Sound & Waves is a three-part video program which presents a full range of demonstrations in the areas of sound, vibrations, and wave behavior. The program was developed in an effort to give physics teachers a comprehensive collection of video demonstrations, supplementing the instructor’s live classroom demonstrations. Three-dimensional computer animation is used to augment many of the demonstrations, providing a graphical representation of the physical behavior.
Program Format Individual demonstrations are 3 to 4 minutes in length and can be quickly accessed using the program's on-screen indexing system. The indexing system allows the teacher to select a particular demonstration and show it at the appropriate time during a unit on sound & waves. The accompanying teacher’s guide gives additional data, information, and suggestions on using the demonstrations to promote further classroom discussion. Demonstration Selection and Filming Techniques The selection of demonstrations includes those which are difficult to perform in the classroom and those requiring apparatus not readily accessible to many physics teachers. Detailed observation of the demonstrations is accomplished through use of a filming approach which focuses solely on the apparatus, allowing the teacher to utilize the program in a way which is consistent with his or her personal instructional approach. The voice over narration eliminates the on-screen presenter and allows attention to be directed to the physical behavior being studied.

Physics Demonstrations in
Sound & Waves: Part I

Physics Demonstrations in
Sound & Waves: Part II

Physics Demonstrations in
Sound & Waves: Part III

Mechanical Resonance:
Forced Vibrations with Single
and Coupled Oscillators
Velocity/Wavelength & Frequency/Reflected Waves:
Transverse Waves on a Coil Spring
Change in Medium/Interference:
Transverse Waves on a Coil Spring
Standing Waves:
Vibrational Modes on a String
Longitudinal Waves:
Propagation/Interference of
Longitudinal Waves
Longitudinal Standing Waves:
Stroboscopic Analysis of
Standing Wave Behavior
Waves in Two-Dimensions:
Reflection and Refraction
of Waves in a Ripple Tank
Waves in Two-Dimensions:
Interference and Diffraction
of Waves in a Ripple Tank

Length: 30 Minutes
VHS: $68.00
DVD: $78.00
(Teacher’s Guide Included)

Nature of Sound Waves:
Sources and Propagation of Sound
Propagation of Sound:
Direct Measurement of the Speed
of Sound in Air and Metal
Transmission of Sound
Through a Medium:
Attenuation of Sound in a Vacuum
Refraction of Sound:
Carbon Dioxide Sound Lens
Interference of Sound:
Sound Divided into Two Paths
of Differing Length
Interference of Sound:
Beat Phenomena
Diffraction of Sound:
Bending of Sound by an Obstacle
Doppler Effect:
Frequency Shift of Moving
Sound Source

Length: 30 Minutes
VHS: $68.00
DVD: $78.00
(Teacher’s Guide Included)

Standing Sound Waves:
Resonating Air Column with Cork Dust
Standing Sound Waves:
Resonance with Illuminating Gas
in a Flame Tube
Standing Sound Waves
in Two-Dimensions:
Illuminating Gas in a Resonating Cavity
Resonance/Real-Time
Strobe Holography:
Resonant Modes of a Vibrating Bell
Vibrations in a
Two-Dimensional Surface:
Chladni Plate
Superposition Principle:
Fourier Analysis & Synthesis of
Complex Musical Tone
Quality of Sound/Harmonics:
String Vibrations on a Guitar
Frequency Spectrum of Sound:
Audible and Ultrasonic Waves

Length: 30 Minutes
VHS: $68.00
DVD: $78.00
(Teacher’s Guide Included)

The Complete Set of
Physics Demonstrations in Sound & Waves - Parts I, II, III
VHS: $185.00 DVD: $210.00