3 Oscillations & Waves

Slide whistle - Video

demonstration image
Catalog: 
3D32.30B
Location: 
3_1
Video Encyclopedia :The variable length organ pipe.

Speaker and Baffle

A small speaker is much louder when placed behind this baffle.
Catalog: 
3B55.30
Location: 
Bc2
Music is played through a small, cheap speaker. The speaker is first held in the hand and then placed behind a small hole in a baffle, with dramatic improvement in sound quality.

Bell in a Vacuum

Catalog: 
3B30.30A
Location: 
Bc1
An electric bell is placed in an evacuated jar.

Bowling ball pendulum resonance - Video

demonstration image
Catalog: 
3A60.35
Location: 
3_1
Video Encyclopedia :Strike a bowling ball pendulum with random blows, then with blows at the normal frequency.

Melde's vibrating string - Video

demonstration image
Catalog: 
3B22.10
Location: 
3_1
Video Encyclopedia :Three strings driven by the same driver have weights of 0.9:2:8 to produce the first, second, and third harmonics.

Two speaker interference - Video

demonstration image
Catalog: 
3B55.10B
Location: 
3_1
Video Encyclopedia :Speakers in phase are mounted at the ends of a rotatable bar.

Xylophone bars - video

demonstration image
Catalog: 
3D40.10
Location: 
3_1
Video Encyclopedia :Use a microphone and oscilloscope to display the waveforms of various notes on a xylophone.

Guitar Sound and Data Studio

A tuning fork for "F" 330 Hz is used to compare with the first string of the gui
Catalog: 
3D20.21B
Location: 
A microphone reconds F from a tuning fork. This is then compared to the note F played on the first string of the guitar.

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