Air Column Instruments Concept

Demonstrations in Air Column Instruments

Four Yamaha recorders arranged from largest (bass) to smallest (soprano), dark brown bodies with white joints and finger holes

Wind Instruments

A collection of recorders, PVC flutes, and a Xaphoon demonstrates air column resonance and standing waves. Students hear how instrument length determines pitch and can compare edge-tone (recorder/flute) and reed-based …
Two metallic cylindrical resonator tubes on tripod stands with speaker drivers mounted on top, connected by cables to an Agilent function generator
Safety

Variable Length Resonators

Demonstrates acoustic resonance in open and closed air columns. Students hear how resonance depends on tube length and driving frequency, distinguish open vs. closed pipe harmonic series, and can measure …
Small yellow metal cylinder decorated with a cartoon parrot and musical notes, attached to a long white string, lying on a gray surface
Safety

Spinning Whistler

A hollow metal cylinder with a longitudinal slit is spun on a string, producing a high-pitched whistle. Faster spinning raises the pitch, demonstrating the relationship between edge velocity and sound …
Wooden organ pipe with rectangular body, tapered air inlet at left, duct-tape-framed viewing window in the middle, and turned wooden bell at right with pitch-control lever visible
Safety

Organ Pipe with Reed

Compressed air drives a metal reed in an organ pipe, producing a loud buzzing tone. A lever changes the reed's effective vibrating length to shift the pitch, demonstrating the relationship …
Two square wooden organ pipes of different lengths lying on a gray surface, each with an adjustable stop at the top and a turned wooden finial at the bottom
Safety

Organ Pipes with Adjustable Stops

Demonstrates the inverse relationship between air column length and resonant frequency. Students hear pitch change in real time as the adjustable stop slides in and out, making immediately audible.
B-flat trumpet standing on its bell, showing brass body, three piston valves, and silver-plated mouthpiece

Trumpet

Demonstrates the dependence of pitch on air column length. The B-flat trumpet's 148 cm tube supports a harmonic series; pressing valves adds tubing to lower the pitch by specific intervals. …
Orange pBone plastic trombone with gray slide tubes extended, lying on a gray table

Trombone

Demonstrate the dependence of pitch on air column length. The trombone's slide provides continuous, visible length changes with immediate auditory feedback, reinforcing the inverse relationship between tube length and resonant …
Professional panpipes made of giant cane with graduated tube lengths, bound by colorful Andean woven textile straps

Panpipes

Demonstrates the inverse relationship between pipe length and resonant frequency in closed-end air columns. Students hear directly that shorter pipes produce higher pitches, connecting physical dimensions to the standing wave …