Electricity consonant source: One of stationary tone source about 2500Hz.
Resonating tube:
Made of transparent plexiglass
outer diameter 40mm,Inside diameter 34mm, length 330mm.
Measuring range: 0mm~320mm
Division: 1mm.
Resonating tube holder:
Made of white plexiglass:thickness 5m
Size: 450mm×100mm×30mm
Above installs two of the round hole clamp and one of plexiglass sound source place.