Chladni
Plate
Chas.
S. Bourne Tuning Forks (Melde's apparatus)
Central
Scientific Sonometer
Helmholtz
Resonators
Helmholtz
Siren
Knipp's
Singing Tubes
Koenig
Optical Comparator
Large
Tuning Fork
Resonance
Bar
Welch
Driven Tuning Fork