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2 wave siren disks

2 wave siren disks

Rudolph Koenig
circa 1875
canister of banding sand for Chladni plates

canister of banding sand for Chladni plates

Central Scientific Company
1948
Chladni plate

Chladni plate

Rudolph Koenig
circa 1889
electromagnetic resonator

electromagnetic resonator

Rudolph Koenig
circa 1889
handheld Chladni plate

handheld Chladni plate

Rudolph Koenig
circa 1889
Helmholtz vowel resonator, A

Helmholtz vowel resonator, A

Rudolph Koenig
circa 1865
Helmholtz vowel resonator, E

Helmholtz vowel resonator, E

Rudolph Koenig
circa 1865
Helmholtz vowel resonator, I

Helmholtz vowel resonator, I

Rudolph Koenig
circa 1865
Helmholtz vowel resonator, OU

Helmholtz vowel resonator, OU

Rudolph Koenig
circa 1865
Helmholtz vowel resonator, U

Helmholtz vowel resonator, U

Rudolph Koenig
circa 1865
Knipp's singing tubes

Knipp's singing tubes

Central Scientific Company
circa 1925
Opelt siren

Opelt siren

Rudolph Koenig
circa 1865
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