Demos by PIRA
3C10 The Ear
3C10.10Ear models.
3C20 Pitch
3C20.15Galton's whistle: Compressed air whistle.
3C20.16Limit of audibility: Set of rods that ring at different frequencies.
3C20.16Steel spring pendulum, inverted, vibrates at 10 Hz.
3C20.30Compressed air jet blows through spinning disk with holes.
3C20.30Siren: large, electric motor driven.
3C20.40Sprockets on shaft rotate against a card to make sound.
3C20.40Savart's wheel: Toothed wheel and cardboard or air jet.
3C30 Intensity and Attenuation
3C40 Architectural Acoustics
3C50 Wave Analysis and Synthesis
3C50.10Fourier synthesis.
3C50.12Casio electronic synthesizer with amp and speaker.