Double siren
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| - | The '''double siren''' is an instrument used in experiments in the theory of music, due to the fixed ratio of the frequencies between the individual tones. It is capable of producing octaves, fifths, fourths, major and minor thirds, whole and semi-tones, beats, cancellations, etc. | + | The '''double siren''' is an instrument used in experiments in the theory of music, due to the fixed ratio of the frequencies between the individual tones. It is capable of producing octaves, fifths, fourths, major and minor thirds, whole and semi-tones, beats, cancellations, etc. It consists of two rotating disks containing holes. As air is periodically forced through the holes, a distinct tone is created. Notable experiments include the vibration of overtones, interference, tonal depth, and combined tones. |
| - | In 1885, Helmholtz published the first description of this instrument, in his ''Die Lehr von den Tonempfindungen'' (''On the Sensations of Tone''). | + | In 1885, Helmholtz published the first description of this instrument, in his ''Die Lehr von den Tonempfindungen als physiologische Grundlage für die Theorie der Musik'' (''On the Sensations of Tone as a Physiological Basis for a Theory of Music''). Each disk on his siren contained eight series of holes for producing multiple musical notes. To clarify the notes, brass chambers were placed over each siren to dampen any extra frequencies. |
==References== | ==References== | ||
*Hafter, Ervin. ''[http://ear.berkeley.edu/auditory_lab/bellows.html Helmholtz's Double Siren]''. Berkeley Audiotory Perception Lab. URL accessed 2006-02-20. | *Hafter, Ervin. ''[http://ear.berkeley.edu/auditory_lab/bellows.html Helmholtz's Double Siren]''. Berkeley Audiotory Perception Lab. URL accessed 2006-02-20. | ||
*Kohl, Max. ''Physical Apparatus''. Price List No. 50. Vols II and III. p 422. | *Kohl, Max. ''Physical Apparatus''. Price List No. 50. Vols II and III. p 422. | ||
| + | *Pantalony, David. "Rudolph Koenig’s Workshop of Sound: Instruments, Theories, and the Debate over Combination Tones". ''Annals of Science''. Vol. 62, No. 1, January 2005, 57–82. | ||
Revision as of 01:18, 27 February 2006
The double siren is an instrument used in experiments in the theory of music, due to the fixed ratio of the frequencies between the individual tones. It is capable of producing octaves, fifths, fourths, major and minor thirds, whole and semi-tones, beats, cancellations, etc. It consists of two rotating disks containing holes. As air is periodically forced through the holes, a distinct tone is created. Notable experiments include the vibration of overtones, interference, tonal depth, and combined tones.
In 1885, Helmholtz published the first description of this instrument, in his Die Lehr von den Tonempfindungen als physiologische Grundlage für die Theorie der Musik (On the Sensations of Tone as a Physiological Basis for a Theory of Music). Each disk on his siren contained eight series of holes for producing multiple musical notes. To clarify the notes, brass chambers were placed over each siren to dampen any extra frequencies.
References
- Hafter, Ervin. Helmholtz's Double Siren. Berkeley Audiotory Perception Lab. URL accessed 2006-02-20.
- Kohl, Max. Physical Apparatus. Price List No. 50. Vols II and III. p 422.
- Pantalony, David. "Rudolph Koenig’s Workshop of Sound: Instruments, Theories, and the Debate over Combination Tones". Annals of Science. Vol. 62, No. 1, January 2005, 57–82.
