Open tube
Encyclopedia
In the field of acoustics
, a tone is created by the periodic vibrations of air. There are several ways in music to create such vibrations. One of these is to use a tube and to blow across the end. This creates a note of a given frequency, depending on the length of the tube and the pressure of the air.
An open tube is a tube in which both ends are open. The tube resonates
at a single fundamental frequency or note.
An open tube resonates
at the same frequency as a closed tube
of half its length. In an open tube, an antinode always appears at each open end.
By overblowing
an open tube, a note is obtained that is an octave above the fundamental note of the tube.
For example, if the fundamental note of an open pipe is c1, then overblowing
the pipe gives c2, which is an octave above c1.
Acoustics
Acoustics is the interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics...
, a tone is created by the periodic vibrations of air. There are several ways in music to create such vibrations. One of these is to use a tube and to blow across the end. This creates a note of a given frequency, depending on the length of the tube and the pressure of the air.
An open tube is a tube in which both ends are open. The tube resonates
Resonance
In physics, resonance is the tendency of a system to oscillate at a greater amplitude at some frequencies than at others. These are known as the system's resonant frequencies...
at a single fundamental frequency or note.
An open tube resonates
Resonance
In physics, resonance is the tendency of a system to oscillate at a greater amplitude at some frequencies than at others. These are known as the system's resonant frequencies...
at the same frequency as a closed tube
Closed tube
In the field of acoustics, a tone is created by the periodic vibrations of air applied to a resonator. There are several ways in music to create such vibrations. One of these is to use a closed tube and to blow across the end. This creates a Bernoulli, or "siphon", effect just below the open end or...
of half its length. In an open tube, an antinode always appears at each open end.
By overblowing
Overblowing
Overblowing A technique used while playing a wind instrument which, primarily through manipulation of the supplied air , causes the sounded pitch to jump to a higher one...
an open tube, a note is obtained that is an octave above the fundamental note of the tube.
For example, if the fundamental note of an open pipe is c1, then overblowing
Overblowing
Overblowing A technique used while playing a wind instrument which, primarily through manipulation of the supplied air , causes the sounded pitch to jump to a higher one...
the pipe gives c2, which is an octave above c1.
See also
- Closed tubeClosed tubeIn the field of acoustics, a tone is created by the periodic vibrations of air applied to a resonator. There are several ways in music to create such vibrations. One of these is to use a closed tube and to blow across the end. This creates a Bernoulli, or "siphon", effect just below the open end or...
- SoundSoundSound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.-Propagation of...
- AcousticsAcousticsAcoustics is the interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics...
- Physics of music
- Vibrating stringVibrating stringA vibration in a string is a wave. Usually a vibrating string produces a sound whose frequency in most cases is constant. Therefore, since frequency characterizes the pitch, the sound produced is a constant note....