Change ringingChange ringing is the art of ringing a set of tuned bells in a tightly controlled manner to produce precise variations in their successive striking sequences, known as "changes". This can be by method ringing in which the ringers commit to memory the rules for generating each change, or by call changes, where the ringers are instructed how to generate each change by a conductor.
Manual bell ringingThe manual ringing of bells is a traditional method of striking a bell using a rope or a handle attached to the bell. This method has been used for centuries in churches, schools, and other buildings in order to announce the start of a mass or an event, or to call the attention of the population. Ringing bells manually consists of pulling the rope or handle in order to move the bell or the clapper from side to side, causing the bell to sound.
Mini-ringA Mini-Ring is a peal of small bells hung for change-ringing. They are used for training, demonstrational, and leisure purposes. Although normally hung in secular or private settings, several mini-rings are hung in churches.
Doppler effectThe Doppler effect (also Doppler shift) is the change in the frequency or, equivalently, the period of a wave in relation to an observer who is moving relative to the source of the wave. It is named after the physicist Christian Doppler, who described the phenomenon in 1842. A common example of a Doppler shift is the change of pitch heard when a vehicle approaches and recedes from an observer.
TrunnionA trunnion (from Old French'trunk') is a cylindricalprotrusion used as a mounting or pivoting point. First associated with cannons, they are an important military development. In mechanical engineering (see the trunnion bearing section below), it is one part of a rotating joint where a shaft (the trunnion) is inserted into (and turns inside) a full or partial cylinder.
Bolognese bell ringingBolognese bell ringing (Italian: sistema bolognese, suono alla bolognese, arte campanaria bolognese or campaneria bolognese) is a traditional system of manual bell ringing developed in Bologna, Italy. It is a form of full circle, manual ringing in which bells are swung to produce rhythmic patterns. Its characteristic performances take place inside the bell chamber, with bell-ringers standing close to the bells, wooden frames, short ropes and clappers.
Circular arcA circular arc is the arc of a circle between a pair of distinct points. If the two points are not directly opposite each other, one of these arcs, the minor arc, subtends a central angle that is less than πradians (180 degrees); and the other arc, the major arc, subtends an angle greater than π radians. An arc of a circle is defined as a part of the circumference of the circle. A straight line that connects the two ends of an arc is known as a chord of the circle.
Veronese bell ringingVeronese bell ringing is a style of ringing church bells that developed around Verona, Italy, from the eighteenth century. The bells are manually rung full circle (mouth uppermost to mouth uppermost), being held up by a rope and wheel until a note is required.*As an Amazon Associate I earn from qualifying purchases.