Each and every bell is unique, both musically and artistically.

Every bell is individually constructed to attain its desired end. When a pre-existing assemblage of bells is completed, or added to, the most important partial tones of the already existing bells are first analysed. Depending on the musical requirements or cultural traditions which have to be adhered to. The new bell is first defined through its future chime harmony and the bell form is calculated. The specifications for the bell which result lead to a single intensively perceptible main tone, the so-called strike tone or nominal.

 

A medium heavy octave bell with an a/1 strike tone weighs about 450 kg. In southern countries, bells with an a/1 strike tone and a thinner bell form weigh about 370 kg, whereas some bells in larger bell combinations with an a/1 strike tone and a heavy form weigh about 850 kg. For carillons, the weight of an a/1 bell is calculated to harmonize with the sizes of the other bells in the collection.

 

At Grassmayr Bell Foundry, an a/1 bell for the Berlin Symphony Orchestra,  to name but one example, was cast at 444 Hertz, contrary to ordinary bell calculations for a/1 = 440 Hertz (the Hertz unit equals the number of vibrations per second).

 

The larger a bell is, the deeper its partial tones are. A bell with an a/3 strike tone weighs about 8 kg, while a much deeper sounding a/0 tone bell weighs about 4 tons.

 

The lists which are enclosed as pdf-file attachments with bell weights and diameters give a general idea of guidelines for purposes of orientation. The actual measurements, however, depend on the desired type of bell form and the required partial tones. 

 

Bell variations  >> GRASSMAYR - Rippenvarianten für Läuteglocken

  >> GRASSMAYR - Läuteglocken mittelschwere Rippe fileadmin/bilder-inhalt/pdfs/GRASSMAYR_Laeuteglocken_mittelschwere_Rippe_2011.pdf 

Bell variations  >> GRASSMAYR - Glockenspielglocken  

 

 

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