In other languages, it is called as follows: Romanian: toacă; Russian: било, bilo; Bulgarian, Macedonian, Serbian: клепало, klepalo; Arabic: ناقوس, nāqūs; Armenian: կոչնակ, kochnak or gochnag.
[2] Although simple, the instrument nonetheless produces a strong resonance and a variety of different intonations, depending on the thickness of the place struck and the intensity of the force used, so that quite subtle results can be obtained.
[2] In the traditional monastic ritual, before each service the assigned player takes a wooden semantron and, standing before the west end of the catholicon, strikes on it three hard and distinct blows with the mallet.
[2] While continuing in daily use at monasteries and sometimes featuring at funerals for their deep notes sounded at long intervals, as well as at other services, semantra have played a long-lasting part in Orthodox history.
[8] Of Levantine and Egyptian origin, its use flourished in Greece and specifically on Mount Athos before spreading among Eastern Orthodox regions in what are now Bulgaria, Romania, Moldova, Serbia, Montenegro, Bosnia and Herzegovina and North Macedonia.
[2][8][11] One reason why semantra continue to be used in southeastern Europe in particular is that the ringing of bells was outlawed during Ottoman times under Islamic rule, forcing monasteries to use the semantron instead; the practice then became customary.
[3] Today, its use is restricted to the Altai region and Siberia, as well as Old Believer sketes, the latter retaining the aloofness toward outsiders that has characterised the group since it broke away from the main body of the Russian Orthodox Church (see Raskol).