An Etymological Dictionary of the German Language/Annotated/Schall
Schall, masculine, ‘loud sound, noise,’ from the equivalent Middle High German schal (genitive schalles), Old High German scal (ll), masculine; from this is derived Middle High German and Modern High German schallen, akin to Old High German scëllan, Middle High German schëllen, ‘to sound loudly, resound,’ Old Icelandic skjalla, ‘to rattle.’ From the Teutonic verb is derived the Romance term Italian squillare, ‘to ring, resound.’ See Schelle and Schilling.