Source : Webster's Revised Unabridged Dictionary (1913)

Clangor \Clan"gor\, n. [L., fr. clangere. See {Clang}, v. t.]
   A sharp, harsh, ringing sound. --Dryden.

Source : WordNet®

clangor
     n : a loud resonant repeating noise; "he could hear the clang of
         distant bells" [syn: {clang}, {clangour}, {clangoring}, {clank},
          {clash}, {crash}]

clangor
     v 1: make a loud resonant noise; "the alarm clangored throughout
          the building" [syn: {clangour}]
     2: make a loud noise; "clanging metal" [syn: {clang}]