'Shrilling' definitions:

Definition of 'shrilling'

noun

A continuing shrill noise; "the clash of swords and the shrilling of trumpets"--P. J. Searles

From: GCIDE

Shrill \Shrill\, v. i. [imp. & p. p. Shrilled; p. pr. & vb. n. Shrilling.] [OE. schrillen, akin to G. schrillen; cf. AS. scralletan to resound loudly, Icel. skr["o]lta to jolt, Sw. skr[aum]lla to shrill, Norw. skryla, skr?la. Cf. Skirl.] To utter an acute, piercing sound; to sound with a sharp, shrill tone; to become shrill. [1913 Webster]
Break we our pipes, that shrilledloud as lark. --Spenser. [1913 Webster]
No sounds were heard but of the shrilling cock. --Goldsmith. [1913 Webster]
His voice shrilled with passion. --L. Wallace. [1913 Webster]