That it is felt and not heard explains its loudness and its grating quality.
"I don't care who hears me," Adams said, harshly, though he tempered his loudness.
They proved very effective, especially in the loudness of the report when fired.
Heard from close by, where Maya sat, the music was overpowering in its loudness.
Three qualities distinguish sound: loudness, pitch, and timbre.
The shouts and cries of the terrified settlers increased in loudness.
The loudness depends on the force of the blast of air; the character depends largely on the bugle.
Giacomo appropriated the discovery, perforce of loudness, after the fashion of his sex.
The loudness of my voice, I doubt not, often drowns the thing I would say; and some day or other Time will find me out.
The parts differ from each other in pitch, time, or loudness.
Old English hlud "noisy, making noise, sonorous," from West Germanic *khluthaz "heard" (cf. Old Frisian and Old Saxon hlud, Middle Dutch luut, Dutch luid, Old High German hlut, German laut "loud"), from PIE past participle *klutos- (cf. Sanskrit srutah, Greek klytos "heard of, celebrated," Armenian lu "known," Welsh clod "praise"), from root *kleu- "to hear" (see listen).
Application to colors first recorded 1849. The adverb is from Old English hlude, from Proto-Germanic *khludai (cf. Dutch luid, German laut). Paired with clear since at least c.1650.