loudening

I was ashamed, but even so, I didn't want to hear about global warming, global dimming, or the damage humans are doing to the aural environment (global loudening?).

Beth Teitell: I Wish I Wanted to be an Environmentalist 2008

“Well, how do you like THIS.” and “This is where you DIE!” accompanied by a gradual loudening.

The 8 Things I’m Sick Of Seeing In Movies | The Movie Blog 2007

Taking her hand, the chanting growing, loudening, her head turning, the shock of a yellowed, drowned skull.

The Miko Lustbader, Eric 1984

The officer, in turn, directed our agents in the city "-- Rax, of course, and those in Rax's pay, Flandry thought through the loudening wind --" to keep close watch on this young male.

A Circus of Hells Anderson, Poul, 1926- 1969

Sunlight lay in gold bars across the dark trellis ironwork of the stairs; the murmur of the crowd was loudening as I neared the ring of oriels.

The 9th Directive Hall, Adam 1966

Sound came from the distance, clapping, cheering, at first faint, loudening, so I moved round to the back of the room and wiped the sweat from my hands for the last time, wrists, palms, between the fingers, carefully between the fingers of the right hand.

The 9th Directive Hall, Adam 1966

As he spoke there came a shrill, loudening whine, and an explosion that shook the barn.

One Man's Initiation—1917 John Dos Passos 1933

They struck the beach first a mile away and the battle ran towards her like fire along tinder, boomed towards her ever loudening till it broke to right and left where the sea bulls flung themselves on the rocks and the land bulls charged the on-comers like battering rams.

The Beach of Dreams 1907

The shore was drawing away before him, the surf loudening behind him, yet he could do nothing.

The Blue Lagoon: a romance 1907

A sharp approaching whistle, an ever-loudening roar in that brooding silence out there aroused him to a sense of his surroundings.

Frank of Freedom Hill 1901