"increasingly quiet" is correct and usable in written English
You can use it to describe a situation where the noise level is gradually decreasing. For example: "The room became increasingly quiet as everyone focused on the presentation."
Meanwhile, in an increasingly quiet corner of the world, the critic is dispelling fantasies and fallacies; he is systematizing chaos.
The crowd seemed increasingly quiet, even subdued in places, as it moved closer to the Capitol stage.
In Vedic, or transcendental meditation, the aim is to make thought processes increasingly quiet – the ideal state is when the mind transcends thought.
The other name frequently mentioned is the bishop of London, Richard Chartres, who is opposed to the ordination of women, but has been increasingly quiet.
The other name frequently mentioned is the bishop of London, Richard Chartres, who is opposed to the ordination of women but has become increasingly quiet.
BG Manchester City reach last eight of Women's Champions League Premier League must fight the tide of increasingly quiet crowds "It is always a big game against Spurs," said Slaven Bilic this week.
Mr. Nieporent put on his gas mask and as the group was let through the checkpoints, past a Campbell's soup tent, he surveyed the sidewalks and became increasingly quieter.
He is also increasingly winning the quiet support of other EU leaders.
"People who want peace and quiet increasingly want to move to Wellfleet," said Elaine McIlroy, director of the Wellfleet Public Library.
And the hotel industry has been turning to people like Mr. Johnson, whose company makes a range of sound-insulation construction products, because hotel guests are increasingly demanding a quiet night's sleep.
They still spit beer at the graves of fallen colleagues (and adorn themselves with swastikas at times), but despite the group's history of violence, drug abuse and disregard for traffic laws, increasingly there are quiet nights, not just noisy rallies.
