0 present participle of quieten
1 to (cause someone to) become calmer or less noisy:
The barking dogs quietened (down) when they recognized me.
As the opening flute tune moves to the strings, the harp intones a bare melody, quietening the orchestra.
There is now firm evidence of substantial progress in the quietening of aircraft engines.
We will run into extraordinary difficulties in quietening the demands of people who have slipped outside in this way.
The first and most popular among people who have not studied the problem is the quietening of engines, thus dealing with noise at the source.
We are studying with research organisations concerned many aspects of vehicle and traffic noise, including the possibilities of quietening large diesel engines.
Secondly, the quietening of existing aircraft by hush kits is much easier said than done.
Fortunately, there has been a dramatic quietening of aircraft.
With the introduction of the initial scheme, attention is now being turned to the possibility of quietening current types of aircraft.
