'reduces the volume' is a perfectly correct and usable phrase in written English
You might use it in a sentence such as: "The volume-reducing headphones muted the sound of the busy room."
And Mack's Ear Saver, about $10, reduces the volume coming through your music player's headphones.
Physical treatment, on the other hand, concentrates, solidifies, or reduces the volume of the waste.
The first filter immediately rejects high-volume, low-value traffic, such as peer-to-peer downloads, which reduces the volume by about 30%.
Composting is magic: not only does it transform an entire class of waste into something valuable (rich soil); it consolidates and reduces the volume.
Compaction reduces the volume of refuse in the truck to less than half of its loose volume.
The applied pressure reduces the volume of a material, which returns to its original volume when the pressure is removed.
The campaign is part of Postal Service efforts to reverse its recent flagging fortunes as the economic slowdown reduces mail volume, particularly among businesses, and e-mail reduces the volume of traditional mail, particularly among consumers.
Because it dramatically reduces the volume needed for storing it—some 600-fold in the case of natural gas.But liquefaction doesn't come cheap.
Another sophisticated noise-suppression product is the "filtered earplug," a plastic device that reduces the volume of outside sound but does not alter its character.
But a bladder is constricting when unpressurized, and when it is inflated movement becomes even more difficult, because moving the joints reduces the volume, increasing the pressure inside.
(7) Compaction, as would occur with burial to depth, reduces the volume of pore space for sedimentary rocks and the crack porosity for crystalline rocks.
