Perhaps you should try some spelling variations:
decrease sound » decrease sod (Expand search), decrease soon (Expand search), decrease and (Expand search)
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease in (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
sound objects » and objects (Expand search), sound effects (Expand search), boundary objects (Expand search)
decreased to » decreased the (Expand search), decreased tgf (Expand search), decreased in (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decreased to decrease risk decrease ) OR ( decrease NOT decrease sound objects ))~.