53

An impact insulation class number below _____ is unacceptable for sound control

50

Smooth, hard building surfaces reflect up to _____% of the sound that strikes them

98

______ tile applied on a ceiling serves as an excellent sound absorber

Acoustical

The intensity of sound is expressed in _____

Decibels

To improve sound control, ______ on opposite sides of a hallway should be staggered

Door openings

Staggered-stud or ______ walls have greater resistance to sound transmission than conventionally studded walls

Double-stud

______ glass in windows helps reduce sound transmission

Insulated

Acoustical ________ is generally sprayed on ceilings

Plaster

High levels of sound in a room are caused by sound waves being _____ from wall, ceiling, and floor surfaces

Reflected

Acceptable _____ ratings range from approximately 39 to 65

STC