Chapter 8 Flashcards
Excellent absorbers of sound within a room, usually installed in metal ceiling grids that allow them to be removed for access to the plenum
Acoustic tiles
Howling when the system is turned up too loud
Acoustic feedback
Acoustic effect that happens when a system changes the shape of the acoustical signal that is receives. Some stages of the amplification are overloaded and some frequencies are incorrectly amplified
Distortion
A space with reflective surfaces that sustain the sound through several reflections before t attenuated to the point of inaudibility, aiding speech audibility and musical sounds.
Live space
Acoustic devices used for efficient low-frequency absorption consisting of a membrane of thin plywood or linoleum in from of a sealed air space that usually contains an absorbent material. The panel is set in motion by the alternating pressure of the sound wave and the sound energy is converted to heat.
Panel resonators
Any air passages such as keyholes, cracks around doors or windows, or gaps between walls and floor that form acoustic bridges
Sound leaks
A rating of the performance of a building material or construction assembly in preventing transmission of airborne sound; measures the average transmission of loss over a wide range of frequencies.
Sound transmission class (STC)
Partitions framed with two separate rows of studs arranged in a zigzag fashion and supporting opposite faces of the partition producing a wider wall
Staggered-stud partitions
Energy delivered by a source that directly vibrates or hits the structure
Structure-borne sound
A measure of the performance of a building material or construction assembly in preventing transmission of airborne sound
Transmission Loss (TL)
Knocking noise in a pipe turned off rapidly
Water hammer
