Airborne Noise & Structure Borne Noise
Airborne Noise is noise that is travels through the air such as speech, television, radio, etc. Airborne noise is typically controlled by weight and mass; the heavier the floor/ceiling or interior walls are the better its ability to stop or insulate airborne noise.
Airborne noise is tested using the ASTM E413-04 test. It is a single-number rating system that is used to compare the sound insulation of interior walls or floors tested in laboratory conditions (STC) or the actual sound isolation between different floor/rooms in the field (FSTC).
Structure Borne Noise is noise that is cause by an impact, this noise includes: walking or foot fall noise, dragging chairs, objects dropping, etc.
Structure borne noise is tested using the ASTM E492-04 test for laboratory measurements (IIC) and the ASTM E1007-04e1 test for field measurements (FIIC) using a tapping machine. Tests evaluate the impact sound-insulating performance of a floor-ceiling assembly and are also a single-number rating system. Soundproofing Floors Underlayments are used to isolate a hard surface floor form the sub floor.