SPLE UTILITEIS Q6

Bending or “flowing” of a sound wave around an object or through an opening

• Reflection

• Diffusion

• Diffraction

• Absorption

Ceiling that can diffuse sound

• Perforated Ceiling

• Convex Ceiling

• Splay

• NOTA

Scattering or random redistribution of a sound wave from a surface

• Absorbtion

• Transmission

• Diffusion

• Reflection

Absorbs sound and keeps it too (thermal storage)

• Diffraction

• Insulation

• Absorbption

• Reflection

Absorbs sound and transmits excess sound to the next room

• Diffraction

• Insulation

• Absorption

• Reflection

A value given in decibels, which is determined by measuring sound pressure levels at a certain frequency in the

source and receiving rooms.

• NRC

• SAC

• TL

• SPLE

Reflection

The fraction of the randomly incident sound power which is absorbed, or otherwise not reflected.

• Noise Reduction Coefficient NRC

• Sound Absorption Coefficient SAC

• TL

• SPL

A single-number index for rating how absorptive a particular material is

• Noise Reduction Coefficient NRC

• Sound Absorption Coefficient SAC

• TL

• SPL

This is a single-number rating of a material’s or assembly’s barrier effect.

• SAC

• Noise Reduction Coefficient - NRC

• TL

• Sound Transmission Class - STC

Material with the lowest STC rating

• Cellulose

• Empty Wall

• Handi-foam

• Fiberglass