Absorption in acoustics is when energy of sound waves enters the surface of a material rather than being reflected off the surface. Materials are rated by their ability to absorb sounds.
Acoustical Efficiency is how efficiently a particular wall or ceiling space absorbs, blocks and covers sound.
Acoustical Preferred Curve is a range of background sound masking spectra at octave-band frequencies from 250 Hz to 800 Hz. Spectra assists sound levels to drop off by 5 dB per octave. These spectra provide a pleasant acoustical background that masks unwanted, intruding speech and sounds.
Amplitude is the maximum variation of any wave from the mean value. As the amplitude of a sound wave increases, so does its volume.
Articulation class (AC) measures sound reflected from the ceiling to adjacent work spaces in open-plan environments.
