Absorption coefficient: A specification to indicate the sound energy lost during the transition at a surface. The range runs from a maximum of 1.00 (an open window) to 0.00 (100% reflection).
Active balanced interconnection: A balanced-line connection to or from a powered (active) input or output device.
Active electronic device: An audio device that receives power from an external source (or battery) in order to carry out its signal-processing functions. An active device is capable of providing amplification of the signal.
AES/EBU: The standard protocol for packetized digital audio transmission.
Air absorption loss: High-frequency attenuation that accrues over transmission distance in air. The humidity, ambient temperature and atmospheric ...