Dynamic Range - The difference between the loudest and quietest signal levels in a system. In an audio device, usually the difference between the maximum output level and the residual noise floor. In a digital system, the available dynamic range is determined by the data resolution, about 6 dB per digital bit. Hence, a 16-bit system theoretically provides a 96 dB dynamic range.

Dynamic Range (Acoustic) - The difference in decibel level between the loudest and the quietest sound produced by an instrument or sound source.

Dynamic Range (Electronic) - The difference in decibel level between the noise floor of a signal and the clip ping level. When applied to a piece of gear, it refers to the amount of clear signal the unit is capable of processing.