The second test is of noise and interference levels, and measures in particular where the card's background noise is located and its sensitivity to interference from the computing environment: power supply, transformers and monitors.
Dynamic range, dB:
Dynamic range (A-weighted), dB:
DC offset, %:
Related to the above test, the dynamic range test gauges the level of noise generated in the presence of a sound signal, in this instance, a sine wave (1 kHz at -60 dB) at card input.