The AVANT A2D+ is a dual channel, air, bone, speech and masking audiometer. It offers pure tone audiometry via earphones and bone conduction, masking and speech audiometry with SRT (Speech Recognition Threshold), WR (Word Recognition), SISI (Short Increment Sensitivity Index), ABLB (Alternate Binaural Loudness Balance), Stenger, Tone Decay Tests, QuickSIN and Automated Audiometry.