Bio-logic MASTER II is a physiologic audiometer. It is a must have addition to the clinical electrophysiological test battery for rapid multiple frequency threshold assessment in infants, young children or adults with special needs. It is a fast, accurate and objective program which offers a patented technology that obtains frequency-specific auditory. It provides a simultaneous testing up to 4 frequencies per ear 2. Through it, you can view a real-time EEG and spectrum. The table on the collection screen records the f-ratio for each frequency collected at each intensity level which results in an easy tracking of results. The MASTER II program offers masking for bone conduction or unilateral hearing loss3. The printing of physiological audiogram is available with air conduction, bone conduction & soundfield data on the same audiogram. It gives some user-defined stopping rules to halt collection when response criteria are not met. The program also offers a choice of montage using Cz to Nape or Cz to Mastoids.