AudioScope 3 is a Audiometer manufactured by Welch Allyn.
AudioScope 3 Portable Screening Audiometer Operating Instructions
AudioScope/AudioScope 3 Screening Audiometers
AudioScopeTM / AudioScope 3 Screening Audiometers Models: 23020, 23000, 23040 Service Manual
Audiomètre portatif de dépistage Guide d’utilisation