BOSS, SANDRA - The Acoustic Appraiser

Edition of 300. Screenprinted cardboard cover. "All sound material created with a Qualitone Acoustic Appraiser analogue audiometer. The audiometer is a two-channel portable audiometer originally intended for conducting hearing tests. The audiometer comes with a tape machine and a tape that contains a speech test (in German). Each channel can be controlled independently with duplicate controls for tone, masking, microphone and tape. Frequency range 125 Hz to 8000 Hz. Pulse generator, hold and slope functions." - BIN.