Introduction

The GRAS 43BB-1 is a low-noise, high-sensitive earsimulator system for measurements of soundpressure levels close to or below the threshold ofhuman hearing.It is identical to the 43BB Low-noise Ear SimulatorSystem except that it uses an angled adapter for thepreamplifier, and therefore can be used in binauralsetups inside a 45BB KEMAR or a 45BC.43BB-1 is part of the 45BB-12 KEMAR withAnthropometric Pinna for Low-noise Ear- andHeadphone Test 2-Ch LEMO, and 45BC-12 KEMARwith Mouth Simulator and Anthropometric Pinnaefor Low-noise Headset Test, 2-Ch LEMO.