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深圳市为远科技有限公司
深圳市为远科技有限公司
The 43BB-1 Low-noise Ear Simulator System is for acoustic low noise measurements on insert headphones, especially headphones with active noise cancellation. It is based on the IEC 60318-4 ear simulator standard.
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.
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