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. 43BB-1 Low-noise Ear Simulator System" includes a GRAS 12HF 1-Channel Power Module for Low-noise Systems.
43BB is shown in the product picture. For more information about 43BB-1 read the product introduction below.
Technology
Introduction
The GRAS 43BB-1 is a low-noise, high-sensitive ear simulator system for measurements of sound pressure levels close to or below the threshold of human hearing.
It is identical to the 43BB Low-noise Ear Simulator System except that it uses a 90-degree angled adapter for the preamplifier, and therefore can be used in binaural setups inside a 45BB KEMAR or a 45BC.
43BB-1 is part of the 45BB-12 KEMAR with Anthropometric Pinna for Low-noise Ear- and Headphone Test 2-Ch LEMO, and 45BC-12 KEMAR with Mouth Simulator and Anthropometric Pinnae for Low-noise Headset Test, 2-Ch LEMO.
Read about the 43BB here.
Specifications
| Parameter |
Unit |
Value |
| Connector type |
– |
3 m 7-pin LEMO |
| Polarization / Connection |
– |
0 V / CCP |
| Theoretical dynamic range lower limit with GRAS preamplifier |
dB(A) |
10.5 |
| Theoretical dynamic range upper limit with GRAS preamplifier @ +28 V / ±14 V power supply |
dB |
113 |
| Coupler volume |
mm³ |
1260 @ 500 Hz |
| CE / RoHS compliant / WEEE registered |
– |
Yes / Yes / Yes |
Noise floor and frequency response for 43BB-1 is identical to the 43BB:
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The noise floor (solid line) is typically below the threshold of human hearing (dashed line).
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The frequency response is very similar to the standard 60318-4 ear simulator up to 10 kHz
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Dimensions
Dimensions in mm
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