GRAS 43BB-4 Low-noise Ear Simulator System
Volume: 1260 mm³ @ 500 Hz
Dyn range: 10.5 dB(A) to 113 dB
Based on IEC 60318-4
The 43BB-4 Low-noise Ear Simulator System is for acoustic low noise measurements on headphones, especially headphones with active noise cancellation. It is based on the IEC 60318-4 ear simulator standard. 43BB-4 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-4 read the product introduction below.
Technology
Introduction
The GRAS 43BB-4 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 an 8-degree angled adapter for the preamplifier with a built-in short 40 cm cable and therefore can be used in binaural setups inside test fixtures like the GRAS 45CB.
43BB-4 is part of the GRAS 45CB-S4 Acoustic Test Fixture according to ANSI S12.42, low noise.
Read about the 43BB here
Specifications
The noise floor (solid line) is typically below the threshold of human hearing (dashed line).
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.
Ordering info
Included Items
| GRAS RA0234 | Low-noise Ear Simulator |
| GRAS 40AH | 1/2" Ext. Polarized Pressure Microphone, High Sensitivity |
| GRAS 26HG | 1/4" Preamplifier with 40cm Integrated Cable |
| GRAS 26HT | Gain and Filter Unit for 40HT |
| GRAS 12HF | 1-Channel Power Module for Low-noise Systems |
Accessories
| GRAS 42AA | Pistonphone, Class 1 |
| GRAS 42AP | Intelligent Pistonphone, Class 0 |
| GRAS RA0090 | 94 dB Pistonphone Coupler |
| GRAS RA0237 | Straight Ear Canal Extension Kit for KEMAR |
| GRAS RA0172 | Pinna Holder Kit |
| GRAS AA0046 | 3 m LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system |
| GRAS AA0047 | 10 m LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system |
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
