GRAS 43BB-1 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-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

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:


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. 

Dimensions

Dimensions in mm

Ordering info

Included Items

GRAS RA0234Low-noise Ear Simulator
GRAS 40AH1/2" Ext. Polarized Pressure Microphone, High Sensitivity
GRAS 26HG1/4" Preamplifier with 3 m Integrated Cable
GRAS 26HTGain and Filter Unit for 40HT
GRAS 12HF1-Channel Power Module for Low-noise Systems

Accessories

GRAS 42AAPistonphone, Class 1
GRAS 42APIntelligent Pistonphone, Class 0
GRAS RA009094 dB Pistonphone Coupler
GRAS RA0237Straight Ear Canal Extension Kit for KEMAR
GRAS RA0172Pinna Holder Kit
GRAS AA00463 m LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system
GRAS AA004710 m LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system

GRAS Sound & Vibration reserves the right to change accessories and specifications without notice.