G.R.A.S. 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
/

Introduction

The G.R.A.S. 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 an angled adapter for the preamplifier, and therefore can be used in binaural setups inside a KEMAR (45BB and 45BC) or a G.R.A.S. 45CA Hearing-Protector Test Fixture.

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.

 

Connector type 3 m 7-pin LEMO
Theoretical dynamic range lower limit with G.R.A.S. preamplifier dB(A) 10.5
Theoretical dynamic range upper limit with G.R.A.S. preamplifier @ +28 V / ±14 V power supply dB 113
Coupler volume 1260 @ 500 Hz
CE/RoHS compliant/WEEE registered Yes/Yes/Yes

G.R.A.S. Sound & Vibration reserves the right to change specifications without notice.

 

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 

G.R.A.S. Sound & Vibration reserves the right to change specifications and accessories without notice.

Included Items

G.R.A.S. RA0234

Low-noise Ear Simulator

G.R.A.S. 40AH

1/2" Ext. Polarized Pressure Microphone, High Sensitivity

G.R.A.S. 26HG

1/4" Preamplifier with 3 m Integrated Cable

G.R.A.S. 26HT

Gain and Filter Unit for 40HT

G.R.A.S. 12HF

1-Channel Power Module for Low-noise Systems

 

Accessories

G.R.A.S. 42AA

Pistonphone, Class 1

G.R.A.S. 42AP

Intelligent Pistonphone, Class 0

G.R.A.S. RA0090

94 dB Pistonphone Coupler

G.R.A.S. RA0237

Straight Ear Canal Extension Kit for KEMAR

G.R.A.S. RA0172

Pinna Holder Kit

G.R.A.S. AA0046

3 m LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system

G.R.A.S. AA0047

10 m LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system

G.R.A.S. AA0053-CL

Customized length LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system. CLXXXX= Cable length in centimeters to be specified by customer

G.R.A.S. Sound & Vibration reserves the right to change accessories without notice.

G.R.A.S. Sound & Vibration reserves the right to change specifications and accessories without notice.