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

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 an angled adapter for the preamplifier, and therefore can be used in binaural setups inside a KEMAR (45BB and 45BC) or a GRAS 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.

 

Specifications

Connector type
3 m 7-pin LEMO
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
CE/RoHS compliant/WEEE registered
Yes/Yes/Yes
Specification Conditions

GRAS 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 

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 3 m 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 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

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

 

Get Quote