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
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. 

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

I accept to be contacted regarding my request. I also consent to receive any updates of the data in question. We log data to send you an email with links to the documents requested and provide you with future updates of the data in question.