GRAS RA0252 1/4” 0.4cc High-Frequency

Acoustic Coupler

RA0252 is a standard 0.4cc acoustic cavity manufactured by GRAS Denmark (Axiometrix Solutions)

GRAS RA0113 1-inch 2cc

Reference Acoustic Coupler

RA0113 is a classic 2cc reference coupler manufactured by GRAS Denmark

GRAS RA0076 Thread Adapter for

RA0075 NBS 9A Coupler

GRAS RA0076 is a precision stainless steel thread adapter matched exclusively with the RA0075 NBS 9A Coupler

GRAS RA0075 NBS 9A 6cc

Acoustic Coupler

RA0075 is the classic NBS 9A 6cc reference coupler by GRAS Denmark

GRAS RA0057 High-Leak

Pinna Simulator

RA0057 is a standardized high-leak simplified pinna simulator manufactured by GRAS Denmark

GRAS RA0056 Low-Leak

Pinna Simulator

RA0056 is a low-leak pinna simulator manufactured by GRAS Denmark

GRAS RA0039 Sealed

Pinna Adapter

RA0039 is a fully sealed pinna adapter developed by GRAS exclusively for circumaural and supra-aural communication headsets

GRAS RA0038 1/2 inch 2cc Standard Acoustic Coupler

GRAS RA0045-S6 High-Sensitivity Prepolarized Ear Simulator

Prepolarized Ear Simulator

RA0045-S6 is the high-sensitivity prepolarized variant of GRAS standard 711 occluded ear simulator per IEC 60318-4

GRAS RA0045-S1 Standard-Sensitivity Prepolarized Ear Simulator

Prepolarized Ear Simulator

RA0045-S1 is the mass-production mainstream 711 occluded ear simulator per IEC 60318-4 from GRAS Denmark

GRAS 44AB Mouth Simulator Complying

with ITU-T Rec. P.51

44AB is a standardized mouth simulator manufactured by GRAS Denmark

GRAS 44AA Mouth Simulator with

Built-In 10 dB Power Amplifier

44AA is a human speech sound source developed by GRAS Denmark complying with global telecom standard ITU-T P.51

GRAS RA0045-S5 High-Pressure Externally Polarized

Ear Simulator with 1/4” Microphone

RA0045-S5 is a high-pressure externally polarized variant of GRAS standard 711 occluded ear simulator complying with IEC 60318-4

GRAS RA0045-S4 Externally Polarized

High-Sensitivity Ear Simulator

RA0045-S4 is a high-sensitivity externally polarized variant of GRAS standard IEC 60318-4 711 occluded ear simulator

GRAS RA0045 Standard-Sensitivity

Externally Polarized Ear Simulator

RA0045 is the base reference model of GRAS standard 711 occluded ear simulator complying with IEC 60318-4 (former IEC 60711)