G.R.A.S. 45CC Headphone Test Fixture

Precise support for all headphone sizes
High quality measurement microphones, 1/2" or 1/4"
IEC 60318-1 ear simulators
ITU-T Rec. P51 mouth simulator
Easy in-situ calibration

Introduction

The 45CC Headphone Test Fixture is for dual-channel testing of headphones and headsets, and it is built on our vast experience in the field. With a focus on multiple configuration options and accurate and repeatable test results, the test fixture can easily be adapted to many different headphone/headset designs and sizes.

Main features

  • Dual-channel testing of headphones and headsets
  • Multiple configuration options: microphones or IEC 60318-1 ear simulators - with or without a mouth simulator
  • Distance between ears adjustable from 130 to 170 mm
  • Headband holder height adjustable from 75 to 135 mm
  • Reproducible positioning of DUT using 45CC’s unique positioning guides
  • High quality measurement microphones
  • IEC 60318-1 ear simulators
  • ITU-T Rec. P51 mouth simulator with built-in power amplifier
  • The microphones are mounted with snap fittings for easy calibration

All adjustments to headband position and height as well as the distance between the ear plates can be done quickly and very accurately. Precise scales make it easy to document all settings accurately, be it the headband position, the width between ears, or the position of the positioning guide. Therefore it is easy to set up other 45CCs to mirror the original setup.

Once the test fixture has been adjusted to fit a certain headphone, the design of headband holder, ear plates and the unique positioning system ensures that when testing identical headphones you will get the same positioning and fit from one test to the next. Therefore repeatability in a production line testing environment will be second to none with the 45CC. This makes the 45CC the unrivalled choice for demanding QC and PL applications.

See also the brochure for 45CC.

The Configurations

For your convenience, we have made 45CC available in 8 different pre-configurations. These are:

1/2" Microphones

45CC-1 with Externally Polarized 1/2" Microphones
45CC-2 with Prepolarized 1/2" Microphones

G.R.A.S. 45CC Headphone Test Fixture configured with 1/2" externally polarized or prepolarized microphones is primarily intended as a tool for QC and PL testing of headphones. Except for the mounting of the ear plate assemblies, 45CC comes fully assembled and tested from the factory.

Ear Simulators and 1/2" Microphones

45CC-3 with IEC 60318-1 Ear Simulators and Ext. Polarized 1/2" Microphones
45CC-4 with IEC 60318-1 Ear Simulators and Prepolarized 1/2" Microphones

G.R.A.S. 45CC Headphone Test Fixture configured with IEC60318-1 ear simulators and 1/2" externally polarized or prepolarized microphones is primarily intended as a tool for QC and PL testing of headphones. Where the acoustical load from an ear simulator is required, the use of the IEC 60318-1 ear simulators also mean that testing according to IEC 60318-1 and ITU-T Recommendations P.57 is possible. Except for the mounting of the ear plate assemblies, 45CC comes fully assembled and tested from the factory.

Mouth Simulator and 1/2" Microphones

45CC-5 with Mouth Simulator and Ext. Polarized 1/2" Microphones
45CC-6 with Mouth Simulator and Prepolarized 1/2" Microphones

G.R.A.S. 45CC Headphone Test Fixture configured with 1/2" externally polarized or prepolarized microphones and the G.R.A.S 44AA Mouth Simulator is primarily intended as a tool for QC and PL testing of communication headsets. Except for the mounting of the ear plate assemblies and the mouth simulator, 45CC comes fully assembled and tested from the factory.

Mouth Simulator and Ear Simulators 

45CC-7 with Mouth Simulator, IEC 60318-1 Ear Simulators and Ext. Polarized 1/2" Microphones
45CC-8 with Mouth Simulator, IEC 60318-1 Ear Simulators and Prepolarized 1/2" Microphones

G.R.A.S. 45CC Headphone Test Fixture configured with IEC60318-1 ear simulators, 1/2" externally polarized or prepolarized microphones and the G.R.A.S. 44AA Mouth Simulator is primarily intended as a tool for QC and PL testing of communication headsets. Where the acoustical load from an ear simulator is required, the use of the IEC 60318-1 ear simulators also mean that testing according to IEC 60318-1 and ITU-T Recommendations P.57 is possible. Except for the mounting of the ear plate assemblies and the mouth simulator, 45CC comes fully assembled and tested from the factory.

 

.

CE/RoHS compliant/WEEE registered yes/yes/yes

1/2" MICROPHONES

 

Sensitivity

12.5 mV/Pa

Frequency Response

3.15 Hz - 20 kHz

40AG (with 26AC preamp)

25 dB(A) - 164 dB

40AO (with 26CK preamp)

25 dB(A) - 150 dB

 

EAR SIMULATOR

 

RA0039

IEC 60318-1

MOUTH SIMULATOR

 

Maximum power, continuous

20 W

Gain

10 dB

Output impedance

8 Ω
Power supply 24 V DC

TEST FIXTURE

 

Width between ears

Adjustable from 130 to 170 mm

Height of headband holder

Adjustable from 75 to 135 mm

Horizontal position of headband holder

Adjustable +/- 5 mm

Ear plate angle

4.5° (ISO 4869-3)

Diameter of ear plate

128 mm

Positioning guides

Continuous adjustment of horizontal and vertical position. Two-point support for all headphone sizes

Weight

3 kg

 

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

 

Included items

45CC-1 - with Externally Polarized Microphones

45CC

Test fixture

G.R.A.S. 69CC-1

LEMO Pressure Mic. Set for 45CC, 2 pcs, comprising:

    G.R.A.S. 40AG

1/2" Ext. Polarized Pressure Microphone

    G.R.A.S. 26AC

Standard Preamplifier with 3 m Integrated Cable

    G.R.A.S. GR0010

Adapter for 1/4" preamplifier and 1/2" microphone

 

45CC-2 - with Prepolarized Microphones 

45CC

Test fixture

G.R.A.S. 69CC-2

CCP Pressure Mic. Set for 45CC, 2 pcs, comprising:

    G.R.A.S. 40AO

1/2" Prepolarized Pressure Microphone

    G.R.A.S. 26CK

1/2" CCP Preamplifier with Microdot Connector, Very Short

G.R.A.S. AA0070

3 m Microdot-BNC Cable, 2 pcs

 

45CC-3 with IEC 60318-1 Ear Simulators and Externally Polarized Microphones 

45CC

Test fixture

G.R.A.S. RA0039

IEC 60318-1 Ear Simulator, 2 pcs

G.R.A.S. 69CC-1

LEMO Pressure Mic. Set for 45CC, 2 pcs, comprising:

    G.R.A.S. 40AG

1/2" Ext. Polarized Pressure Microphone

    G.R.A.S. 26AC

Standard Preamplifier with 3 m Integrated Cable

    G.R.A.S. GR0010

Adapter for 1/4" preamplifier and 1/2" microphone

 

45CC-4 - with IEC 60318-1 Ear Simulators and Prepolarized Microphones

45CC

Test fixture

G.R.A.S. RA0039

IEC 60318-1 Ear Simulator, 2 pcs

G.R.A.S. 69CC-2

CCP Pressure Mic. Set for 45CC, 2 pcs, comprising:

    G.R.A.S. 40AO

1/2" Prepolarized Pressure Microphone

    G.R.A.S. 26CK

1/2" CCP Preamplifier with Microdot Connector, Very Short

G.R.A.S. AA0070

3 m Microdot-BNC Cable, 2 pcs

 

45CC-5 - with Mouth Simulator and Externally Polarized Microphones

45CC

Test fixture

G.R.A.S. 44AA

Mouth Simulator according to ITU-T Rec. P51 with built-in power amplifier

G.R.A.S. AA0035

BNC-BNC Cable

G.R.A.S. 69CC-1

LEMO Pressure Mic. Set for 45CC, 2 pcs, comprising:

    G.R.A.S. 40AG

1/2" Ext. Polarized Pressure Microphone

    G.R.A.S. 26AC

Standard Preamplifier with 3 m Integrated Cable

    G.R.A.S. GR0010

Adapter for 1/4" preamplifier and 1/2" microphone

 

45CC-6 - with Mouth Simulator and  Prepolarized Microphones 

45CC

Test fixture

G.R.A.S. 44AA

Mouth Simulator according to ITU-T Rec. P51 with built-in power amplifier

G.R.A.S. AA0035

BNC-BNC Cable

G.R.A.S. 69CC-2

CCP Pressure Mic. Set for 45CC, 2 pcs, comprising:

    G.R.A.S. 40AO

1/2" Prepolarized Pressure Microphone

    G.R.A.S. 26CK

1/2" CCP Preamplifier with Microdot Connector, Very Short

G.R.A.S. AA0070

3 m Microdot-BNC Cable, 2 pcs

 

45CC-7 with Mouth Simulator, IEC 60318-1 Ear Simulators and Externally Polarized Microphones

45CC

Test fixture

G.R.A.S. 44AA

Mouth Simulator according to ITU-T Rec. P51 with built-in power amplifier

G.R.A.S. AA0035

BNC-BNC Cable

G.R.A.S. RA0039

IEC 60318-1 Ear Simulator, 2 pcs

G.R.A.S. 69CC-1

LEMO Pressure Mic. Set for 45CC, 2 pcs, comprising:

    G.R.A.S. 40AG

1/2" Ext. Polarized Pressure Microphone

    G.R.A.S. 26AC

Standard Preamplifier with 3 m Integrated Cable

    G.R.A.S. GR0010

Adapter for 1/4" preamplifier and 1/2" microphone

 

45CC-8 with Mouth Simulator, IEC 60318-1 Ear Simulators and Prepolarized Microphones

45CC

Test fixture

G.R.A.S. 44AA

Mouth Simulator according to ITU-T Rec. P51 with built-in power amplifier

G.R.A.S. AA0035

BNC-BNC Cable

G.R.A.S. RA0039

IEC 60318-1 Ear Simulator, 2 pcs

G.R.A.S. 69CC-2

CCP Pressure Mic. Set for 45CC, 2 pcs, comprising:

    G.R.A.S. 40AO

1/2" Prepolarized Pressure Microphone

    G.R.A.S. 26CK

1/2" CCP Preamplifier with Microdot Connector, Very Short

G.R.A.S. AA0070

3 m Microdot-BNC Cable, 2 pcs

 

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