The Configurations
For your convenience, we have made 45CC available in a number of configurations to suit specific testing needs. Each configuration comes with the mounting needed to incorporate the optional mouth simulator for testing headsets.
The configurations are:
Basic 2-channel acoustic headphone and headset test fixture for basic tests where no acoustic loading is needed
Flush-mounted ½″ microphones: Excellent for scenarios such as quick turnaround prototype refinement
45CC-1 with Externally Polarized ½″ Microphones
45CC-2 with Prepolarized ½″ Microphones
GRAS 45CC test fixtures configured with ½″ externally polarized or prepolarized microphones that are primarily intended as tools for Quality Control and Production Line testing of headphones.
Basic 2-channel acoustic headphone and headset test fixture for basic tests where no acoustic loading is needed but where frequencies above 20 kHz (up to 70 kHz) are also of interest
Flush-mounted ¼″ microphones: Ideal for quick prototype refinement of hi-res on- or around-ear headphones.
45CC-9 with Externally Polarized ¼″ Microphones
45CC-10 with Prepolarized ¼″ Microphones
GRAS 45CC Headphone Test Fixtures configured with ¼″ externally polarized or prepolarized microphones extend the frequency range to 70 kHz for high-frequency testing.
2-channel acoustic headphone and headset test fixture with artificial ear simulators for test scenarios that require acoustic loading and adherence with IEC 60318-1
Ear simulators and ½″ microphones: Designed for testing on-ear and around-ear headphones in environments that require a highly durable ear simulator
45CC-3 with IEC 60318-1 Ear Simulators and Ext. Polarized ½″ Microphones
45CC-4 with IEC 60318-1 Ear Simulators and Prepolarized ½″ Microphones
GRAS 45CC Headphone Test Fixture configurations with IEC60318-1 ear simulators and ½″ externally polarized or prepolarized microphones are primarily intended as tools for Quality Control, Production Engineering and Production Line headphone testing. When testing according to IEC 60318-1 the acoustical load from an ear simulator is required.
Human-like 2-channel acoustic headphone and headset test fixture with ear simulators and realistic pinnae for test scenarios that require acoustic loading and adherence with IEC60318-4
Pinnae and ear simulators: Designed for testing any headphone type, including in-ear and inserts, requiring realistic human acoustic loading and ear geometry
45CC-14 with IEC 60318-4 Ear Simulators, Pinnae and Ext. Polarized Microphones
45CC-15 with IEC 60318-4 Ear Simulators, Pinnae and Prepolarized Microphones
GRAS 45CC Headphone Test Fixture configurations with IEC60318-4 ear simulators and realistic pinnae with accurate ear geometry are available with externally polarized or prepolarized microphones. They are primarily intended as tools for Quality Control and Production Engineering when testing according to IEC 60318-4 the acoustical load from an ear simulator is required. These configurations can be used to test any style of headphone or headset (with the optional GRAS 44AA-1 or 44AB-1 Mouth Simulator), including in-ear and insert earphones.
Human-like high-frequency 2-channel acoustic headphone and headset test fixture with ear simulators and realistic pinnae for test scenarios that require acoustic loading and adherence with IEC60318-4 at higher frequencies
Pinnae and ear simulators: Designed for high-frequency testing of any headphone type, including in-ear and inserts, requiring realistic human acoustic loading and ear geometry
45CC-16 with High-frequency IEC 60318-4 Ear Simulators, Pinnae and Ext. Polarized Microphones
45CC-17 with High-frequency IEC 60318-4 Ear Simulators, Pinnae and Prepolarized Microphones
GRAS 45CC Headphone Test Fixture configurations with IEC60318-4 ear simulators and realistic pinnae with accurate ear geometry are available with externally polarized or prepolarized microphones. They are primarily intended as tools for Quality Control and Production Engineering when testing according to IEC 60318-4 the acoustical load from an ear simulator is required. These configurations can be used to test any style of headphone or headset (with the optional GRAS 44AA-1 or 44AB-1 Mouth Simulator), including in-ear and insert earphones.
Human-like high-resolution 2-channel acoustic headphone and headset test fixture with ear simulators and realistic pinnae for test scenarios that require acoustic loading and adherence with IEC60318-4 at higher resolutions
Pinnae and ear simulators: Designed for high-resolution testing of any headphone type, including in-ear and inserts, requiring realistic human acoustic loading and ear geometry
45CC-18 with High-resolution IEC 60318-4 Ear Simulators, Pinnae and Ext. Polarized Microphones
45CC-19 with High-resolution IEC 60318-4 Ear Simulators, Pinnae and Prepolarized Microphones
GRAS 45CC Headphone Test Fixture configurations with IEC60318-4 ear simulators and realistic pinnae with accurate ear geometry are available with externally polarized or prepolarized microphones. They are primarily intended as tools for Quality Control and Production Engineering when testing according to IEC 60318-4 the acoustical load from an ear simulator is required. These configurations can be used to test any style of headphone or headset (with the optional GRAS 44AA-1 or 44AB-1 Mouth Simulator), including in-ear and insert earphones.
Warranty
GRAS offers a five-year warranty against defective materials and workmanship.
Service
If you accidentally damage the diaphragm on a GRAS microphone, we can - in most cases - replace it at a very reasonable cost and with a short turn-around time. This not only protects your investment but also pleases your quality assurance department because you don’t have to worry about new serial numbers, etc.
Calibration
Before leaving the factory, all GRAS microphones are calibrated in a controlled laboratory environment using traceable calibration equipment.
Depending on the use, measurement environment, and internal quality control programs, we recommend recalibrating the microphone at least once a year.
