Danish GRAS supplier GRAS 45CA earphones imported with original packaging

Our advantages

Our company has a permanent office in Bremen, Germany and has established long-term friendly cooperation with GRAS manufacturers in Denmark. We strongly support our comprehensive sales company in China. We import directly from abroad, handle customs clearance independently, and control costs to a large extent. We provide high-quality and low-priced products to domestic enterprises, research institutes, universities, and other laboratories. We can also provide product customs declaration forms, short delivery times, and express delivery. We welcome inquiries and orders from major domestic enterprises and intermediaries!

Product Introduction

GRAS 45CA provides the foundation for reliable and accurate measurements and is designed for

• A testing fixture installed on an elastic base that can minimize background noise under typical testing conditions.Provide foam plug and grease to avoid sound leakage along the cable

• Test fixture head, used to optimize sound insulation effect

• Soundproof cup and plug, used to test the sound insulation effect

• Can install a series of KEMAR molded rubber earrings, such as for testing earplugs

The robust design of 45CA is highly suitable for binaural testing of active and passive earplugs, as well as ring ear hearing protectors.

It is mainly used to test the performance of hearing protection devices, such as earplugs and earmuffs (in ear and ring ear), but can also be used to test sound sources, such as headphones and headsets.It is equipped with a microphone or ear simulator, depending on the device to be tested and the standards to be followed.

Following ISO 4869-3, IEC 60318-1, and IEC 60318-4 ensures repeatability and transparency of data for technicians, decision-makers, and institutions in the development and validation of hearing protectors.

The 45CA earrings are the same as the standard KEMAR earrings, but rounded to fit the large 45CA base plate.This large bottom plate reduces or eliminates the risk of leakage.

The 45CA includes two plugs for measuring sound isolation in closed ears.

We suggest that you do it before each useCalibration to ensure measurement accuracy.shouldIntelligent piston sound orPiston sound is very suitable for this task.

Product Features

The 45CA headphone/hearing protector testing device (not configured) is a multifunctional testing platform that you can configure to meet specific needs.You can order fully assembled, calibrated, and tested drunk common configurations from GRAS. These are:

45CA-1 Earphone/Hearing Protector Testing Device, ISO 4869-3 1 "Microphone, LEMO

45CA-1 is used to test the configuration of in ear devices, that is, to measure the insertion loss of earmuffs and the sound quality of headphones.In this configuration, the 45CA is equipped with two GRAS 40EN 1 "pressure microphones. This configuration complies with ISO 4869-3.

45CA-2 Earphone/Hearing Protector Testing Device, ISO 4869-3 1/2 "Microphone CCP

45CA-2 is used to test the configuration of in ear devices, that is, to measure the insertion loss of earmuffs and the sound quality of headphones.In this configuration, the 45CA is equipped with two GRAS 40AD 1/2 "pressure microphones. This configuration complies with ISO 4869-3

45CA-3 headphone/hearing protector testing device, IEC 60318-1 LEMO

The 45CA-3 is configured for measuring the insertion loss of ring ear hearing protectors and the sound quality of headphones, with two RA0039 ear simulators equipped with 40AG 1/2 "externally polarized microphones. This configuration complies with IEC 60318-1. RA0039 cannot be used in conjunction with the Pinna simulator, therefore it cannot be used for measuring in ear headphones.

45CA-4 headphone/hearing protector testing device, IEC 60318-1 CCP

The 45CA-4 is equipped with two RA0039 ear simulators with 40AO 1/2 "pre polarized microphones. This configuration complies with IEC 60318-1 and is used to measure the insertion loss of earring type hearing protectors and the sound quality of headphones. RA0039 cannot be used with the Pinna simulator, therefore it cannot be used for measuring in ear headphones.

45CA-5 headphone/hearing protector testing device, IEC 60318-4 LEMO

The 45CA-5 is equipped with the RA0045 external polarization ear simulator, which can be used together with the Pinna simulator.It can be used to measure the insertion loss of earmuffs and earplugs, as well as the sound quality of headphones and headsets.This configuration complies with IEC 60318-4.

45CA-6 headphone/hearing protector testing device, IEC 60318-4 CCP

The 45CA-6 is equipped with the RA0045-S1 pre polarized ear simulator, which can be used together with the Pinnacle simulator.This configuration can be used to measure the insertion loss of earmuffs, as well as the sound quality of headphones and hearing aids.This configuration complies with IEC 60318-4.

45CA-7 headphone/hearing protector testing device, IEC 60318-4 LEMO， Equipped with ergonomic pins

The 45CA-7 is equipped with a RA0045 external polarization ear simulator and a human anatomy auricle.It can be used to measure the insertion loss of earmuffs and earplugs, as well as the sound quality of headphones and headsets.This configuration complies with IEC 60318-4.

45CA-8 headphone/hearing protector testing device, IEC 60318-4 CCP， Equipped with ergonomic pins

The 45CA-8 is equipped with a RA0045-S1 pre polarized ear simulator and a human anatomy auricle.This configuration can be used to measure the insertion loss of earmuffs, as well as the sound quality of headphones and hearing aids.This configuration complies with IEC 60318-4.

45CA-9 headphone/hearing protector testing device, high-frequency ear simulator, and ergonomic Pinnae, LEMO

The 45CA-9 is equipped with a RA0401 external polarization high-frequency ear simulator and a human anatomy auricle.It can be used to measure hearing aids, headphones, and headsets up to 20 kHz.This configuration complies with IEC 60318-4.

45CA-10 headphone/hearing protector testing device, high-frequency ear simulator, and ergonomic Pinnae, CCP

The 45CA-10 is equipped with a RA0402 pre polarized ear simulator and a human measurement ear canal.It can be used to measure hearing aids, headphones, and headsets up to 20 kHz.This configuration complies with IEC 60318-4.

45CA-11 headphone/hearing protector testing device, high-resolution ear simulator, and ergonomic Pinnae, LEMO

The 45CA-11 is equipped with a RA0403 external polarization high-resolution ear simulator and a human anatomy auricle.It can be used to measure hearing aids, headphones, and headsets up to 50 kHz.This configuration is compatible with IEC 60318-4.

45CA-12 Earphone/Hearing Protector Test Fixture, High Resolution Ear Simulator and Anthropological Pinnae, CCP

The 45CA-12 is equipped with a high-resolution ear simulator with RA0404 pre polarization and an ear canal for human anatomy.It can be used to measure hearing aids, headphones, and headsets up to 50 kHz.This configuration is compatible with IEC 60318-4.

The "Order Information" tab listsEach configuration has an application specific project.

Ordering Information

Danish GRAS supplier GRAS 45CA earphones imported with original packaging