The GRAS RA0038 Coupler is a standard 2 cm³ Coupler according to IEC 126 and ANSI S3.7-1973. It uses a ½" microphone (preferably the GRAS 40AG) with a suitable preamplifier (e.g. GRAS 26AC which is a ¼" preamplifier but is supplied with an adapter for ½" microphones).

GRAS RA0038 耦合器是符合IEC 126和ANSI S3.7-1973 标准的2 cm³耦合器。 它使用½”传声器（最好是 GRAS 40AG）和合适的前置放大器（例如 GRAS 26AC ，它是¼”前置放大器，但配有½”传声器适配器）。 The RA0038 is for use in the acoustical measurements of insert type hearing aids and earphones. It complies with the requirements of. ANSI S3.7-1995 American National Standard for Coupler Calibration of Earphones.

The GRAS RA0038 Coupler is a standard 2 cm³ Coupler according to IEC 126 and ANSI S3.7-1973. It uses a ½" microphone (preferably the GRAS 40AG) with a suitable preamplifier (e.g. GRAS 26AC which is a ¼" preamplifier but is supplied with an adapter for ½" microphones). GRAS RA0038 1/2'' 2cc Coupler according to IEC 60318-5

GRAS is a worldwide leader in the sound and vibration industry. We develop and manufacture state-of-the-art measurement microphones and related equipment for industries where acoustic measuring accuracy and repeatability are of the utmost importance.

The GRAS RA0113 is a 2cc IEC 60126 coupler which uses a 1" microphone, e.g. the GRAS 40EN. The microphone, without its protection grid, screws into the base of the RA0113. In all other respects, this coupler is equivalent to the GRAS RA0038 .

The RA0038 IEC 126 Coupler is a 2 cm3 coupler which uses a 1⁄2” microphone, e.g. the G.R.A.S. 40AG. There is no need to remove the microphone’s protection grid and expose the microphone to accidental damage.

GRAS RA0038 1/2“2cc耦合器符合IEC 60318-5标准. 体积：2 cc. ANSI：S3.7. IEC：60318-5. 特殊功能：适用于1/2“压力话筒. 技术. RA0038用于插入式助听器和耳机的声学测量。 它符合要求. IEC 60318-5（60126）2 cm 3耦合器，用于测量通过耳塞和耳塞耦合到耳朵的助听器和耳机. ANSI S3.7-1995美国国家耳机耦合器校准标准。 为避免可能损坏麦克风，RA0038可与配备其保护网格的麦克风配合使用，例如GRAS 40AG和合适的前置放大器，如GRAS 26AS，它是1/4英寸非 …

GRAS测量麦克风与测试耦合器比较特殊，可以是符合IEC 60118-5（或ANSI S3.7）标准的2cc耦合器GRAS RA0038（下图1），也可以是符合IEC 60118-4标准的密闭式仿真耳GRAS RA0045（下图2）。 使用2cc耦合器时，还需要准备压力场测试麦克风GRAS 46AO-S2，而密闭式仿真耳通常自带内置的压力场麦克风。 2cc耦合器GRAS RA0038. 仿真耳GRAS RA0045. 关于ANSI S3.7中提到针对不同类型的助听器，2cc耦合器还会分为HA-1和HA-2两种，这部分应该如 …

The GRAS RA0038 Coupler is a standard 2 cm³ Coupler according to IEC 126 and ANSI S3.7-1973. It uses a ½" microphone (preferably the GRAS 40AG) with a suitable preamplifier (e.g. GRAS 26AC which is a ¼" preamplifier but is supplied with an adapter for ½" microphones). GRAS RA0038 1/2'' 2cc Coupler according to IEC 60318-5

Includes GRAS RA0038 IEC 60318-5 (60126) 2-cm³ Coupler, GRAS 40AG ½" Pressure Microphone, GRAS 26AC ¼" Preamplifier, GRAS RA0052 Test Jig, and studs and moulds for BTE and ITE instruments. The Test Jig has an adjustable spring-loaded arm to exert a variable force on the test object.