符合IEC 60318-5的GRAS RA0038 1/2英寸2cc耦合器

Volume: 2 cc
ANSI: S3.7
IEC: 60318-5
Special feature: For 1/2" pressure 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）。

Technology

The RA0038 is for use in the acoustical measurements of insert type hearing aids and earphones.

It complies with the requirements of

  • IEC 60318-5 (60126) 2 cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by ear inserts and
  • ANSI S3.7-1995 American National Standard for Coupler Calibration of Earphones.

To avoid possibly damaging the microphone, the RA0038 can be used with a microphone fitted with its protection grid, e.g. a GRAS 40AG and a suitable preamplifier, like GRAS 26AS which is a 1/4" very short preamplifier with 3 m integrated cable.

The RA0038 is also part of the GRAS 43AB Artificial Ear.

Specifications

Connector type
BNC
Polarization/Connection
0 V / CCP
Coupler volume
mm³
2 ccm
Humidity range non condensing
% RH
0 to 95
ANSI standard
S3.7
IEC standard
60318-5 (former 60126)
CE/RoHS compliant/WEEE registered
Yes/Yes, Yes
Weight
g / oz
50 / 1.76

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.