Description

For calibrating SoundTrap ST600 / ST400 / ST300 using a sound calibrator or pistonphone.

Verified to work with the GRAS 42 AG sound calibrator and GRAS 42AA pistonphone with 1″ adapter. May also work with other 1″ pistonphones/calibrators.

Note that the coupler’s internal volume is not standard, meaning the applied sound pressure may vary from nominal pistonphone output.  See the calibration section of the ST600/ST400 user guide for details.