For pistonphones

This precision barometer has an LCD which can display (toggle button) either the static-pressure correction (e.g. -0.13 dB) for a pistonphone or the ambient static pressure (e.g. 997 hPa). This product is intended as optional accessory for pistonphones which as standard has an analogue barometer in..

This is a pistonphone adapter for sensitivity calibration of our precision 1/4" surface microphone sets. The adapter is designed for laboratory calibration and can also be used for in-situ verification...

This is a pistonphone adapter which is designed for field verification of the 1/2" flush-mount microphone included in GRAS 67AX/67AD Ground Array Microphone kits...