Check the listing for details. B & K Sound Intensity Calibrator — Type 3541. Condition: Used. Listed at 3250.00 USD. Type 3541 enables calibration of sound intensity measuring instruments by using a coupler designed especially for sound intensity calibrations. Intensity-probe microphones are positioned in the coupler, which in conjunction with a pistonphone simulates a plane sound wave propagating along the axis of the probe. USE SCENARIOSSound intensity and particle velocity calibrationsSound pressure calibrationMeasurement of pressure-residual intensity index at 250Hz The instrument’s sensitivity to both sound intensity and particle velocity can then be calibrated. The pistonphone can also be used for sound pressure calibrations. In addition to calibration, Type 3541 can be used to measure the pressure-residual intensity index spectrum of instruments used for measuring sound intensity at 250Hz. The main components of Type 3541 are the Intensity Coupler and Pistonphone. Components are : Intensity Coupler UA 0914Pistophone 4220Sound Source ZI 0055 Dummy Microphone UC 5298Two cablesTwo 1/4" Microphone AdaptorsMicrophone Adaptors for Pistonphone (1/2", 1/4" and 1/8"). Two Micro/BNC adaptorsIntensity Coupler Base-PlateCorrection Barometer (defect), Calibration Charts are stored in the lid. Device is 100% working (execpt the barometer) and is complete.I will remove the battery's when sending the package.