The Larson Davis Model
CAL150 is a precise microphone calibrator intended for the 3/8"
diameter microphones typically used on the, SoundTrack Lxt class 2, Model 700, 710, 712, and
720 SLM/Dosimeters and the Model 705 Noise Badge. The CAL150
provides a choice of calibration sound pressure levels, 94.0 and
114.0 dB (switch selectable) at a frequency of 1 kHz. The optional
adaptor ADP024 is available to permit reference measurements of the
CAL150 to be made using the Larson Davis Models 2520 1/4" condenser