CAL150 Precision Acoustic Calibrator IEC 60942 Class 2 Handheld Sound Level Calibrator for ½” microphones at 1000 Hz Used for Sound Level Meters and Noise Dosimeters Highlights I Internal battery Output level independent of battery condition Adaptors: 1/4”, 3/8” microphones Applications Field calibration or laboratory calibration of: I Sound level meters Noise dosimeters Noise monitoring stations CAL150 Portable Sound Calibrator The Larson Davis CAL150 Sound Level Calibrator is a battery operated precision microphone calibrator used for the calibration of sound level meters and other sound measurement equipment. It can provide an output level of either 94.0 or 114.0 dB (switch-selectable) at a frequency of 1 kHz. It has been designed for both field and laboratory use and the accuracy has been calibrated to a reference traceable to the National Institute of Standards and Technology (NIST). The Larson Davis CAL150 features a stable sound pressure independent of the battery condition. In addition, the Larson Davis CAL150 will turn off automatically to preserve battery and guarantee a stable output. Larson Davis

Acoustic 114.0 dB and 94.0 dB ± 0.3 dB SPL re: 20µPa (114.0 dB is the principal sound pressure level) -0.12 dB for 1/2” microphones Calibration sound pressure level Equivalent free-field level Frequency Harmonic distortion Stability after pressing On Minimum stabilizing time 10 seconds after coupling microphone and calibrator 101.3 kPa, 23 ºC and 50 % RH. Temperature range SPL variation < ± 0.4 dB SPL variation < ± 0.6 dB Frequency variation < ± 7 Hz SPL variation < ± 0.5 dB Frequency variation < ± 7 Hz Storage temperature Storage humidity Humidity range For use with sound level meters and noise...