Use a handheld acoustic calibrator (also known as a sound level calibrator) to produce a known sound pressure level at a known frequency. This level can then be used to adjust your sound measuring equipment to measure more accurately, since microphone performance can vary with weather conditions. This process, commonly known as field calibration or acoustic calibration, is typically performed both before and after every measurement. Larson Davis also offers a range of calibrator adapters for different sized microphones. Please contact us for more information.

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Model Class (type) Output Level Frequency Maximum Diameter
CAL1250 Photo of CAL1250 calibrator 1 94 dB or 114 dB selectable 251.2 Hz or 1000 Hz selectable 1"
CAL1200 Photo of CAL1200 calibrator 1 94 dB or 114 dB selectable 1000 Hz selectable 1/2"
CAL1150 Photo of CAL1150 calibrator 1 94 dB or 114 dB selectable 251.2 Hz or 1000 Hz selectable 1/2"
CAL250 Photo of CAL250 calibrator 1 114 dB 251.2 Hz 1"
CAL200 Photo of CAL200 calibrator 1 94 dB or 114 dB selectable 1000 Hz 1/2"
CAL150 Photo of CAL150 calibrator 2 94 dB or 114 dB selectable 1000 Hz 1/2"