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Microphones and Acoustics

Frequently Asked Questions

Get your most commonly asked acoustics questions answered.

Section I: Definitions and Terminology
Section II: Microphone Recommendations
Section III: Calibration and Testing
Section IV: Specification Clarifications
Section V: Specialty Microphone Applications
Section VI: Maintenance and Handling

If you don’t see the answer to your question, call our 24/7 SensorLineSM 716-684-0001 to speak with an application engineer or visit Ask the Acoustics Experts.

Can I calibrate PCB® model 378A04 low noise microphone with any handheld calibrator?

PCB®  model 378A04 is a specialty microphone used to measure extreme low noise. To accomplish this, it has a very high sensitivity. A result of this high sensitivity is that the 3% distortion level is lower than some handheld calibrators and pistonphones output levels and will overload the microphone. A calibrated reference source needs to be used that cannot exceed 100 dB and must be below 5kHz. The CAL200 calibrator with a reference signal of 94 dB at 1 kHz is recommended for model 378A04 calibration.

Can I calibrate PCB® model 378A04 low noise microphone with any handheld calibrator?

PCB®  model 378A04 is a specialty microphone used to measure extreme low noise. To accomplish this, it has a very high sensitivity. A result of this high sensitivity is that the 3% distortion level is lower than some handheld calibrators and pistonphones output levels and will overload the microphone. A calibrated reference source needs to be used that cannot exceed 100 dB and must be below 5kHz. The CAL200 calibrator with a reference signal of 94 dB at 1 kHz is recommended for model 378A04 calibration.