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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 a prepolarized ICP® microphone be used with an externally polarized preamplifier and power supply?

Yes, a prepolarized ICP® microphone can be used with a preamplifier and power supply designed for externally polarized microphones. Since a 200V power source is not required for the prepolarized microphone the power supply should be switched to 0V. The microphone will not be harmed if the 200V polarization is selected. This externally polarized set-up with a prepolarized mic is sometimes desired to get a little higher amplitude range, since preamplifiers for the 200V models typically provide a higher output voltage rating (14V vs 8V, peak to peak.) It may also be desired to save on the system costs, when you already have the power supply and preamplifier and just need the prepolarized microphone.

Can a prepolarized ICP® microphone be used with an externally polarized preamplifier and power supply?

Yes, a prepolarized ICP® microphone can be used with a preamplifier and power supply designed for externally polarized microphones. Since a 200V power source is not required for the prepolarized microphone the power supply should be switched to 0V. The microphone will not be harmed if the 200V polarization is selected. This externally polarized set-up with a prepolarized mic is sometimes desired to get a little higher amplitude range, since preamplifiers for the 200V models typically provide a higher output voltage rating (14V vs 8V, peak to peak.) It may also be desired to save on the system costs, when you already have the power supply and preamplifier and just need the prepolarized microphone.