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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.

What is the maximum temperature that microphone and preamplifier system can withstand and how does the heat affect the application?

The operating temperature limits are usually supplied in the manufacturers specification sheets. A typical precision prepolarized microphone from PCB® will be guaranteed to operate up to 120o C. A typical externally polarized microphone will operate up to 150o C. The sensitivity may change slightly as the operating temperature changes. A reputable manufacturer will provide a temperature coefficient of sensitivity (example –0.007 dB/ oC.) The operating temperature for preamplifiers is usually the limiting factor. A typical preamplifier specification limits the operating temperature to 60oC to 80oC. High temperature preamplifier designs have been developed that meet 120 oC. Probe microphone designs allow for measurements to be made up to 800oC by performing the measurement at the end of the probe tip. The probe will allow the sound signals to pass through, while isolating the microphone and preamplifier in a separate housing away from the heat source.

What is the maximum temperature that microphone and preamplifier system can withstand and how does the heat affect the application?

The operating temperature limits are usually supplied in the manufacturers specification sheets. A typical precision prepolarized microphone from PCB® will be guaranteed to operate up to 120o C. A typical externally polarized microphone will operate up to 150o C. The sensitivity may change slightly as the operating temperature changes. A reputable manufacturer will provide a temperature coefficient of sensitivity (example –0.007 dB/ oC.) The operating temperature for preamplifiers is usually the limiting factor. A typical preamplifier specification limits the operating temperature to 60oC to 80oC. High temperature preamplifier designs have been developed that meet 120 oC. Probe microphone designs allow for measurements to be made up to 800oC by performing the measurement at the end of the probe tip. The probe will allow the sound signals to pass through, while isolating the microphone and preamplifier in a separate housing away from the heat source.