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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

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What is the difference between absolute phase and relative phase for condenser microphones?

Phase represents the delay between an applied force (electrical or mechanical) and the response to the applied force (electrical or mechanical).  This is characterized as absolute phase or relative phase.  Absolute phase is the intrinsic phase delay of the microphone and is independent of any external references. It represents the delay between the incident pressure and the output electrical response.  Relative phase is the delay between the output electrical response and the response of another microphone.  Any relative phase measurement must be established against a standard. 

What is the difference between absolute phase and relative phase for condenser microphones?

Phase represents the delay between an applied force (electrical or mechanical) and the response to the applied force (electrical or mechanical).  This is characterized as absolute phase or relative phase.  Absolute phase is the intrinsic phase delay of the microphone and is independent of any external references. It represents the delay between the incident pressure and the output electrical response.  Relative phase is the delay between the output electrical response and the response of another microphone.  Any relative phase measurement must be established against a standard.