Microphone Basics

[@jjx-v7b]

I have a question that I would like to ask. When conducting acoustic tests on vehicles, if the microphones have been calibrated before the testing, is it necessary to recalibrate them again on the following day or in the subsequent days, especially in high-temperature or high-altitude regions?
I'm looking forward to your response, thank you.

[@SimcenterTesting]

For microphones, it is a common practice to calibrate daily. This is because temperature and humidity can change the speed of sound which affects the calibration. So to account for these potential differences calibration is typically done daily.

[@jjx-v7b]

@@SimcenterTesting ok，thanks

[@milindaweerasinghe8064]

thanks very much!