Question
I have static pressure coefficient for my pcb® microphone preamplifier system but what is the static pressure limit? can this microphone operate at 40,000 feet?
Answers
The static pressure limit is the positive pressure limit on the diaphragm. At 40,000 ft. the ambient pressure is 21 kPa (vs. 99 kPa in Western NY). This is a pressure differential of 13.5 dB, but the microphone will only see this pressure if the altitude is changing faster than the microphone is venting. It is important to know what the rate of change in pressure the microphone will experience. PCB® recommends no more than 0.5 psi/s (3.5 kPa/s).   Your Comment




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