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Old April 16th, 2005, 10:51 AM   #1
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Mic Damage Possibility?

I know that a powered mic can easily be damaged from too much acoustical pressure when in use. But, can the same be said when the mic is unpluged-non-powered sitting on the table.

Nothing has happened yet, just need to know if I should be cautious in this case.

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Old April 16th, 2005, 11:59 AM   #2
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Similar question here. What about a gunshot? Would that be loud enough to damage a mic?
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Old April 16th, 2005, 12:15 PM   #3
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Actually, physics dictates that the mic is safer from excessive displacement of its moving parts when the power is on.

And most mic specs that I've read indicated that the mic could not only tolerate SPL's well above what the human ear can tolerate, but it could operate without distortion!

It's hard for me to imagine anything less than an explosive shock wave damaging a microphone, powered or unpowered, and I've yet to hear of it happening.
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Old April 16th, 2005, 01:03 PM   #4
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<<<-- Originally posted by Marco Leavitt : Similar question here. What about a gunshot? Would that be loud enough to damage a mic? -->>>

I've seen responsible reports (e.g., a Ball State University researcher) on a wide variety of pistols and shotguns that place the measured SPLs no higher than about 165 dB. If the diaphram of a small diaphram condenser mic is about 1 centimeter in diameter it will sustain a peak impulse force of 0.28 Newtons (about 1.1 ounces) at worst from the sound of a gunshot. 1.1 ounces on one square centimeter is probably about the breaking strength of wet tissue paper.

How much weight could be evenly placed on a small diaprham condenser mic's diaphram without damaging it? I don't know, but if it's not well over 1.1 ounces, I'd be very surprised.

So personally, I wouldn't fear for my mics whatsoever around gunshots.
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