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Why Do The Pcb® Short Preamplifier Models, 426a07 And 426a13, Have 2 Vent Holes In Them? |
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Answer» Vent HOLES allow for equalization of the external pressure. This also impacts the LOW frequency specification. If the preamplifier vent hole gets COVERED or sealed, the microphone will not work properly. A microphone holder can block this vent. A short preamplifier has very LITTLE surface AREA to clamp onto, so there is a higher probability of blocking the vent. This is why a second vent hole on a different axis was added. Vent holes allow for equalization of the external pressure. This also impacts the low frequency specification. If the preamplifier vent hole gets covered or sealed, the microphone will not work properly. A microphone holder can block this vent. A short preamplifier has very little surface area to clamp onto, so there is a higher probability of blocking the vent. This is why a second vent hole on a different axis was added. |
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