Re: Foam rot in AT3528

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I HAVE HAD GOOD RESLTS CUTING FOME WITH ELECTRIK CARVING KNIFE and stitching to gether the end’s with fine sowing thread and then turning the fome tube incideout???? ??This teck-neek is good to make a wind sock to fit over the out cede of the mick ?and is cost effive and doesn’t need to be soaked with water ????

PS foam cut this way makes the building of microphone transporting boxes easy? kind regards Stephen Muir-Field ?

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From: Dibutil Ftalat
Sent: 08 April 2022 15:19
To: [email protected]
Subject: Re: [MicBuilders] Foam rot in AT3528

The foam besides dimensions has the following characteristics:
- density
- size of cell
- % open cell
- Young’s modulus of the foam
- Young’s modulus of the material
- acoustical Q-factor

If you match all of the above you _may_ recover the original acoustic properties of the mic. If not, then adding any foam is as good or worse than leaving it without any foam at all.?

Hint: open-cell foam is best cut with razor-sharp blade ?when the foam is fully soaked with water or, better yet, fully submerged in it.?

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