Microphone inside a container/wrapper...

Thread Starter

Externet

Joined Nov 29, 2005
1,546
Hi.
Must protect a MEMS microphone from water splashes, by placing it in a sealed container.
What durable material enclosure would you suggest to get better acoustic impedance matching air-to-material-to air with hopefully the least attenuation ?
Acrylic - silicone - metal - polyethylene - vinyl - cellophane - aluminium foil - mylar - kapton... others ?
Of course will be as thin walled as able to find. -Voice range-
 

ian field

Joined Oct 27, 2012
6,539
Hi.
Must protect a MEMS microphone from water splashes, by placing it in a sealed container.
What durable material enclosure would you suggest to get better acoustic impedance matching air-to-material-to air with hopefully the least attenuation ?
Acrylic - silicone - metal - polyethylene - vinyl - cellophane - aluminium foil - mylar - kapton... others ?
Of course will be as thin walled as able to find. -Voice range-
The cheapest & easiest is a rubber johnny.
 

Thread Starter

Externet

Joined Nov 29, 2005
1,546
Thanks. Durability is of main concern... party balloons, latex, are short lived. Aiming for years weather proof. :(
 

djsfantasi

Joined Apr 11, 2010
6,956
Experiment. The least attenuation is somewhat vague. May be affected by other constraints. How much attenuation is too much?

Could you use a liquid form of latex or small latex patches as a sacrificial mask over any openings, followed by an epoxy dip to encapsulate and protect?
 

ian field

Joined Oct 27, 2012
6,539
Thanks. Durability is of main concern... party balloons, latex, are short lived. Aiming for years weather proof. :(
Cling film would last years as long as there's no abrasion.

Mylar is probably a good choice for thin enough for minimal attenuation and still take the knocks.
 
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