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-

 

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.

 

Thanks. Durability is of main concern... party balloons, latex, are short lived. Aiming for years weather proof.

 

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?

 

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.

 

The cheapest & easiest is a rubber johnny.

Yep, the usual means of waterproofing a microphone with negligible effects on the sound.