The filter cavities have very bad audio pick up, most likely coupled through sound moving the flexture mounts/mirrors. In an attempt to mitigate this we've floated the idea of cavity earmuffs. This is the first iteration of it. The design fits well enough. A few issues on this first iteration:

-We should have it contacting the metallic section of the cavity to form a seal.

-A major oversight, this was designed with only the location pictured in the above photo. This is uncharacteristic to the other 3 locations where we would need one in terms of space. For example, its never fitting here without a major redesign, or spacing out some optics.

-It would be good to glue some metal to the outside and some kind of damping plastic/foam to the inside. Will worry about this when I have a more concrete design.

I observed a spectrum of the error signal while the cavity was locked with and without the earmuff while making a similar amount of noise, and the earmuff had little to no effect. This is expected still as I only had it on one side of the cavity. Attached is the stl for this design (the print ready .3mf file for the new bambu labs printers won't upload, if you want it just reach out). Will update when I come up with a new version.