Acoustic Fields: How to Build a Diaphragmatic Absorber (2019)

[walterbell]

https://www.acousticfields.com/how-to-build-a-diaphragmatic-absorber/

[gwnywg]

I guess this will not absorb low frequency vibrations transmitted through walls, generated by neighbor living above me? :)

[yetihehe → gwnywg]

If you covered your ceiling (and wall which transmit sound) with such boxes, it would.

[pfdietz]

I'd figure low frequency sound could be better absorbed by active cancellation.

[mastercheif → pfdietz]

For those interested, the AVVA C20 active bass trap is considered the gold standard for active low-frequency control: https://www.psiaudio.swiss/avaa-c20-active-bass-trap/

[jrace → pfdietz]

active noise cancellation does not absorb (and therefore prevent transmision) of the sound, it instead just causes the sounds to be "not heard" at a small location.

[thulle → pfdietz]

Double Bass Arrays might be an interesting rabbit hole :)

[wnkrshm]

Reminds me of dielectric mirrors/anti-reflection coatings, but nonlinear.