Forskning om møll og absorpsjon

[storab]

Remarkably, they found that moth wings proved to be excellent sound absorbers, even when on top of an acoustical solid substrate, with the wings absorbing as much as 87% of the incoming sound energy. The effect is also broadband and omnidirectional, covering a wide range of frequencies and sound incident angles.

“What is even more impressive is that the wings are doing this whilst being incredibly thin, with the scale layer being only 1/50th of the thickness of the wavelength of the sound that they are absorbing,” explained lead author Dr Thomas Neil.

June: Moth wing-inspired sound absorbing wallpaper in sight | News and features | University of Bristol

www.bristol.ac.uk

 

[JENO]

Skummet bare artikkelen, men står det noe om frekvensområde? Skal jo ikke store tykkelsen til for å absorbere ultralyd fra flaggermus, men er dette anvendelig for audiofrekvenser?

 

[Dr_BASS]

Det som er interessant er vel dette:
What is even more impressive is that the wings are doing this whilst being incredibly thin, with the scale layer being only 1/50th of the thickness of the wavelength of the sound that they are absorbing,” explained lead author Dr Thomas Neil. “This extraordinary performance qualifies the moth wing as a natural occurring acoustic absorbing metasurface, a material that has unique properties and capabilities, that are not possible to create using conventional materials.”

Hvis man klarer å få produsert noe i nærheten av dette kan vel få til ganske effektive men lite plasskrevende tiltak.