sonic inertness vs. weight?
The folks on r.a.p. have not volunteered an answer to this question, so I
pose it here. What is the lightest structural material that has a reasonable
degree of sonic inertness?
The purpose is construction of a device known as a "gobo", a portable
acoustic baffle. A fairly traditional method form of construction would have
a core hunk of plywood, coated with a less firm and more absorbent material.
But it would be too heavy for easy portability, especially considering the
need for ancilliary support.
There is a broad category of stuff called "structural foam." The most common
example is "foamcore", a kind of whiteboard, found at stationary outlets.
But it's not strong enough. Is anyone familiar with similar materials that
have good mechanical strength?
Bob Morein
(310) 237-6511
.
Relevant Pages
- Re: Access to the Broad Street route
... planning on making my way over to the site to see what condition it is ... There is a further part of Broadgate under construction that must be on ... result from bringing in materials and installing them will undoubtedly ... be arriving by rail from that end. ...
(uk.transport.london) - Re: False rumor! (Re: H.R. 2454 (Cap and trade bill))
... 30 year old wormer medications, or have you started using the upgraded medications? ... Is your horse still wearing a 30 year old horse blanket, or did you get a more modern blanket that fits better, stays dry better? ... New construction done with improved materials ... ...
(rec.equestrian) - Re: Going, going, gone !
... In our construction - our original all-wood or our current wood/Kevlar composites - all surfaces are multi-ply laminates, formed with resin under heat & pressure into the required shapes leaving no internal stress. ... A conventional wood construction, OTOH, starts start with sheet materials which are forced into the end form & held there against internal stress. ... the continuity which had held the stressed shell in shape is breached & the consequent rearrangement of the internal stresses pull things out of shape. ... Traditional construction made it hard to ensure such continuous impermeability, due to the methods of construction & the relatively poor durability & impermeability of traditional finishes. ...
(rec.sport.rowing) - Re: Access to the Broad Street route
... There is a further part of Broadgate under construction that must be on ... result from bringing in materials and installing them will undoubtedly ... While I suspect some of the public may moan once the ... I think this part of the railway will belong to TfL and not Network Rail ...
(uk.transport.london) - Re: core material for gobo?
... This is a construction material that may fit your application. ... in 4x8 foot sheets about 8 inches thick (6 inches of foam between ... Gatorboard is a graphics arts presentation material - foam between nice ... with similar materials that have good mechanical strength? ...
(rec.audio.pro) |
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