Alan Parsons Drum Recording at State of the Ark Studios
https://m.youtube.com/watch?v=uKWRb_7v_so#fauxfullscreen
at 8:50
Possibly an overlooked art is acoustical engineering. For example BBC, EMI have been using elastomer membrane low frequency absorbers spaced from room walls. There is no use if they were right up against the wall as particle velocity there is zero. In fact velocity may not be 0 even at the boundary of a wall as it may vibrate too [BBC]. Are many problems we encounter nowadays like drums ringing all over the place, one drum exciting another etc due to the fact that elastomer membranes are not used? Is it possible that membrane absorbers desipate this useless recoding ruining energy?
The idea is that the membranes rather that the drums themselves vibrate sympathetically. But elastomer membranes do not remit much of that energy. They desipate it. They dissipate it to flex the material. Since there is an hysteresis loop they dissipate it to heat. Such a material is linoleum. See also for example Acoustics for Radio and Television Studios - Gilford - BBC
Other reference:
Acoustics in the BBC
http://downloads.bbc.co.uk/rd/pubs/reports/1958-29.pdf
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