MASTER CLASS IN AUDIO - SESSION 10 - FT. RON SAURO AND JOHN BRANDT

Session 10 of the series on 'Master Class in Audio' where we resume from the earlier session conducted by the two colossi - ex Nasa scientist Ron Sauro and renowned studio designer John Brandt. Aspects of small room acoustics are covered followed by some elucidation of the latest work being done by the two on redefining the way absorption is to be understood.
Big thanks to Mr. Raja for sponsoring the Zoom account which was used to host the session.

[@telescopic_]

Thank you for hosting this talk Karthik and thank you Ron and John for your time and your knowledge.

[@eltute1]

WOW WOW WOW, man.....this sessions are insanely vigorizing. It just makes you want to dig it more and more. Keep it comming please. For the ones like me that don't have anyone to discuss this kind of stuff it's life saving. Thanks to all of you, each one of you looks so commited to share information that is so difficult to get FOR FREE that it blows my mind. Really thank you so much for the time you have give us!!!!!!!!! Greetings from Uruguay!

[@EduardBroekman]

Thank you everyone for this outstanding masterclass; a well spend 4 hours and I picked up a lot of ideas for non-localised sound (mono) playback!

[@krogg5868]

This is a remarkable discussion.

[@JuanJose-wt5yj]

Thanks for the video. At the moment I see that they are clear that they defend that Sabine's formula is not correct for acoustically small rooms. It has been discussed for years but I hope that in the presentation of the papers of his investigation everything will be clear. I can imagine the criticism they will be having. It strikes me that with a broadband porous absorbent panel of only 4" an absorption coefficient of 0.8 can be achieved up to 80-100 Hz. I have already seen that they say that the panel is made with 2 2" plates and each plate with a different density. Can you explain it in another video? Without further ado, many thanks to Mr. Ron Sauro and John Brandt for these 2 videos and to the team that has made it possible to have these guests. written with translator Greetings...

[@JHBrandt]

Juan, the 4" panel shown is made of the same material four inches thick. The absorption response is flat from 80 to 40 kHz. Amazing! A year ago I wouldn't have thought so.

[@JuanJose-wt5yj]

@@JHBrandt Thank you for the deference in answering my query. I will be attentive to future videos, forums, to see if they comment more things on the subject. Written with translator Greetings

[@EssubW]

59:23 If change of phase is change in direction and it heats the boundary it interacts with. Diffraction happens most pronounced with a coherent source and the diffraction angle is dictated by the boundary. The most efficient geometrical shape for diffractive phase change is circle. Best 3d shape against pressure from outside is a sphere. When certain parameters align, crossing a treshold in relation to the physics involved, the phase change on the boundary layer (Impedance change) of a collapsing bubble is nearly instant chain reaction, that can only change phase from as coherent as possible (diffraction) to as non-coherent as possible (circle/sphere). The spherical shape acts as a 3 dimensional lens, focusing the mixed phase wavefronts symmetrically, diffracting shorter and shorter wavelengths on the surface as it collapses. The instant change of phase on the impedance change layer releases heat. @JHBrandt That's sonoluminescence!

[@the_pond]

great info. would love a follow up, including John ;) !

[@dansantoso48]

can you tell me what app do u use to model the panel? thanks