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Bolt
Old 3 weeks ago
  #1
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Bolt

I have been writing for seemingly blind people for years that the Bolt area for room ratios is obsolete. I finally got some objective proof. The figure is from Toole. It includes the rarely seen graph of suitable frequencies from Bolt's note.

No fundamental frequencies of length and width for studio sized control are in the range of validity.
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Old 3 weeks ago
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Interesting. My question is your use of the "obsolete". Did the bolt area grow obsolete because sound reproduction systems and recordings have gradually increased in frequency bandwidth? Or was the bolt area never a valid criteria at all?
Old 3 weeks ago
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Quote:
Originally Posted by Kyle P. Gushue View Post
Interesting. My question is your use of the "obsolete". Did the bolt area grow obsolete because sound reproduction systems and recordings have gradually increased in frequency bandwidth? Or was the bolt area never a valid criteria at all?
Excellent question! The best I can write is better methods have evolved. The significance of these ratios as an item for acoustic analysis is less than 100 years old. The earliest mention that I am awareis of is from Sabine in 1922.
Old 3 weeks ago
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Old 3 weeks ago
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Quote:
Originally Posted by dinococcus View Post
with what type of walls, floor and ceiling, did Bolt establish hifs ratio?
Huh? Like just about every other ratio development: solid surfaces.
Old 3 weeks ago
  #6
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Quote:
Originally Posted by dinococcus View Post
Are Wood or plasterboard be solid surfaces like the concrete wall?
What does have to do with modes?
Old 3 weeks ago
  #7
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Quote:
Originally Posted by dinococcus View Post
The acoustic dimensions and the physical dimensions.
Hard reflective surfaces. Not tuned membrane absorbers.
Old 3 weeks ago
  #8
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Quote:
Originally Posted by dinococcus View Post
The french accoustician Jean pierre lafont consider walls like plasterboard mounted on rail (comon use in France building) as a tuned membrane.
You started
with how it was determined, not acoustic treatment. Regarding that acoustic treatment, search for ©Invisible Alpha. I have been such designs for DECADES. A quick summary is here:

Invisible Aplha©

Are you writing that Jean pierre lafont is plagiarizing my work? Or that of Bradley"
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Old 3 weeks ago
  #9
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Quote:
Originally Posted by dinococcus View Post
I don't know invible alpha. I will see and thanks for the link.

I write what i read.
u wan
Plasterboard mounted on rail or steele stud with mineral wool is a common way to build partitions and hide the insulation. My house is in this case, the house of my parents are in this case. In french we said placostyle mounting.

Plagiarizing or Misunderstanding?
This thread is about Bolt's room ratios. You have hijacked it to room treatment.

If you want to discuss that start a thread about it. Do not destroy other threads.
Old 2 weeks ago
  #10
Gear Maniac
Bolt, 1946. Things change. Fashions etc.

https://www.salford.ac.uk/research/s...ng-for-studios
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