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Adjustable Spring Bass Traps

If a standard basket / cone speaker can produce a certain frequency, can the same design collect a certain frequency?

I want to design an "Adjustable Spring Bass Trap", with passive radiators as the collectors..  I need to do some tinkering.

We use to call something that took vibration and surge out of hydraulics an accumulator or better known as a shock absorber.

I have a pair of 12 cubic foot columns 1.5" thick 60 x 22 x 18".

I have 8 12s, 4 15s and 4 18" high excursion radiators. I think 1 12, 1 15" and 1 18" will do the job.

I think if they were concave with no dust cap or inverted dust caps that would improve collection.

Do I port the the passive radiator? Seems weird to port a port, or will the box just collect bad BASS so to speak?

Do I hang dingle berries inside to dampen the "BAD BASS"? I'm thinkin', I think.. Could just be my OCD kickin'

1/2" rubber rope inside going through eyelets, 20 or 30 will do. Terminate the rubber rope with hog rings or zip ties.
Can I adjust the rubber rope to collect "Bad Bass" too?

An IB design, a ported design, and active design, that uses an active speaker to react to "BAD BASS"?

Me the dog and the rabbit (Junior) got an idea, I haven't let the chickens in on yet.. 

What do you think? 
oldhvymec

Showing 1 response by rixthetrick

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rixthetrick
1,060 posts
 
@oldhvymec - I did find a broadband absorber, designed by Dennis Foley of Acoustic Fields.
He uses a sealed box, with perforated internal walls filled with activated charcoal.
I have visited the Genolan caves in New South Wales and the caves are used for concerts and recordings beacause of the acoustical properties of the porous limestone formations.

https://www.acousticfields.com/product/acda-10-studio/

It uses activated charcoal within the cabinet, the micro pores do the heavy lifting. When I first read it, I remembered the caves.

He does sell plans for DIY. Currently I am building four of his QRD17 diffusers (from plans) out of solid cherry wood.
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