100 hz dip - Page 7 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #61 of 78 Old 11-11-16, 01:43 PM
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Re: 100 hz dip

Frequency response is important - but so is impulse response, a balanced decay time curve, etc.

The trick to frequency response is not just what you use. It's more importantly knowing where the problem is coming from so you know how and where to treat.

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post #62 of 78 Old 11-11-16, 02:07 PM Thread Starter
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Re: 100 hz dip

Yes, but for as far as i understand my frequency response is quite oke, not perfect, but my impulse response , decay etc is less oke.

Wanting to change the frequency response needs more isolation i can imagine as aposed to changing the decay, impulse etc. am i right ?

So besides that, what do you think about puukorva's statement about using diffusers for the rear and front ?
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post #63 of 78 Old 11-11-16, 02:23 PM
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Re: 100 hz dip

Absorption can impact all 3 pending what it is and where it is. Diffusion does not change decay time. Diffusion on the rear wall is personal preference. On the front wall the only time I use diffusion is when using an open baffle or panel dipole type of speaker to deal with the comb filtering from the rear wave but doing so without removing more energy from the room. If a typical monopole speaker, you're more concerned with is SBIR which must be deal with via absorption as a diffuser that would go low enough to address it would be unreasonably sized.

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post #64 of 78 Old 11-11-16, 07:11 PM Thread Starter
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Re: 100 hz dip

The advice was not given i think becouse of the 100 hz null, "that" problem was already kindof fixed at page 3 by finding a better listening posistion. you can check the waterfall and frequency response on page 3.
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post #65 of 78 Old 11-12-16, 04:25 AM Thread Starter
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Quote:
puukorva wrote: View Post
Oh, ok. I didn't read the previous posts word for word, I just wanted to mention the REW room simulation because I think it's an awesome feature in the awesome software.
I agree, it's verry awesome ) ,

* The title is a bit misleading by now, so i understand, i can't find an option though to change the title. Is this possible? somebody ?
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post #66 of 78 Old 11-12-16, 10:18 AM
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Re: 100 hz dip

Quote:
puukorva wrote: View Post
You're correct in that if you want to maximise the effect of a small diameter absorber, the best way to do that is to leave a gap of a similar size to the barrier. That however, is no rule of a thumb on setting up absoroption.
Other than it's impractical to try do do porous absorbers to tune narrowly.

Also, the test results you mentioned earlier you're misreading. 8 of the 12 pieces were done leaning across the wall/floor junction. That's a corner just like any other vertical corner. The other 4 were on a wall. That replicates the way those panels are used in many rooms - 8 in corners, 2 side wall reflections, 2 ceiling reflections.

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post #67 of 78 Old 11-12-16, 04:20 PM
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Re: 100 hz dip

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Sorry but you're trying to explain physics can be broken. Clearly it isn't so. The tested elements were not comparable to DIY soft absorbers but used multiple technologies combined (according to their website).
What is the link to their website?

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post #68 of 78 Old 11-13-16, 10:32 AM
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Re: 100 hz dip

Trust me. Those did not have the membrane. If they did, the high frequency absorption would be close to zero which it's not. We were there when the testing was done.

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post #69 of 78 Old 11-14-16, 06:37 AM
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Re: 100 hz dip

Again, theory vs data. Bees shouldn't be able to fly according to physics either. But they do.

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post #70 of 78 Old 12-09-16, 07:16 AM Thread Starter
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Re: 100 hz dip

I'm currently bussy making the soundpanels and all is going fine. But i got another question about the room acoustics. Im planning to buy a diffrent floor. I have read a bunch of diffrent articles saying diffrent things about it.
Im wondering, what would be the best floor to get ?

Carpet
Laminate
Vinyl

For carpet it absorbs high frequency's and it might sound dull and boomy in the end is what i found
For laminate it can sound bad by the reflective sound it produces
For vinyl i couldnt find an awnser.

Also i read that an hard surface would work better with soundpanels and carpet would make it sound boomy

Source

Im planning to get Vinyl though, but i thought lets check what the experts know about it before buying it
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