Jump to content

what is a corner bass absorber?


peshewah

Recommended Posts

Yes you absorb the bass then you buy a subwoofer to fill it in. You reflect the highs then buy heavy drapes to soften the treble. Buy tube amps to have more liquid mids. Dont forget to buy Mcpingo wood puks to get better imaging. Or sticky little dots to place around the room to correct for all the above.

Link to comment
Share on other sites

I seen it in the "garage sale" section and I was wondering, whats it do?

If you are asking about bass traps, hopefully you will get a strait answer. The replys so far are from (lovable) d*ckheads having fun with you. Shame on you boys. (Jack)

A clear answer from reputable people will follow. (I hope)

tc

Link to comment
Share on other sites

As you read, it is very difficult to control or absorb low frequency sound. The wavelengths are very long and thus any absorber of reasonable size is relatively small.

OTOH, the overall room dimensions are usually very large. You do have hard walls which are a wavelenght apart at bass frequencies. .This leads to reinforcement of bass wavelengths and also interference where they null out. In a rough way, our rooms are like three pipe organ tubes. One is floor to ceiling, the other is front wall to back wall, the third is side wall to side wall.

As you can imagine, if we wanted to damp those effects out, we would have to stuff the entire room with some absorbing material. But we can't.

There are some related room effects though. There are diagrams about this which show that the highest sound pressure is in the corners. You usually see this in a two-dimensional diagram.

PWK has diagrams where his K-Horns are shown in a reflective corner and we see multiple images of the speaker as a source. With the mirror images, the speaker is bigger. In some ways, eight times bigger than with no reflective surfaces. It the same as saying it is in 1/8th space.

And you read that the corner is equivalent to an extension of the bass horn flare. And any horn flare translates a high pressure at the small end of a horn to a low pressure area in the mouth.

These corner effects are all manifestations of a common principle. The corner acts like a horn.

What might not be quite as apparent is that horns work both ways, and corners, being horns, work both ways.

If the K-Horn in a corner "looks" eight times bigger as a radiator, so does an absorber in a corner. That is why, in theory, bass absorbers can be put in a corner.

Gil

Link to comment
Share on other sites

Put the sub where you normally sit. Play some bass heavy material or test tones at a reasonable level (sine waves are tough on subs when played loud). Crawl around the room (with a dB meter if you have one) and see where the bass sounds the "tightest" or best. Thats where you put your sub.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...