AudioRoundTable.com - RDF feed
type: channel
description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: Dipoles and directivity
items: Re: Dipoles and directivity
items: For the neighbors then?
items: Re: For the neighbors then?

Dipoles and directivity
type: item
description: Hello! Is it possible to get more directivity in the bass region, 20-80Hz, with dipole subwoofers? My first idea was a ring of multiple speakers but I guess a 4m (13.1ft) in diameter ring would only have 6dB directivity at 344/4=86Hz? Cheers, Mattias
creator: Rapid
date: 2006-01-28T17:45:19-00:00

Re: Dipoles and directivity
type: item
description: Once one is below the Schroeder frequency, directivity is not really a very valid concept as the rooms modal pattern dominates the situation regardless of the source type. Although different source types do excite the modes differently, directivity is not really the issue. Now from say 200-500 Hz a dipole directivity could be of use, but I've tried to make this work and can't seem to work it out effectivly.
creator: Earl Geddes
date: 2006-01-30T12:38:02-00:00

For the neighbors then?
type: item
description: OK, but if I live in an appartment and would like to disturb the neighbors as little as possible. Would this help to reduce the bass they're hearing? Cheers, Mattias
creator: Rapid
date: 2006-01-30T15:48:40-00:00

Re: For the neighbors then?
type: item
description: Only to the extent that the dipoles produce much less bass. Issolating bass is by far the most diffiuclt of all noise control problems. Complete structural issolation is usually required and this is completely out of the question unless you own the space. If you don't own the space then the only solution is the volume conrol.
creator: Earl Geddes
date: 2006-01-30T16:34:18-00:00

Re: For the neighbors then?
type: item
description: I was afraid that would be your answer As always, you give fast and good answers to questions. Thanks alot Earl!
creator: Rapid
date: 2006-01-30T19:07:25-00:00