acoustic lens for bass |
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davey t
Young Croc Joined: 11 March 2004 Location: Bristol UK Status: Offline Points: 1428 |
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Posted: 03 November 2006 at 5:02pm |
Hey
Reading about acoustic lenses. They were a fad for treble back in the 50s and they use them in sonar applications for beamforming and to control dispersion. They are used on some hi-fi speakers. Could they be applied to lower frequencies? If you can find a suitable material which has a slightly different density to air, correctly shaped, could you not focus the sound waves? I just have this vision of a bass bin horn with an acoustic lens at the mouth which gives a narrow dispersion, or even focuses the bass to a single point!!!? |
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tb_mike
Old Croc Joined: 01 October 2004 Location: New Zealand Status: Offline Points: 2744 |
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Wavelengths of 8metres dont encourage lens usage,I think.
You can adjust the dispersion in general terms- make a tall labhorn stack or a really wide one for example. Edited by tb_mike - 03 November 2006 at 8:51pm |
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gingerbiscuit69
Registered User Joined: 23 September 2005 Location: United Kingdom Status: Offline Points: 2540 |
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maybe a giant tube would direct the bass a bit more, but still wouldnt be too good for the tuning
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
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The big 2395 lense can be used down to 500hz...
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Be seeing you.
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