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Old 22nd August 2007, 11:33 AM   #1
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Default Sound domes

Hi,

A friend of mine has a handicapped child. To help the kid enjoy his music without disturbing others, he was looking for something like this:

http://www.sounddomes.com/20inch.htm

Has any of you experience in using such a device (I understand they are used in shops and exhibitions). What would be involved to build one ourselves?

Thanks for any help,

Jan Didden
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Old 22nd August 2007, 11:54 AM   #2
el`Ol is offline el`Ol  Germany
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This would be an alternative:
http://www.sonus.de/php/p_produkte.php?produkt_id=302
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Old 22nd August 2007, 12:21 PM   #3
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Quote:
A friend of mine has a handicapped child. To help the kid enjoy his music without disturbing others, he was looking for something like this:
Have handicapped kids less rights disturbiung others while einjoying their music ?

Back to on-topic: With the ones that I heard so far you can't talk of enjoying music. The sound was like telphone quality.

I'd raher suggest either headphones or something that is meant for listening in the closefield.

Narrow-beam radiation can also be done with arrays of small drivers if needed.

The electrostatic solution looks good (apart from the LF reproduction) but I guess it might be quite expensive.

Regards

Charles
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Old 22nd August 2007, 01:24 PM   #4
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Quote:
Originally posted by phase_accurate
Have handicapped kids less rights disturbiung others while einjoying their music ? [snip]
Not at all, and I was neither implying that nor stating that!

Jan Didden
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Old 22nd August 2007, 02:46 PM   #5
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We used that principle on an exhibition stand for EA games a good few years ago, only we had to get, (very expensive), custom made acrylic domes made. All you need is a parabolic section, I wonder if you could make something up using an old umbrella covered in paper mache or plaster impregnated bandages?
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Old 22nd August 2007, 03:06 PM   #6
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I wonder if a couple of cases of plastic drinking straws stacked in front of the speakers would make them directional. leave the cardboard sides to hold the straws together, but remove top and bottom and stack on side to direct the sound forward only....
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Old 23rd August 2007, 01:30 AM   #7
OzMikeH is offline OzMikeH  Australia
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Use a small satellite dish or a large mixing bowl. Very cheap reflectors.
A very small driver in a little box at the focal point would provide quite directional sound.

The dish/ bowl could be painted with patterns, or white with one of those little motorized lamps shining on it.

Remember bass is less directional, you may need to filter out the low frequencies to reduce the disturbance to others.
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