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Subject:
Re: whisper dishes
From:
Eric Meyer <[log in to unmask]>
Reply To:
Informal Science Education Network <[log in to unmask]>
Date:
Wed, 30 Jan 2013 16:35:29 +0000
Content-Type:
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ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************

I don't know precisely how far our whisper dishes are apart, however I do have a suggestion if you do not plan on anchoring them to the ground; the dishes tend to move a bit (wind, children, etc.), we have found that spray painted markings on the ground help us re-align them quickly, easily, and accurately.  

Eric Meyer
Educational Services Director
505-224-8386
[log in to unmask]

Explora
1701 Mountain Road NW
Albuquerque, NM 87104

505-224-8310 fax
www.explora.us

-----Original Message-----
From: Informal Science Education Network [mailto:[log in to unmask]] On Behalf Of Glen Moore
Sent: Wednesday, January 30, 2013 4:07 AM
To: [log in to unmask]
Subject: Re: whisper dishes

ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************

We put our 5' dishes 40' apart - worked really well. Then we installed a temporary exhibition with metal signage panels directly between them I.e. removed the line of sight. They still worked almost as well! Presumably the sound travelled over the top of the panels and was then focussed. (?)

Sent from my iPhone

On 30/01/2013, at 2:37 PM, "Eric Siegel" <[log in to unmask]> wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology 
> Centers Incorporated, a worldwide network of science museums and related institutions.
> **********************************************************************
> *******
> 
> hi, chuck,  you might get more responses if you change the title line.  We have whisper dishes that are probably 80 feet apart, and about 6 ft diameter.  but I don't have any general rules of thumb.
> 
> eric siegel
> 
> On Jan 29, 2013, at 5:04 PM, Chuck Howarth <[log in to unmask]> wrote:
> 
>> ISEN-ASTC-L is a service of the Association of Science-Technology 
>> Centers Incorporated, a worldwide network of science museums and related institutions.
>> *********************************************************************
>> ********
>> 
>> Hi, guys.  Does anyone know if there is an intrinsic limit on how far 
>> apart whisper dishes can be?  Would they work at a separation of 100 
>> feet?  And if they are farther apart, does that mean that the dishes 
>> need to be bigger?  Many thanks,
>> 
>> Chuck Howarth, Vice President
>> ____________________________________
>> 
>> G Y R O S C O P E I N C
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>> blog:  http://museums-now.blogspot.com 
>> ____________________________________
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>> 
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>> 
>> 
>> 
>> 
>> *********************************************************************
>> ** For information about the Association of Science-Technology 
>> Centers and the Informal Science Education Network please visit www.astc.org.
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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.

Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.

The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit http://www.lsoft.com/LISTSERV-powered.html.

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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.

Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.

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