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Keeping cat away from monitor: Localized ultrasonic 'no-cat' zone..



 
 
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  #1  
Old April 10th 04, 12:20 AM
Jim Witte
external usenet poster
 
Posts: n/a
Default Keeping cat away from monitor: Localized ultrasonic 'no-cat' zone..

Hi,

Here's an idea I've come up with in the past few weeks: make a device
that would create a focused, low-intensity ultrasonic field that could
create (hopefully) a "no-cat" zone in front of a computer-monitor for
instance (this is our problem) The only two problems I see is 1) making
the signal low-level enough that it would just annoy the cat a little and
nothing more, and 2) figuring out how to focus it. I'm thinking
pizoelectric speakers might be able to do that.

What is the an *upper* limit on what cats can hear? The "focusable
speakers" that I've heard of work by using two ultrasonic signals to
create interferance patterns low enough that people can here them (cats
could be a problem here). Theoretically, the same could be done for
cats, except that the source frequency would have to be higher than the
upper range of the cat's hearing.

Other than that (which would take quite a bit of stuff, time, money,
math, and experimentation to make), does anyone have any idea how to
teach a cat not to walk back and forth in front of a computer monitor.
Other than having the owner pet the cat rather than use the computer -
which is of course what the cat wants, althogh I think our's does it just
for spite. We would be perfectly happy if he'd just either sit off to
the side, or lay down, and we'd hapily scratch his head. But no - he
insists on wandering back and forth in front of the monitor, and
unfortunately, none of us have X-ray vision and the cat is not
transparent

Jim
  #2  
Old April 10th 04, 12:42 AM
Karen Chuplis
external usenet poster
 
Posts: n/a
Default

in article , Jim Witte at
wrote on 4/9/04 6:20 PM:

Hi,

Here's an idea I've come up with in the past few weeks: make a device
that would create a focused, low-intensity ultrasonic field that could
create (hopefully) a "no-cat" zone in front of a computer-monitor for
instance (this is our problem) The only two problems I see is 1) making
the signal low-level enough that it would just annoy the cat a little and
nothing more, and 2) figuring out how to focus it. I'm thinking
pizoelectric speakers might be able to do that.

What is the an *upper* limit on what cats can hear? The "focusable
speakers" that I've heard of work by using two ultrasonic signals to
create interferance patterns low enough that people can here them (cats
could be a problem here). Theoretically, the same could be done for
cats, except that the source frequency would have to be higher than the
upper range of the cat's hearing.

Other than that (which would take quite a bit of stuff, time, money,
math, and experimentation to make), does anyone have any idea how to
teach a cat not to walk back and forth in front of a computer monitor.
Other than having the owner pet the cat rather than use the computer -
which is of course what the cat wants, althogh I think our's does it just
for spite. We would be perfectly happy if he'd just either sit off to
the side, or lay down, and we'd hapily scratch his head. But no - he
insists on wandering back and forth in front of the monitor, and
unfortunately, none of us have X-ray vision and the cat is not
transparent

Jim


I just put cat perches next to the desk with a purrpad in it. Works pretty
well.

Karen

  #3  
Old April 10th 04, 12:42 AM
Karen Chuplis
external usenet poster
 
Posts: n/a
Default

in article , Jim Witte at
wrote on 4/9/04 6:20 PM:

Hi,

Here's an idea I've come up with in the past few weeks: make a device
that would create a focused, low-intensity ultrasonic field that could
create (hopefully) a "no-cat" zone in front of a computer-monitor for
instance (this is our problem) The only two problems I see is 1) making
the signal low-level enough that it would just annoy the cat a little and
nothing more, and 2) figuring out how to focus it. I'm thinking
pizoelectric speakers might be able to do that.

What is the an *upper* limit on what cats can hear? The "focusable
speakers" that I've heard of work by using two ultrasonic signals to
create interferance patterns low enough that people can here them (cats
could be a problem here). Theoretically, the same could be done for
cats, except that the source frequency would have to be higher than the
upper range of the cat's hearing.

Other than that (which would take quite a bit of stuff, time, money,
math, and experimentation to make), does anyone have any idea how to
teach a cat not to walk back and forth in front of a computer monitor.
Other than having the owner pet the cat rather than use the computer -
which is of course what the cat wants, althogh I think our's does it just
for spite. We would be perfectly happy if he'd just either sit off to
the side, or lay down, and we'd hapily scratch his head. But no - he
insists on wandering back and forth in front of the monitor, and
unfortunately, none of us have X-ray vision and the cat is not
transparent

Jim


I just put cat perches next to the desk with a purrpad in it. Works pretty
well.

Karen

  #4  
Old April 10th 04, 02:27 AM
Mary
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Posts: n/a
Default

does anyone have any idea how to
teach a cat not to walk back and forth in front of a computer monitor.


You could use a "scat mat." I personally let me cat sit next to the monitor on
her own mat. She will walk in front of the monitor when it's dinner time, then
I feed her.
  #5  
Old April 10th 04, 02:27 AM
Mary
external usenet poster
 
Posts: n/a
Default

does anyone have any idea how to
teach a cat not to walk back and forth in front of a computer monitor.


You could use a "scat mat." I personally let me cat sit next to the monitor on
her own mat. She will walk in front of the monitor when it's dinner time, then
I feed her.
  #8  
Old April 11th 04, 02:44 AM
Liz
external usenet poster
 
Posts: n/a
Default

Jim Witte wrote in message ...
Hi,

Here's an idea I've come up with in the past few weeks: make a device
that would create a focused, low-intensity ultrasonic field that could
create (hopefully) a "no-cat" zone in front of a computer-monitor for
instance (this is our problem) The only two problems I see is 1) making
the signal low-level enough that it would just annoy the cat a little and
nothing more, and 2) figuring out how to focus it. I'm thinking
pizoelectric speakers might be able to do that.

What is the an *upper* limit on what cats can hear? The "focusable
speakers" that I've heard of work by using two ultrasonic signals to
create interferance patterns low enough that people can here them (cats
could be a problem here). Theoretically, the same could be done for
cats, except that the source frequency would have to be higher than the
upper range of the cat's hearing.

Other than that (which would take quite a bit of stuff, time, money,
math, and experimentation to make), does anyone have any idea how to
teach a cat not to walk back and forth in front of a computer monitor.
Other than having the owner pet the cat rather than use the computer -
which is of course what the cat wants, althogh I think our's does it just
for spite. We would be perfectly happy if he'd just either sit off to
the side, or lay down, and we'd hapily scratch his head. But no - he
insists on wandering back and forth in front of the monitor, and
unfortunately, none of us have X-ray vision and the cat is not
transparent

Jim


Lol, this is funny. Well, I had a similar problem. One of my cats
seemed very jealous of the monitor because it got so much attention
from me that one day he simply peed on it - this was about a month
ago. Oh well, the monitor burned, obviously, and couldn´t be fixed. I
got another monitor and made a wooden box to fit it inside leaving 4
inches on each side and six inches on the top to avoid overheating. My
cats used to love sleeping on top of my old monitor too and that
problem is also gone with the box. You can make the box deep enough to
reach the edge of your table so that way the cat will not be able to
keep crossing back and forth in front of it. Wish you luck and
hopefully your kitty won´t pee on your monitor.
  #9  
Old April 11th 04, 02:44 AM
Liz
external usenet poster
 
Posts: n/a
Default

Jim Witte wrote in message ...
Hi,

Here's an idea I've come up with in the past few weeks: make a device
that would create a focused, low-intensity ultrasonic field that could
create (hopefully) a "no-cat" zone in front of a computer-monitor for
instance (this is our problem) The only two problems I see is 1) making
the signal low-level enough that it would just annoy the cat a little and
nothing more, and 2) figuring out how to focus it. I'm thinking
pizoelectric speakers might be able to do that.

What is the an *upper* limit on what cats can hear? The "focusable
speakers" that I've heard of work by using two ultrasonic signals to
create interferance patterns low enough that people can here them (cats
could be a problem here). Theoretically, the same could be done for
cats, except that the source frequency would have to be higher than the
upper range of the cat's hearing.

Other than that (which would take quite a bit of stuff, time, money,
math, and experimentation to make), does anyone have any idea how to
teach a cat not to walk back and forth in front of a computer monitor.
Other than having the owner pet the cat rather than use the computer -
which is of course what the cat wants, althogh I think our's does it just
for spite. We would be perfectly happy if he'd just either sit off to
the side, or lay down, and we'd hapily scratch his head. But no - he
insists on wandering back and forth in front of the monitor, and
unfortunately, none of us have X-ray vision and the cat is not
transparent

Jim


Lol, this is funny. Well, I had a similar problem. One of my cats
seemed very jealous of the monitor because it got so much attention
from me that one day he simply peed on it - this was about a month
ago. Oh well, the monitor burned, obviously, and couldn´t be fixed. I
got another monitor and made a wooden box to fit it inside leaving 4
inches on each side and six inches on the top to avoid overheating. My
cats used to love sleeping on top of my old monitor too and that
problem is also gone with the box. You can make the box deep enough to
reach the edge of your table so that way the cat will not be able to
keep crossing back and forth in front of it. Wish you luck and
hopefully your kitty won´t pee on your monitor.
  #10  
Old April 12th 04, 06:56 PM
dgk
external usenet poster
 
Posts: n/a
Default

On 10 Apr 2004 18:44:18 -0700, (Liz) wrote:

Jim Witte wrote in message ...
Hi,

....
Other than that (which would take quite a bit of stuff, time, money,
math, and experimentation to make), does anyone have any idea how to
teach a cat not to walk back and forth in front of a computer monitor.
Other than having the owner pet the cat rather than use the computer -
which is of course what the cat wants, althogh I think our's does it just
for spite. We would be perfectly happy if he'd just either sit off to
the side, or lay down, and we'd hapily scratch his head. But no - he
insists on wandering back and forth in front of the monitor, and
unfortunately, none of us have X-ray vision and the cat is not
transparent

Jim


Lol, this is funny. Well, I had a similar problem. One of my cats
seemed very jealous of the monitor because it got so much attention
from me that one day he simply peed on it - this was about a month
ago. Oh well, the monitor burned, obviously, and couldn´t be fixed. I
got another monitor and made a wooden box to fit it inside leaving 4
inches on each side and six inches on the top to avoid overheating. My
cats used to love sleeping on top of my old monitor too and that
problem is also gone with the box. You can make the box deep enough to
reach the edge of your table so that way the cat will not be able to
keep crossing back and forth in front of it. Wish you luck and
hopefully your kitty won´t pee on your monitor.



I have one of those cheap "monitor shelves" that attaches to the top
of the monitor with velcro and two legs that keep it up away from the
vents. It gets warm enough that the cats will sit on it for some time
though not often, oddly enough. Maybe they don't like the static
charge? It was pretty cheap ($20 or so) at the local PC fair.

That's always been my problem with the LCD kind (LED?). They're just
too thin. I mean, where is the cat supposed to sit? Talk about your
bad ergonomics...


 




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