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Neighbor's house alarm triggers when I put my car in reverse

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Re: Neighbor's house alarm triggers when I put my car in reverse

#281

Post by magic_beans »

1wd wrote: post #204
sundarurfriend wrote: post #193

Earlier quoted context omitted.

It sounds like it was written or told by an engineering person and then mangled into this BusinessExecutive™-speak by some marketing person. And the story doesn't have that big a payoff to justify that either. All the plugging did was make me slightly annoyed and averse towards the brand and that bloody catchphrase.

The story has apparently been recounted and rewritten many times since at least the "June 1978 issue of Traffic Safety magazine". https://www.snopes.com/autos/techno/icecream.asp

That makes the biz-speak story posted on the KT website all the more distasteful.

Re: Neighbor's house alarm triggers when I put my car in reverse

#282

Post by bonestamp2 »

diggum wrote: post #255

Shortly after a big upgrade to the application I worked on, we started to get bug reports on our forum about a pretty ugly bug where a modal window would get “stuck” after clicking OK. The window would no longer respond to users but the application would act as if it were still up, and the only way out was to kill the process and lose all the unsaved work. Understandably, the complaints got louder and angrier as no o…

This is great!

We had a problem with piracy for awhile. We spent nearly a million dollars on some of the best licensing software out there and over 2 years of tweaking it to try and eliminate all attack vectors and we still had piracy. We learned even the best anti-piracy methods will be broken eventually. In the end, the proper solution was pretty simple... we just rewrote our application as a web app and now only people who pay can login.

I mean come on people, if you're using professional software and expect to be paid for your work, pay the other professionals for their work too.

Re: Neighbor's house alarm triggers when I put my car in reverse

#283

Post by jasonmp85 »

drawnwren wrote: post #171

I drive a modified car, this is obviously the glass break sensors in the house. My car sets the sensors of other aftermarket car alarms off as I drive around because of the exhaust frequency. I imagine the same thing is happening here.

I didn't realize anyone would actually admit to driving such a public nuisance.

Re: Neighbor's house alarm triggers when I put my car in reverse

#284

Post by [deleted] »

__david__ wrote: post #225
smlacy wrote: post #130

Earlier quoted context omitted.

We had one of these as well -- a fairly standard routine of TV after dinner before going to bed quickly taught the dog that the ultrasonic sound made by the "Off" command to the TV meant "everybody go upstairs and go to bed". You could actually just press that "off" button at any time, and the dog would look around and do that funny "Dog shrug" thing they do, and go upstairs and lie down, even if it was the middle of…

My dog was similar, but the sound he triggered on was the CRT turning off. You could sit perfectly still and press the off button the remote (so as not to give any body language signs) and he'd wake up, and wander off to the bedroom for the night.

[deleted]

Re: Neighbor's house alarm triggers when I put my car in reverse

#285

Post by theandrewbailey »

Pharylon wrote: post #257
__david__ wrote: post #225

Earlier quoted context omitted.

My dog was similar, but the sound he triggered on was the CRT turning off. You could sit perfectly still and press the off button the remote (so as not to give any body language signs) and he'd wake up, and wander off to the bedroom for the night.

When I was young and my hearing was better, I think I had a slightly-better-than-normal upper end to my hearing. Often, I would hear CRTs whining that no one else did. I vividly remember when I realized it. One day in class we were watching a tape and the TV was whining the entire time. After the tape was over, the teacher started talking about what we'd seen, but didn't turn the TV off. I asked him to, because the s…

You're hearing the flyback transformer vibrate. I could hear CRT TVs like that, but I haven't been around one in years.

In television sets, this high frequency is about 15 kilohertz (15.625 kHz for PAL, 15.734 kHz for NTSC), and vibrations from the transformer core caused by magnetostriction can often be heard as a high-pitched whine. [0]

[0] https://en.wikipedia.org/wiki/Flyback_transformer

Re: Neighbor's house alarm triggers when I put my car in reverse

#286

Post by [deleted] »

Pharylon wrote: post #257
__david__ wrote: post #225

Earlier quoted context omitted.

My dog was similar, but the sound he triggered on was the CRT turning off. You could sit perfectly still and press the off button the remote (so as not to give any body language signs) and he'd wake up, and wander off to the bedroom for the night.

When I was young and my hearing was better, I think I had a slightly-better-than-normal upper end to my hearing. Often, I would hear CRTs whining that no one else did. I vividly remember when I realized it. One day in class we were watching a tape and the TV was whining the entire time. After the tape was over, the teacher started talking about what we'd seen, but didn't turn the TV off. I asked him to, because the s…

[deleted]

Re: Neighbor's house alarm triggers when I put my car in reverse

#287

Post by roryisok »

roryisok wrote: post #261
Pharylon wrote: post #257

Earlier quoted context omitted.

When I was young and my hearing was better, I think I had a slightly-better-than-normal upper end to my hearing. Often, I would hear CRTs whining that no one else did. I vividly remember when I realized it. One day in class we were watching a tape and the TV was whining the entire time. After the tape was over, the teacher started talking about what we'd seen, but didn't turn the TV off. I asked him to, because the s…

Same here! I remember waiting for a lift where my friends mother worked, a car rental place. I told her I could hear a TV on somewhere, and she insisted there was no TV nearby. I persisted, it was driving me nuts. Finally, she remembered the cupboard above our heads had a TV in it. She opened the cupboard, and low and behold, it was on, on mute. I felt like I belonged in the X-Men.

Lo and behold, oops

Re: Neighbor's house alarm triggers when I put my car in reverse

#288

Post by porsupah »

mikestew wrote: post #111
m52go wrote: post #47

Got a kick out of this gem from the reddit comments: > My S2000 car alarm would be set off whenever I microwaved blueberries. Some experimentation revealed it was anything with excess water. Buying a new microwave solved the issue but I don't like thinking about how poorly shielded the old microwave was. I tried moving the for further from the kitchen or keeping the keys far away to no avail.

I think a lot of microwave ovens are poorly shielded. I’ve seen more than one that will kill WiFi a room away, including the one in our house. As for the S2000, I guess water coincidentally changes the frequency of the leaked radio waves to match the car alarm?

Indeed. Several years ago, I was working on a 2.4GHz device, and we noticed that occasionally, the microwave in the office kitchen would disrupt things. A quick check with a 2.4GHz band spectrum analyser showed what was going on:

https://i.imgur.com/S1Luizd.jpg

The company being as cheap as it was, I simply began using the microwave as a deliberate noise source for testing the device's operation under adverse conditions, placing a few mugs of water in the microwave for a few minutes, and deliberately setting my channel to collide with the microwave.

Re: Neighbor's house alarm triggers when I put my car in reverse

#289

Post by marme »

Pharylon wrote: post #257
__david__ wrote: post #225

Earlier quoted context omitted.

My dog was similar, but the sound he triggered on was the CRT turning off. You could sit perfectly still and press the off button the remote (so as not to give any body language signs) and he'd wake up, and wander off to the bedroom for the night.

When I was young and my hearing was better, I think I had a slightly-better-than-normal upper end to my hearing. Often, I would hear CRTs whining that no one else did. I vividly remember when I realized it. One day in class we were watching a tape and the TV was whining the entire time. After the tape was over, the teacher started talking about what we'd seen, but didn't turn the TV off. I asked him to, because the s…

this noise is commonly referred to as coil whine and is made by any high voltage electrical component. The sound comes from the electron gun which has very high voltage passing through it. If you cant hear it you have hearing damage because most crts make the noise just on the edge of human hearing https://en.wikipedia.org/wiki/Electromagnetically_excited_ac...

Re: Neighbor's house alarm triggers when I put my car in reverse

#290

Post by jventura »

joeyspn wrote: post #70

Some time ago I posted a weird issue I noticed with my neighbour. HN solved the mistery in minutes... =) https://news.ycombinator.com/item?id=11935275

Yours remind me when I was also a radio aficionado many years ago, one night my upstairs neighbor called me because each time I pressed the button to talk, my voice would come out from her TV. I was basically ruining her favorite soap opera!
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