The sound that repels troublemakers

[anonymaus]

Please keep in mind while you're playing around with this:

a) digital compression on such sounds often means you're hearing audio artefacting rather than a pure tone, allowing you to "hear" a tone your ears can't perceive, which brings me to

b) it is probable that whatever speakers or headphones you possess are not audiophile grade and as such are likely incapable of reproducing sounds above 20Khz (the ultrasonic range): that is the most common upper frequency humans can hear and as such is the upper end of most reproduction equipment's frequency range.

If, on the other hand, you have some higher grade equipment and a tone generator (or lossless recording) you would be able to test this definitively.

[Psychonaut]

b) it is probable that whatever speakers or headphones you possess are not audiophile grade and as such are likely incapable of reproducing sounds above 20Khz (the ultrasonic range): that is the most common upper frequency humans can hear and as such is the upper end of most reproduction equipment's frequency range.

Bingo. I couldn't hear anything over 16.whatever kHz on my speakers here at home, but my annual audiogram tests say that I most definitely can hear above that.

[Beorn]

What's the frequency of the "anti under-age-25 crimefighting device"?

Unfortunately it does not state it on the article, but a quick look around for models in the same range say the frequency is 17.5 - 18.5 kHz.

[Vulpix]

If that's any indication, I can hear ultrasonic marten repellers no problem at a distance .

[Lenny]

If that's any indication, I can hear ultrasonic marten repellers no problem at a distance .

What's an Ultrasonic Marten Repeller??


...Please tell me it repels this guy

[Vulpix]

What's an Ultrasonic Marten Repeller??

Something like this:



For the purpose of keeping these....



...from chewing up wires in your car .

[Angharad]

I heard an annoying beep beep sound during the clip from the article, and I am fairly old. My computer is right now putting out a sound around 17 kHz which is really annoying that my boyfriend doesn't hear--he thinks I'm nuts (maybe I'll ask my rug-rat nephew if he can hear it).

I couldn't hear anything at all on the test over 20 kHz though it was really faint from 17 kHz+.

[Rainraven]

That would so work on me!

Not that I'm a trouble maker

I could just hear 18.8, what a darn horrible noise! But then I'm one of those people that can't stand irritating background noises. Be it dripping taps, ticking clocks or high pitched buzzes *shudders*

[HawkR]

I don't think this sound will be as scary or anoying enough to make everyone scatter, but what about the sound of the screaming guy next to you just getting shot in the leg, or the sound, if not the sight of a tanks coming in your direction?

Haven't got a comp here, just a docking station, will test when getting home though.

[Vargtand]

Haha I can only hear the 17.7KhZ and well I can almost make out the 18.8kHz but after that it is completely silent.