Mosquito Tone Test, or How To Tell You're A Young'un

Karen got me intrigued by a recent blog post in which she describes hearing KFC's strategically placed "mosquito tone" in one of their recent ads.
Now for those of you who don't follow pop culture and web trends, et. al, a "mosquito tone" is simply a 17KHz sine wave that geeky youngsters have been known to use on their cell phone to alert them when they've got a text message so the teachers can't hear it. See, studies say that most of us old folks (I'm over 30 now) can't hear much above the 13-14KHz range. (See the full chart of who can hear what.)
Of course, when someone says most people can't do [x], everyone tries it. Sort of like when I read the Snapple cap that said no one can lick their elbow. Now that's a conversation starter. Anyhow, I fired up Audacity and generated a 17kHz tone, and wouldn't you know--I couldn't hear it. So I bumped it down to 14kHz and heard it. At 15kHz, I could hear it so long as I didn't tilt my head funny. At 16kHz, I could still hear it, but it was really faint. Then I actually decided that I could only hear it if I knew it was playing, but I haven't been able to test that until I have someone else press play.
My wife just walked in for her middle-of-the-night stroll and screwed her face up funny when I played the 18KHz sound. Show off.
Here are the sounds for you to test yourself with (Ren suggests headphones for best results, best meaning you're still a young'un). They're all 5-second long, 431k .wav files:
InterAction:
26 April 20072. Jesse Gardner:
It's probably because of all that music Andy blasts at you. Those indie artists use the darndest frequencies.
26 April 20073. Matt:
I just turned 20, but can hear all of them. But I'm one of those guys who can hear when the TV is on in the other room because of the high electrical whine of the tubes. Though I bet in a year I won't be able to hear them.
26 April 20074. ren:
I posted my results on Karen's site, but I'll do it again. This is without the benefit of headphones (since I'm at work) so I get the excuse of noise pollution, right?
I can hear 15kHz just fine. I can hear 16kHz but only barely and with the volume up pretty high. It's more like I can feel that there is a sound than I can actually recognize the sound. I'm sure I wouldn't really notice it if I didn't know it were playing. I would probably just think my ears were being weird. Definitely can't hear the 17kHz at all. I guess we both have old ear, Bethy.
26 April 20075. Jesse Gardner:
Matt: I wonder what frequency the TV whines at. I can usually hear that, too.
26 April 20076. Karen:
I'm too scared to use earbuds to try it, because I get a headache just from long-term use anyway. But I could hear the first 4 clearly through my crappy macbook speakers. (and they really are terrible speakers) The next 2 were more pain than sound. The one on the tv commercial, though is loud and piercing to me. I wonder what KHz it is.
I think my hearing is still good because I was always forbidden to listen to loud or rock-and-roll type music. (aka "devil music")
26 April 20077. crystal:
I am 27 (Tim's almost a year younger) and we could hear the 18 really well (ouch!). I guess that's good since I spend all day with those teenagers trying to hide their cell phone sounds. Sound emitters are actually a part of Tim's new business, so he just pulled out a device with different sound frequencies. He could hear a little more than I could (about 22-23).
26 April 20078. Jill:
I could hear all of them but 18--that one I only heard the pop at the beginning, and my ears were kind of buzzing, but I couldn't say that I actually heard anything.
And I'm 29, rapidly heading to 30--just wanted to point that out. : )
27 April 20079. angela:
So is there a limit as to how high you can turn up the volume on your computer? Can hear the beginning and ending "clicks" for 17, but nothing for 18.
30 in October, but let's not talk about that one. ;)
27 April 200710. Sara:
That really is amazing! I think I'll link to this from my blog, if you don't mind. Easier that than retyping the whole thing! :-)
I could hear the 17 when I was looking at the computer (I wasn't using headphones)- but nothing if I turned my head to the side. I think the 18 one is just a trick- there's nothing really playing, is there??? ;-)
Man, going deaf already and I'm just a wee 24!
27 April 200711. amber:
heard the 18...
i'm 22.358904109589 years old today
28 April 200712. mandi:
heard 'em all. my question is the same as angela's, though. am i cheating if my speaker was turned all the way up? i'm 27 in august.
4 October 200714. Rebecca:
That's really weird. I always think of myself as having bad hearing (though admittedly that's because I don't pay much attention to anything) because people always sound like they're mumbling and I play music really loudly etc, but I found 18KHz to be quite loud, though not as uncomfortably piercing as the lower frequencies, and that was without headphones with my volume on 35%. My computer is quite slow so they had to take a few minutes to load before I could hear them, so I was doing other things, and each sound caught my attention really easily so I wouldn't describe them as faint at all. (This is coming from someone who never hears her mobile phone even when it's up really loud!) So yeah, I'm amazed that some people honestly can't hear anything when the 18 plays and some of you describe pain rather than sound toward the larger numbers - I found it the opposite - I thought 12 was horrible to listen to but 18 was quite reasonable - annoying but not painful!! In case you're interested, I'm 20 years and 5 months old.
23 October 200715. Ian:
I'm 34, and I can still hear the 18KHz just fine. Of course, as Matt mentioned, I can also hear power hums from TV's and other devices, which my 33 year old wife cannot. I haven't lost high freq hearing yet, but I have picked up tinnitus from several teen years of loud head-banging metal.
23 October 200716. Ian:
Just found another website (click my name to find it) that goes up to 20KHz. I can hear the 18KHz clear as day, the 19 is very faint, and I can just barely make out the 20KHz. I had to crank the volume *way* up to hear the 20KHz, and most of the way up to hear the 19KHz.
28 October 200717. Bradley:
Im 14 and could hear them all.but my aunt and grandma could hear them all to and my aunts 29 and grandmas older.But does it matter if the speakers all the way up because they were?
5 February 200818. Ethan:
I'm 16 almost 17 and I can hear all of them just fine...the lower frequency hurts my ears really bad and makes it really uncomfortable...hopefully I can keep my good hearing ^_^
13 February 200819. piker:
What?
15 February 200820. Alex Houston:
WooooooooooooooW i heard all of em but i only heard a faint 18 khz lol btw im 13 lol going on 14 in April so ya lol 11 is soooooo annoying xD but noone else in my family heard it lol thats fudged up xD
22 February 200821. Chris:
Hmm, they get progressively harder to hear, up to 16, which is very faint, but then suddenly on my PC 17 and 18 are easy to hear again. What's going on? Perhaps a problem with the computer not being able to play these high freqs?
24 February 200822. Jack:
u guys r making me feel bad... im 16 and on full volume i can hardly hear 18 id bet i couldnt hear 19...
5 March 200823. Ray:
I'm 39. For 10 years I was a piano tuner - I have trained hearing!
Like a few others, I can hear the whine of TV's and other electronic equipment and some florescent lamps too. I hear all the frequencies except 16kHz. There's something there, I just can't hear it!!! (My 12 year old son is amazed that he can hear 16kHz and I can't...) On another site I found 15.8 kHz and hear that just fine.
As far as some people reporting pain with some of the frequencies, I have found that different people hear certain frequencies differently - age is not necessarily a factor. Two people the same age can both hear the same frequency but one of them winces and the other looks at the first one wondering what's wrong. It's not something wrong with anyone's hearing, it's just differences in our ears.
The fact is that typically, younger people can hear a wider range of frequencies than older folks - especially the higher frequencies. And that's what the "Mosquito tone" is taking advantage of.
31 March 200824. Chance:
lol im 17 and i had the volume down to almost nothing and i could still hear the 18.
31 March 200825. Chance:
lol im 17 and i had the volume down to almost nothing and i could still hear the 18.
YourThoughts?
(Minutia)
This entry was written by Jesse on Thursday, April 26, 2007 at 1:14 AM and appears in the Ears chapter. The previous article was entitled, "Heroes: Discussion", and the next entry is called, "Majesty Snowbird". Bookmark the permalink, save it to del.icio.us or Digg it.
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26 April 20071. beth Martin:
The 15 was really loud, but I couldn't hear the 16 at all. weird. Liam said he could hear it when I asked, but he's only two, so he may not even have understood the question. I guess My ears aren't as young as I am.