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  • Reviewed by NEWKQBASIC on Dec 07, 11:45am

    I could barely hear the 18 KHz at full volume, but it was really annoying and now my ears are ringing like crazy

  • Rated by xfx on May 06 2009, 12:31am

    hmmm... one question: who said that the average sound card and speakers will be able to reproduce sounds at those frequencies? I sampled the 18KHz and then applied a FFT over the sampled data and the resulting signal had so many harmonics that you could hardly tell it was a pure 18KHz tone. So, most of you that say that were able to hear the 18KHz tone you most likely simply heard the harmonic frequencies. So why does kids are able to hear these tones on their cell phones but not the teachers? Because of the distance between them -- high frequencies require a lot of energy to travel and decay very rapidly so the farthest the teacher is, the hardest will be for him/her to hear the cell phone's ring tone.

  • Reviewed by LibrarianOfBabel on Jan 25 2009, 11:41pm

    I hear them all plain as fucking day. Like ice picks digging into my brain through my ears.My ears have powers, clearly. Useless fucking powers!

  • Rated by TheWakeUpCall on Dec 27 2008, 6:20am

    Great, now I know my ears are dieing... I can't hear 16 or above! I'm only 18!

  • Rated by gazell on Nov 27 2008, 11:45am

    I heard them all. jumped over to audacity and could hare up to 20Khz at which point it can't generate a higher tone. What would be really neat is something that would let you listen to a sweeping tone and when you can hear it you hold down a button when you can't you let go. then it gives you a profile of what you can and can't hear.

  • Rated by allizilla on Nov 22 2008, 2:35pm

    I can hear the 18KHz but my mom can't even hear the 11 >.

  • Reviewed by xcrissxcrossx on Nov 21 2008, 11:57pm

    Playing Loud music without earplugs must have killed my hearing. I am 16 and I can't hear anything above 14 KHz