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  1. baludoy's Avatar
    baludoy
    baludoy is offline nag-memeron
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    June 2nd, 2014 04:52 PM #1


    so ilan taon na?

    p.s. not sure how accurate the test is so pls take-in the results w/ a wee bit of salt
    Last edited by baludoy; June 2nd, 2014 at 05:22 PM.
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  2. pyramid00
    pyramid00 is offline BANNED BANNED BANNED
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    March 27th, 2017 08:46 AM #2
    Just ested my ears with a signal generator, frequency counter and audio amplifier. The results are: 35hz - 11.5khz. "Normal' ears could hear from 20hz to 20 khz. Below 20hz, some people could 'feel' 14hz and some children could hear up to 30khz!

    Pest control devices' freqs: 22khz - 25khz for dogs and cats; 38khz - 44khz for mosquitoes, fleas, house fly, spiders, cockroaches; 52khz - 60khz for lizards; 60khz - 72khz for rats. Some manufacturers use 28khz - 30khz for cockroach, moles, mice, rats; 31khz - 40khz fr bees, katytids. wasps, hornets; 40khz - 75khz for moths and butterflies; 75khz - 80khz for mosquitoes, rats. In my experiments, I swept the freq 30khz - 80khz with 100db piezo. It is supposed to drive away mosquitoes within 2000 sq ft. The result? visibly LESS mosquitoes and a terrible headache! Imo, those pest repellers on TV are scams; they may be effective if they have a new technology.
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hearing test: How old are your ears?