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High pitched noise on O Connell street

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    #32
    LionelNashe
    Registered Users Posts: 1,961 ✭✭✭LionelNashe


    papu wrote: »
    26, I can hear it loudly from across the road.

    Annoys me every time I walk by it

    Across O'Connell Street, with buses, taxis etc going by?


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    #33
    papu
    Registered Users Posts: 3,357 ✭✭✭papu


    LionelNashe wrote: »
    Across O'Connell Street, with buses, taxis etc going by?

    Yup, its a much higher frequency than all those sounds.
    High and low frequencies vibrations are detected by different part of the ears. Higher frequency waves also have more power, but less directional, sure if a bus or tree gets in the way I can't hear it, but I always walk on the opposite side of the street as I cant stand to walk on the side with the emitter. I wish they would get rid of it.


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    #34
    endacl
    Registered Users Posts: 22,306 ✭✭✭✭endacl


    me_irl wrote: »
    http://www.noiseaddicts.com/2011/06/mosquito-ringtones/

    ^ I'm under 35 and I can't hear the "39 and younger" 15kHz frequency! I blame my lack of foresight (well, now hindsight) to wear earplugs at all the metal gigs I've attended.

    I actually use the 8kHz frequency as my alarm tone... because I hate myself. :pac:
    I'm still hearing 17kHz (24 & Younger can hear). 44 next month. And metal gigs? These ol' ears survived everything McGonagle's could throw at them in the late 80s!
    Dramatik wrote: »
    I can clearly hear the sound in that video. must try it in real life next time I'm in the vicinity. I can also hear those ultrasonic anti-vermin alarms people plug in in their kitchens.

    Do I have a superpower? Am I High-Pitched Hearing Man?

    :D


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    #35
    4068ac1elhodqr
    Closed Accounts Posts: 9,586 ✭✭✭4068ac1elhodqr


    endacl wrote: »
    I can clearly hear the sound in that video. must try it in real life next time I'm in the vicinity. I can also hear those ultrasonic anti-vermin alarms people plug in in their kitchens.

    Do I have a superpower? Am I High-Pitched Hearing Man?
    :D

    If they're the 40kHz (40,000hz) that stop dustmites from replicating, then yes.

    Some of the mole repellents appear to go from 3-400hz and upwards which is normal range.

    Lower end bass sounds are more desired and mistakenly advertised on many (passive radiator) portable speakers as having 'great bass'. But will often fail to get below 80hz on these and max uppers at 20khz.

    I've studio monitors will say hello to 35hz and 22khz. Used to have woofer with 'subsonic' 30hz reflex switch. The Bösendorfer Imperial grand piano has special low black keys with F0 22hz, proper bass.

    Even deaf people enjoy bass through floor/air vibrations, whereas the mosquito device is likely only to cause pain and annoyance.


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