|
|
Posted by David McCall on 06/13/06 21:20
It isn't so much us oldies not being able to hear high frequencies,
it is that younger people can hear them better.
We lose sensitivity in the upper frequencies making really high pitched
sounds less clear. In my case, I think it might be made worse by the
ringing in my ears that drowns out a lot of high frequency information.
David
"Frank" <frank@nojunkmail.humanvalues.net> wrote in message
news:e89u82hnk75glnf3a16qhib0les1egr36g@4ax.com...
> On Tue, 13 Jun 2006 14:24:49 -0500, in 'rec.video.production',
> in article <Re: Need tone generator . . .>,
> "Steve King" <steveSPAMBLOCK@stevekingSPAMBLOCK.net> wrote:
>
>>"Neil Smith [MVP Digital Media]" <neil@nospam.com> wrote in message
>>news:1ett82hmijol7e0m8s1imnla2hr08h6rgq@4ax.com...
>>> On Mon, 12 Jun 2006 21:11:48 GMT, "Steve Guidry"
>>> <steveguidry1@earthlink.net> wrote:
>>>
>>>>Not a broadcast 1khz tone generator. I've got one of those . . .
>>>>
>>>>I need one that will generate an 18khz pulsating tone, ala the
>>>>"mosquito"
>>>>device that's so popular with Welsh shopkeepers.
>>>>
>>>>Any ideas on where I can get one of those ?
>>>
>>> TheRegister story today has a link to the BBC website which has an MP3
>>> http://www.theregister.co.uk/2006/06/12/ringtone_adults_cannot_hear/
>>>
>>> Cheers - Neil
>>> ------------------------------------------------
>>> Digital Media MVP : 2004-2006
>>> http://mvp.support.microsoft.com/mvpfaqs
>>
>>It appears to be a 15 kHz tone modulated +/- 150 Hz at a rate of 1 kHz. I
>>was amazed that I could hear it just fine with monitors at normal level.
>>
>>Steve King
>
>
> Just for the record, the audio file linked to from The Register
> article, although having a .mp3 extension, isn't actually MPEG Layer 3
> encoded.
>
> It's actually an MPEG-1 Layer 2 file and should really have a .mp2
> extension.
>
> I think that the fundamental is higher than 15 kHz though; perhaps
> more in the neighborhood of 16 kHz, but I don't have the time for a
> more thorough analysis.
>
> Like Steve, I too was able to hear it using just my usual setup of JBL
> monitors driven by a Crown amp, let along through electrostatic
> headphones, and I'm not exactly a spring chicken any longer. :)
>
> --
> Frank, Independent Consultant, New York, NY
> [Please remove 'nojunkmail.' from address to reply via e-mail.]
> Read Frank's thoughts on HDV at http://www.humanvalues.net/hdv/
Navigation:
[Reply to this message]
|