Welcome Guest.   Make a donation to an author on the site August 27, 2014, 02:07:43 PM  *

Please login or register.
Or did you miss your validation email?


Login with username and password (forgot your password?)
Why not become a lifetime supporting member of the site with a one-time donation of any amount? Your donation entitles you to a ton of additional benefits, including access to exclusive discounts and downloads, the ability to enter monthly free software drawings, and a single non-expiring license key for all of our programs.


You must sign up here before you can post and access some areas of the site. Registration is totally free and confidential.
 
The N.A.N.Y. Challenge 2013! Download dozens of custom programs!
   
   Forum Home   Thread Marks Chat! Downloads Search Login Register  
Pages: [1]   Go Down
  Reply  |  New Topic  |  Print  
Author Topic: Mosquito tones  (Read 5733 times)
ljbirns
Charter Member
***
Posts: 229


see users location on a map View Profile Give some DonationCredits to this forum member
« on: June 14, 2006, 12:08:36 PM »

Did anyone see hear about this. High school kids are using high pitched ring tones in school ( where they are not supposed to have cell phones ) because the high pitch cannot be heard by older people.

here is the tone   >.http://graphics.nytimes.c...ion/20060610_RINGTONE.mp3

Works too.   I can't hear it but some of the younger folks at work CAN.

It supposedly started in England by shopkeepers to drive away young loiterers and no annoy their older customers.
From The New York Times

Lew
Logged

Lew
nudone
Cody's Creator
Columnist
***
Posts: 4,116



see users location on a map View Profile WWW Read user's biography. Give some DonationCredits to this forum member
« Reply #1 on: June 14, 2006, 12:33:59 PM »

i heard about this on BBC Radio 4 the other day i have to say i could hear the tone when they played it.

i can also hear the tone that is in the link that ljbirns has provided but it does sound of a slightly higher pitch than what i heard from my car speakers that i was using to listen to the radio broadcast.

i wonder how the tone is effected depending on the quality of the speaker and the volume it is set at.

oh, i'm 37 so i shouldn't be able to hear it. there were  plenty of people calling in to the radio show saying they could hear it also even though they were meant to be too old.

i am very surprised that the tone is meant to be outside the hearing range of anyone over 20 years old - maybe if you have the volume right down and use a poor set of speakers ???????????

i guess for all us old timers that can still hear it we can feel like we've got one up on those darn whipper snappers.
Logged
KenR
Super
Blogger
***
Posts: 825


View Profile Give some DonationCredits to this forum member
« Reply #2 on: June 14, 2006, 01:19:30 PM »

Hey Nudone,

As I'm sure we are ALL aware, it is normal for people (in other words average - some very little, some a lot) to lose the ability to hear very high frequencies as they age. However, I think the idea that there would be a marked dropoff from the time one is 20 to the time one is 40 is simply absurd.

KPR
Logged

Kenneth P. Reeder, Ph.D.
Clinical Psychologist
Jacksonville, North Carolina  28546
jgpaiva
Global Moderator
*****
Posts: 4,710



Artificial Idiocy

see users location on a map View Profile WWW Read user's biography. Give some DonationCredits to this forum member
« Reply #3 on: June 14, 2006, 01:44:38 PM »

I tested this a bit, and got to the conclusion it's too uncertain to actually be used.
When I can listen to it (i'm 21), my mother also can (she's 45). Another bad effect about it is that if i had a ringtone like this, i probably would go mad and knock the cell phone against a wall, as even my slow, low, not irritating ringtone drives me mad!
Logged

ljbirns
Charter Member
***
Posts: 229


see users location on a map View Profile Give some DonationCredits to this forum member
« Reply #4 on: June 14, 2006, 02:02:24 PM »

I'm 62. I could not hear it. The oldest in my office that could hear it ws  46.

Lew
Logged

Lew
mouser
First Author
Administrator
*****
Posts: 33,278



see users location on a map View Profile WWW Read user's biography. Give some DonationCredits to this forum member
« Reply #5 on: June 14, 2006, 02:16:45 PM »

i could hear it.. and i did not like it  Angry
sounded like my ear was broken.
Logged
Carol Haynes
Waffles for England (patent pending)
Global Moderator
*****
Posts: 7,952



see users location on a map View Profile WWW Give some DonationCredits to this forum member
« Reply #6 on: June 14, 2006, 02:22:05 PM »

I can hear it (and I am 48) but I wouldn't like to rely on hearing it for my telephone !!

The weirdest thing is the my house mains electric fuse tripped as I clicked play !!!

Good test for my UPS Wink
Logged

noth(a)nk.you
Charter Member
***
Posts: 78


More than meets the eye.

View Profile Give some DonationCredits to this forum member
« Reply #7 on: June 14, 2006, 05:29:32 PM »

The paper here featured a similar article (syndicated from Paul Vitello, NYTimes).  According to him, the frequency of annoyance is 17 kHz. 

I used Audacity to create the tone on my laptop, but the speakers couldn't produce it.  The home stereo speakers, however, played a burned .wav wonderfully.  At least, so I am told.

I couldn't hear it myself (age 20), but my brother (age 19) reported immediate annoyance.  Turning the volume up to about 20%, I heard a tone pretty well, but I expect that the speakers just couldn't handle the high frequency at that amplitude and "dumbed it down."

Could perhaps a similar "dumbing" effect be in place when
  • compressing to .mp3
  • broadcasting over radio
  • both

Perhaps this could rationalize my hearing loss!
Logged
Edvard
Coding Snacks Author
Charter Honorary Member
***
Posts: 2,532



View Profile Give some DonationCredits to this forum member
« Reply #8 on: June 15, 2006, 01:04:31 PM »

Yes this could be the mp3/cd encoding. There are a lot of complicating things going on in the upper end of digital music which is where DVD audio wins. That is 24 bit and 96 kHz sample rate which is high enough to translate the upper range of audible material accurately. (human hearing in the extreme tops out at around 20 kHz) standard cd audio is 16 bit 44.1 kHz, so in the upper range, you get artifacts especially with mp3's you start hearing artifacts.
That's also why all the serious audio guys I know don't use Sound Blasters. They are tuned for mp3 playback. Waaaay lowpassed. My guess is the Mosquito ringtone is a pure signal (square wave at 17 kHz) so all the more annoying and no audio processing in the way...
Logged

All children left unattended will be given a mocha and a puppy.
Carol Haynes
Waffles for England (patent pending)
Global Moderator
*****
Posts: 7,952



see users location on a map View Profile WWW Give some DonationCredits to this forum member
« Reply #9 on: June 15, 2006, 01:44:26 PM »

I have an Audigy and I can hear it ...
Logged

nudone
Cody's Creator
Columnist
***
Posts: 4,116



see users location on a map View Profile WWW Read user's biography. Give some DonationCredits to this forum member
« Reply #10 on: June 15, 2006, 02:20:47 PM »

i've an audigy also and i can hear it (as i mentioned above). i thought all pc sound cards would go up to about 20 kHz - i've not checked the numbers but 20 or 22 doesn't seem too unreasonable. maybe i'm living in a fantasty land.
Logged
jdd
Charter Member
***
Posts: 214


see users location on a map View Profile Give some DonationCredits to this forum member
« Reply #11 on: June 15, 2006, 05:36:36 PM »

it used to be that you were only as old as you feel.   Now, your're only as old as what you can hear.
Logged
Carol Haynes
Waffles for England (patent pending)
Global Moderator
*****
Posts: 7,952



see users location on a map View Profile WWW Give some DonationCredits to this forum member
« Reply #12 on: June 15, 2006, 06:18:26 PM »

I think it should be 'you are as old as you see' ... I seem to spend 50% of my time taking my glasses off and putting them on again!
Logged

Pages: [1]   Go Up
  Reply  |  New Topic  |  Print  
 
Jump to:  
   Forum Home   Thread Marks Chat! Downloads Search Login Register  

DonationCoder.com | About Us
DonationCoder.com Forum | Powered by SMF
[ Page time: 0.063s | Server load: 0.36 ]