The Mosquito... I want it banned

Forums › Gadgets, robotics, home automation, electronics (including wearables) › The Mosquito... I want it banned

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MichaelNZ

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#806968 28-Apr-2013 22:57

"According to Welsh inventor, Ig Nobel Prize winner for Peace Howard Stapleton, the tones can only reliably be heard by people younger than 20 and almost never heard by people older than 30."
http://www.teenbuzz.org/about-mosquito-ringtones.html

Bollocks! I'm 33 and can easily hear the 17.4KHz tone.

In another online test I can hear from 30Hz (Clearly 40Hz) to at least 20KHz, which was the highest the test would go.

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mckenndk

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#806970 28-Apr-2013 23:06

When I was over in the UK last year there was a big thing about this on the news people using it to stop young people loitering around their shops etc.

Some places turned them off after it was on the news, I just turn off the hearing aids problem solved.

Dion

Niel

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#807022 29-Apr-2013 07:15

What do you guys use to test your hearing frequency range? I use calibrated hearing test equipment that our company nurse provides, anything else is mostly useless due to poor frequency response and resonances and harmonics. 20kHz is far beyond normal audio range, so speakers are not designed to operate there and usually it is a harmonic/resonance you hear, not the actual tone.

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MikeB4

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#807027 29-Apr-2013 07:38

The use of these devices as described would be contrary to section 25(c) and sections 16, 17, and 18(1) of the Bill of Rights Act 1990

Niel

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#807579 29-Apr-2013 17:32

1990 is a long time ago when kids were disciplined through other means, this kind of device was not needed under the Bill of Rights.

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Linuxluver

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#808009 30-Apr-2013 14:25

Lias:
Ragnor:
Zeon: Omg at this in the comments... HAHAHAHA

"So when can we start making dubstep in cars compulsory to get the old people off my roads?!"

I just read that one and lol'd too!

Hah! This old fogie likes dubstep, that'll farkem.

Same. Dubstep is can be really good.

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Skolink

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#808256 30-Apr-2013 21:03

Linuxluver: Same. Dubstep is can be really good.

That was really cool. Surreal in parts.

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gzt

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#812585 7-May-2013 10:20

LostBoyNZ: I'm 31 and can hear 18 kHz at the volume level I'd normally listen to music, but if I turn the volume up a bit I can easily hear 22 kHz. Should volume have much of an effect?

Frequency response in audio equipment is never flat. Typically the response drops off (less output) at the higher frequency and lower frequency ends, therefore increasing the volume can increase the absolute presence of things you would not ordinarily hear.

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