RE: noise indicator

[Peter Donnelly <skookum@xxxxxxxxxxxxx>]

Welcome to the list. You are the first member from Asia we have heard from, I believe.

I take it that you are developing a device that will show motorists how much noise they are making. Congratulations on your initiative.

Peter Donnelly
Right to Quiet Society
http://www.islandnet.com/~skookum/quiet/



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From: 	Lutfullah Kakakhel[SMTP:ncepc@paknet1.ptc.pk]
Reply To: 	quiet-list@igc.org
Sent: 	Saturday, August 02, 1997 2:56 AM
To: 	'quiet-list@igc.org'
Subject: 	noise indicator

Hello all,
I have just joined the list. For technical reasons i would not be able to
post frequently (service login problems). I have a problem in which i need
your help. If you realy want to listen to noise, come to Pakistan and
stand on the road for a while. I had no interest in noise but it
compelled me to look into this problem as an individual. To begin with i
thought may be if i could make a device which show the level of noise
these drivers generate on the road by blowing pressure horns and
accelerating without a silencer, it would help to some extent. That i am
trying now. I simply picked up a condenser mike attached it to an
amplifier and level meter and connected relays with the level meter which
triggers different colored lamps. Upon receiving a low noise the lower one
or two lamps glow and as the level increases, more lamps go on. I could
cover a range of 70-99 db with five lamps. 
The reason i am using lamps is that most of the drivers are not educated
and thus i have a very low cost locally fabricated noise indicator on the
road. I have tested a prototype and it seems to be working.
I would like to share with some other netter from a developing country who
has experience in such things or may be any concerned person. I do not
know much of electronics.

Lutfullah Kakakhel


 -------------------------------------------------------
National Centre of Excellence in Physical Chemistry,
University of Peshawar, NWFP, Peshawar 25120, Pakistan.
Phohne: 92-91-40480     Fax:92-91-843109 
ncepc@paknet1.ptc.pk
-------------------------------------------------------

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============================================================================
QUIET-LIST:   Internet Mail List and Forum for discussion of Noise Pollution,
Soundscape Awareness, and the Right to Quiet.     Email: "quiet-list@igc.org"
To subscribe, email "majordomo@igc.org" with message "subscribe quiet-list".
For info, send message "info quiet-list" to same.
=============================================================================