Hey, am new to the boards,
I have registered as i need help with my college project.
I have chosen to design and build a noise detection system.
This is my Brief ::
A noise level indicator is required which will detect environmental noise and produce a warning output when excessive noise levels are reached and breached.

The indicator must run off standard 230v 50Hz and have protection to prevent surges of electricity.
Sound levels will be measured in decibels and the output will be visual signs.
The Indicator must be built robustly with an indication of when it is live.
Suitable protection from certain environments must be provided.
A working product must be available by October 2005

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The project is based on the soundear2000, shown here: http://www.soundear.dk/soundear_2000.asp?l=2&mnID=722

I am doing an offshore course therefore i have very little knowledge of electronics and do not know how to build this circuit.

Any help from you people would be great.

Many thanks in advance.

 

You could probably just amplify a signal, filter it an use a comparator to compare it to a set level. When it reaches that level it could set of some sort of alarm or just a relay for general use maybe...

P.S.: This is where you put finished projects, this should go into "Electronic Projects Design/Ideas/Reviews"!!

 

I just read it again... you need a sort of led bar dB indicator... like a VU meter look around the net youll find lots of stuff...

 

Moved by Moderator.

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