NOISE DETECTOR WITH VOICE WARNING OUTPUT

hello im new with arduino i just want to know if it is possible to connect a mic on arduino and it as a noise sensor then when a noise is detected it will send a voice warning via speaker.. TIA

just want to know if it is possible to connect a mic on arduino

Yes, it is.

nd it as a noise sensor

No. When you read an analog pin, with a microphone attached to it, you get a rather useless value. From that one value, you can not determine frequency, pitch, volume, or much of anything useful.

when a noise is detected it will send a voice warning via speaker

You can get that there was, or was not, sound. No sound corresponds to a very small value. But, you'll have an extremely difficult time correlating the reading you get with a volume, so a whisper is as good as a shout.

can i use this diagram to adjust the sensitivity of the my electret mic so that it can be a noise detector.. im planning on using it to our school's library

or im planning to use the schematic diagram which i get from

http://www.learningaboutelectronics.com/Articles/Sound-detector-circuit.php

you could buy a premade mic/amp - see http://www.digikey.co.uk/product-detail/en/1713/1528-1028-ND/4990777?WT.mc_id=IQ_7628_G_pla4990777&wt.src

Allan.

@negative004, do not cross-post. Other thread removed.

sorry but how am i going to delete the 1st post?

Are you asking how to delete this thread?

Stop cross-posting.