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Author Topic: High volume sound to trigger a pre-recorded message/alarm  (Read 996 times)
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Hi everyone,

I am thinking if and how it is possible to make a project like this:

1. a higher than a certain lever of sound goes into a mic or other component.
2. Arduino recognizes high level and instantly plays a pre-recorded message through a speaker
(or if it is very very hard\time consuming then just playing any sound like alarm or anything)

from what I've found out after I've searched I figure the issue might be in the part of the recognition,
the speed it "hears" the environment and telling between peak sounds VS loud noise etc' ..

That it why I am asking here,
I will be glad if anyone could point me to a simple (more like of some soldering, some programming and "plug and play") solution (if exists)
and not electronics mathematical equations please  smiley-wink

Many thanks to the helpers..

Roy.
 



« Last Edit: May 20, 2012, 05:10:01 pm by RoyZ7 » Logged

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I seem to remember a recent thread about using Arduino to drive a graphic equaliser display, and that would give you the logic you need to detect the incoming sound level. I don't know whether you want to detect any particular type of sound or just trigger on a general 'loudness' - I suppose it would be possible to add an external band filter if you want to only detect sound in a particular frequency range. There is a shield which can be used to play pre-recorded samples, forget the supplier but it's been mentioned here in the past and I'm sure a Google search for Arduino sound shield would locate it for you.
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Thank you very much Peter,

you gave me the right direction for everything!

There are sound shields for incoming sound and spectrum analyzing like this one: http://bliptronics.com/item.aspx?ItemID=116
and there are sound shields for playing sounds like this one: http://www.ladyada.net/make/waveshield/

it looks like it could work together to me, just a noob question: can i have 2 shields one one Arduino?

Thanks,

Roy.
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Unfortunately the two shields don't seem to be compatible:

The audio spectrum analyzer shield uses pins 4 an 5 for triggering and reset as well as A0 and A1 for getting the values.

The wave shield seems to use pins 4 and 5 too according to the shield list:
http://shieldlist.org/adafruit/wave

One possibility is an go-between shield (http://www.sparkfun.com/products/11002) which is able to physically remap pins to other pins.
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Thanks for that info pylon! smiley
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