Alarm System Activated by Dog Bark

Hey friends i need help with a escolar project:

Here are the especifications:

I want to develop a mechatronic device able to discern between a dog barking and other sounds, to turn on a bulb of 127 Volts AC for 1 minute. The device will activate the focus when a time interval of 30 seconds or more 5 heard a barking guard dog type: German Shepherd, Doberman, Labrador or rothweiler.



The device must have a single power supply AC 127 V, and its dimensions are not greater than 30 cm long by 20 cm wide and 20 cm in height.



During operation, the device can't connected to a computer or any computer system, the device must be able to work independently to other computer equipment.

I hope you can help me, if you have a question, tell me.

i need a diagram to build the circuit.

THANKS

Mauk, with greatest respect and friendship, if you don't do your own schoolwork, you won't learn. You have been taught the principles in class to design this yourself. So read your textbooks, draw your circuit, do your planning, and then by all means show us the circuit and ask for comments.

Honestly, this is for your own good.

P.S. Just in case anyone wants to know, an escolar is:
Any of several perciform fish of the family Gempylida.

Define how well you have to recognize the barking.
Maybe by using a computer hooked up to a microphone and and just record all sounds in the area.
Then you can consider how powerfull uC you need.
Next step is the hardware. And mr Bushnell advice is excellent....
Good luck

Dear Frank Bunshnell i appreciate your coment and you're right, i have to do my own schoolwork, actually i have an ideas to build the circuit.

Cooming soon i will do test for a circuit that i have, only im asking for help, if anyone have the same problem o other things like that.

the bark is recognize by a microphone, but how i can recognize this sound than other sounds, i dont know like car sound, people talking high or other sound.

Actually i have this diagram to start build a test circuit, check it out.

Thats why you should use your computer record and check out the recorded data.
Identify The frequency, amplitude , how long the bark is.
Then try to make a simple algoritm to identify the bark.
I would use python as development software because it is free and powerful and easy to learn.
But maybe it is enough to record and analyze in a audio-program like Audacity.

That's really a prudent suggestion!!!

Thanks & Regards,
Sneha Sharma,
http://www.bergenindia.com

Another specification is what accuracy rate is required? That is, what percentage of false triggers or failure to trigger can be tolerated?

If 100% accuracy is required something along the line of voice recognition may be required. If (much) less than 100% accuracy is required something as simple as a sound level triggered one-shot could be a solution. The one-shot, or one-shots, are configured to trigger on a sound that is the duration of a dog bark but not on sounds with a longer or shorter duration. A false trigger could be obtained by an automobile horn of the correct duration but that is not a frequent sound, is it?

I know this is four years after Maulk originally raised the question, but has anyone developed this technology on a commercial basis? If so, I am very interested in purchasing a unit for my personal use. Thanks.