NEW: Can someone please help: I need a sound detector mounted with a woofer

Hello everybody,

Can you help with my project?

If it may be of interest to anyone, I will tell you in a few words on why I need such a montage. I have been living in a caribbean island for some 5 years and, like all over the country. 2-3 times a week, we have below our windows some vehicules ( cars , 4x4 ) coming around and put on some loud music until 2- 3 or 4 in the morning . After complaining, with all our neighbors, to the local authorities, nothing has changed, it is time to try something diferent.

THE PROJECT is to build a montage that detects when the "music" reaches 80-90 decibels ( 70 are the oficial limite) and sends back a "noise" like 10 dcb higher than the original disturbing one! That may have to go up to 100 or 110 decibels ( wich is as high as my Ipad sound detector goes) Of course, we stop emiting the "noise" as soon as the music stops.

Thanks in advance for any help, I will greatly apreciate it.

Well, microphone into ADC to sample level is that is needed on input side. Need a big amplifier to output that much power back out. Have to stop sending and sample periodically to detect if input is stopped. What frequency where you thinking of sending back at them?

If it was me I would build a foghorn that depending on the time and decibels would trigger :)

But really, adafruit does a good microphone and breakout board that could easily be connected to an Arduino and programmed to work with this. I would get a normal speaker set up and just leave it plugged in in the right direction, and have the Arduino control when the music or whatever turns on/off

Good Luck :)

Thanks a lot to you for taking the time! Well, I am not a specialist on sounds, but my idea is to send something like a" feedback effect" or anything that would be so annoying that they have to leave or lower their volume. Ideal, would be a device that switches off as soon as the " music" stops or goes down in volume

Ideal, would be a device that switches off as soon as the " music" stops or goes down in volume

The microphone would also "hear" whatever noise your speaker is making, so that might be difficult.

The microphone would also "hear" whatever noise your speaker is making, so that might be difficult.

Even if we use any specific frequency as p.e. 1 kz? And "filter" it?( So that our mic would not detect it)

Of course you can filter, but that is just part of the difficulty.