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Impulse sound tracker
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- Опубліковано 10 гру 2013
- people.ece.cornell.edu/land/co...
We designed and build a 2-dimentional Acoustic Impulse Marker system which is capable of detecting a sharp sound anywhere in its vicinity and precisely marking its source vector with a servo based pointer. Our system has a full 360 degree range, and is extremely effective at marking the source of sharp sounds to within 5 degrees of accuracy. We were able to accomplish this using a 3-microphone array and an ATmega1284p microcontroller which detects the acoustic delays between the microphones and calculates the sound's source vector. The microphone signals are passed through an 8 stage analog system in order to convert them to a binary signal, indicating when each of them is triggered by a sound. Those 3 binary signals are analyzed for their time delays and the microcontroller selects the best 2 microphones to calculate the exact angle in which the sound originated from. The servo motor is then controlled so that it turns a pointer exactly in that direction.
The military could use this to track shooters in a battlefield situation. I think I saw something similar used a few years ago in an article. Interesting project.
i was just thinking of such a project and ur projct gave me a path... thanks a lot.. i would try to improve something in this n will post it soon.. :)
Nice work!
Good!
What is the name of 180 degree-360 degree converter kit. Do you have the link?
The converter was designed and built by the students from the parts which are listed in the linked report.
With distance measurement, this could be a acoustic goniometer
my next proyect will be a 3D aiming sound tracker!
Cool, how did it go?
does anyone know how they translate the angle they calculate from the sides of triangle to the center of the triangle, so that the direction the servo points is actually accurate?
Did you read the linked report?
@@ece4760 yes i read the report, but the calculation of the angle from arcsin((deltaT * speed of sound)/distance between microphones) gives the angle from 90° of the face of the triangle between the two microphones used in the calculation, how is that angle relative to the center of the triangle (where the servo is pointing from)?
like if you calculate Θ to be 10° from the 90° axis on microphones AB, how does that correlate to the Θ of the servo (which is centered in the triangle)? I understand that you just narrow down the regions the angle could be in and then subtract/add theta from known angles on the circle to get an accurate direction, but theta is relative to the side of the triangle while the known angles are relative to the center?
@@johngrayo6808 Since their algo ensures that the sound direction is within 30 degrees of perpendicular to the face, and their accuracy is around 5-10 degrees, the difference is probably negligable. However, the report is the only source of documentation for this project, except for the source code, which you could examine.
Is there any circuit board sketch for it? We're looking at making a project
There are schematics and pictures of the circuit board in the linked report. The cpu board is described here: people.ece.cornell.edu/land/courses/ece4760/PIC32/target_board.html
Hello there, I'd like to buy your cool machine pre programed please.
I'm thinking about this unit to monitor my farm.
I'm thinking a lcd screen with a 360 degree type radar screen display and code would be a big advantage.
Thanks mate.
Andrew Nz
extraordinary project sir, i want to excited to do this project please can you give the code .please sir
Did you read the linked report?
is there any way to extend this for analyzing and detecting a specific sound in the array of sounds?
code that is not written can do anything. sure, you could use the rising edge to get the timing, then analyse the sound perhaps with an FFT to detect specific frequencies.
@@ece4760 what does the FFT stands for?
@@SerBond007 google is your friend. en.wikipedia.org/wiki/Fast_Fourier_transform#:~:text=A%20Fast%20Fourier%20Transform%20(FFT,frequency%20domain%20and%20vice%20versa.
Can this project be related to IMPULSIVE NOISE TRACKER IN POWER LINE COMMUNICATION (PLC) NETWORKS?
It is not related. This system is acoustic. PLC is electromagnetic.
@@ece4760 okay, thank you.
@@_mdaks_ add same formula with Auto correlation and cross correlation
what is the algorithm was used it to determine the time delay between signal?
did you read the report?
yes but Im not understand how the time delay between signals is calculated??
the time delay is not calculated, it is measured.
but are you asking about the interrupts that log the time?
wich sensor did you use ??
All the details are in the linked report. But just cheap microphones.
👍👍👍👏👏👏👏🖐️🖐️
Now attach a nerf onto that and you can enforce silence in the library the hard way
CPLD or FPGA woukd have been better chiice than a MCU
True, but this was a MCU class.
Did this ever get turned into a product I can buy? I want to get my hooligan neighbors for gang stocking and stick them in jail.
this was just a 5 week project. it was not a product.
Dude, you've posted this on multiple acoustic tracking projects. Just call the cops or move. What even is gang stocking?
No way, they're going to pay me dearly for what they've done. I will be rich off their backs.@@paulramasco6769