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Hi all,
I obtained amplitude vs frequency of my signal. After plotting the fft I want to calculate the energy of specific bands (The integral of the area under the curve.) But FFT is discrete.. Also when I zoom in specific frequency for ins 50 Hz, I see a curve as it was continuous. That...
Fs is 25600Hz
There is no consistency for the time delay. Recordings I have are randomly recorded samples.
AtoD is 8 bits
Type of sensor is accelerometer
Motor vib speed is 9200 rpm and it slightly changes over time. lets say btw 9180-9280 rpm
I didnt apply any windowing data.
I have given only...
Hi all,
I have 800 vectors having 765440 points of each. I need perform fft on all of those vectors and get the powers (Actually I need to plot all of those fft plots in one figure). But I am getting an OUT OF MEMORY error. Fs equals to 25600 Hz.
Power vector that I get for each vector...
I am collecting data into two folders. One of these folders contains 60 excel files with vibration test data from the motor when new bearings were installed. These 60 files were collected over a period of one day and have time stamps. The other of these two folders has ~1000 excel files for two...
Hi all,
I have some audio test files in wav format. Each of the wav file contains one signal. I cleaned my signals with preprocessing but it is not cleaned 100%, of course. Lets talk on one audio wav file.
If that wav file is 3 seconds and the real signal is only 1 sec, somewhere in the...
Hi all,
Does anyone know how to map mfcc matrices to fixed domain?
Lets say I have my mfcc matrices: 9x20 and 9x15. How can I fix both of them to 9xN? should I have to youse pca?
Thank you in advance
Hi all,
I have a question about HMM. I am doing a bird sound recognition project. For the database, I have extracted the MFCC features for each bird. Now I have to estimate the HMM parameters. How can I do it? \lambda =(\pi ,A,B)
https://www.wpi.edu/Pubs/E-project/Available/E-project-042910-001603/unrestricted/Bird_Call_Identification_MQP_2010.pdf
you can check the C code starting from page 87
Hi all,
I have to do feature extraction by using MFCC for my wav. data. But I am stuck at the beginning:cry: My questions would be silly and I apologize at the beginning for that.
So firstly I want to do frame blocking and then for each frame i will apply hamming window. I dont know about the...
Thank you! i was searching the pic18f4550 it has a usb module. So i have to buy the usb seperately? and should i buy and use the pic18f4550 development board
I am involved with a project, voice recognition, with FOUR microphones.
I'm using the microphone UEM-88 which has a 5mW output level at earphone.
I want to use a microcontroller with A/D convertes for data acquisition with usb interface.
It should have a support for programming with C or...
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