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We organized our code into one main function that handles all of the SVM classifications, and a helper function that takes as input a folder of audio files and spits out the vectorized scattering coefficients for each one, stacked on top of each other in one big matrix that we can feed into the SVM. The function also takes in parameters that determine the number of chunks we split each file into and the length of each chunk, as well as some other inputs for selecting the right files from the right folder. The main function first calls this helper function on all of our accents (training and testing data) to generate all of the scattering coefficients. We then loop through all 10 pairs of accents and create 10 SVMs from their respective training matrices; the testing matrices are stacked together into one big matrix. Each SVM takes two parameters in its construction - a box constraint and a kernel scale, as well as an option for kernel function. These parameters basically tune the SVM to better categorize the specific types of vector it is given. The main function then tests these SVMs with the testing matrix, looping through each SVM and adding up the scores of the winner of each pair, then picking the accent with the highest total. Chunks from the same testing file are added to the same running total, so that one decision is made per audio file. We now have a list of guesses for each audio file, and we know what accent each file actually is. The main function organizes this data into a confusion matrix, and computes the total accuracy and the accuracy of the worst-classified accent.

Optimization

To fine tune our system, we ran large chunks of our code with varied parameters to determine what parameters make our system the best at classifying audio files. First, we tuned the input to our scattering networks by varying the number of chunks we split each of our files into and the length of each chunk. We ran our entire program with 1,2,3, and 4 chunks, and between 1 and 7 seconds per chunk (excluding values that exceed the file length). We used a gaussian kernel for our SVM with the default parameters for this step. Our results showed high accuracies when we broke our signal into two chunks, and also when the total length equaled four seconds. Based off of this, we picked two chunks of two seconds each to compute our optimized scattering coefficients. We then ran these optimized coefficients through the rest of our system, this time varying the two parameters for our SVM - kernel scale and box constraint, as well as trying gaussian, polynomial, and linear kernels. We chose a gaussian kernel with parameters that yielded a high total accuracy and a high accuracy of the worst classified accent.

The code used for optimization be viewed here .

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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Source:  OpenStax, Accent classification using scattering coefficients. OpenStax CNX. Dec 16, 2015 Download for free at http://legacy.cnx.org/content/col11938/1.3
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