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A confusion matrix
A confusion matrix detailing the results of a testing run.

Confusion matrices are used to analyze the results of the full testing runs. A confusion matrix, also known as an error matrix, gives a visual representation of the performance of a learning algorithm--in our case, using scattering coefficients to train an SVM. Each entry in the matrix corresponds to the predicted accent versus the actual accent, with entries along the diagonal representing correctly predicted accents. While no column contained perfect classification accuracy, we were still able to correctly classify four out of five of the accents. We found that the overall accuracy of the confusion matrix was 50%, with a high misclassification of French as Spanish. We found an overall tendency for languages to be classified as Spanish, which we believe is due to the diversity of the Spanish accent sound samples. The accent database had fewer Spanish accent samples than the other four languages so the samples included speakers from many Spanish speaking countries. The diversity in the Spanish accent sound samples might have led to the high rates of misclassification as Spanish observed.

graph1
Results of tuning the parameters of the input data.

When tuning the input data parameters — the number of chunks and the length of each chunk — we found that, in general, having two total chunks resulted in the best performance. Furthermore, the system performed well when the total time of the sound analyzed — the length of each chunk times the number of chunks — was four seconds, a trend which is highlighted in red on the graph. We hypothesize that this occurs because the sound clips are relatively synchronized up until four seconds, with the pace of the speaker being increasingly significant afterwards. We applied these results to later tests by using a pair of two second chunks as the input data parameters.

Graph2
Results of tuning the parameters of the SVM.

Through testing combinations of box constraint and kernel scale parameters for linear, gaussian, and polynomial support vector machine models, we were able to determine the optimal parameters for classification accuracy. We found that the linear model produced far worse results than the gaussian and polynomial models and eliminated it from further analysis. The gaussian model had better overall accuracy compared to the polynomial model, so we chose our ideal testing parameters to be in the range of its lightest squares — corresponding to about 50% accuracy. These parameters were used to produce the confusion matrix seen earlier.

Questions & Answers

Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
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
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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Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
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Loga
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Source:  OpenStax, Elec 301 projects fall 2015. OpenStax CNX. Jan 04, 2016 Download for free at https://legacy.cnx.org/content/col11950/1.1
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