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- Ece 301 projects fall 2003
- Formant analysis and vowel
- Conclusions
Present project conclusions and improvements
Through formant analysis, we were able to successfully identify vowels in multi-syllabic words and short sentences. Formant analysis along with a match filter method to detect vowels proved to be effective, although a few problems were encountered. After this project experience, we can understand the complications inherent in any full speech recognition system.
Improvements
- The most immediately obvious improvement we could make would be to increase the vowel database. This would require much more intricate filtering and thresholding, but would ultimately make for a much more robust system.
- Another addition we could make would be support for multiple speakers. We would have to abandon our current method of absolute value thresholding and implement a system that utilized a formant ratio system, as the ratio between formants of a vowel sound is fairly consistent from speaker to speaker.
- Other improvements might be yielded by experimentation with the size of the window that we use to break our signal into chunks or by tinkering with the auto-regressive model. Early in our project we settled on the window size and auto-regressive model we would use in order to increase the focus of our project. It is possible that more effective results could be obtained with a different window size or an optimized auto-regressive model.
- Another obvious improvement would be to boost the sampling rate of the input signal. This would result in significantly higher resolution, and allow much more precise tracking of subtle nuances in the dynamic change of formants. This would also possibly allow the beginning of consonant detection (or at least classification) as our research has told us that by carefully tracking changes to vowel formant values just before and after a consonant sound reveals certain properties of the consonant.
- Even without the boost in frequency of the sampling rate, we could likely add detection for'R','L', and'S'consonant sounds. We found all three of these to have strong resonant frequencies ('R'and'L'as discussed in our problems section;'S'had defined formants at high frequencies).
References and acknowledgements
Digital Bubble Bath - 1996 Elec 431 Group
Dr. Baraniuk
Questions & Answers
how does Neisseria cause meningitis
is the branch of biology that deals with the study of microorganisms.
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
How bacteria create energy to survive?
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
which site have a normal flora
Many sites of the body have it
Skin
Nasal cavity
Oral cavity
Gastro intestinal tract
Safaa
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Binomial nomenclature
adeolu
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Source:
OpenStax, Ece 301 projects fall 2003. OpenStax CNX. Jan 22, 2004 Download for free at http://cnx.org/content/col10223/1.5
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