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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
A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what are the types of wave
Maurice
fine, how about you?
Mohammed
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
Who can show me the full solution in this problem?
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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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