Study Of Tibetan Ando Dialect Speech Based On Airflow And Pressure Signals

This paper will with Tibetan consonants and vowels amdo dialect pronunciation as the research object,by the method of experimental phonetics,30 of the Tibetan consonants and four vowel at the top of his voice parameters such as pressure,flow and aerodynamic power value variation characteristics are analyzed.And studies the pronunciation mechanism of Tibetan alphabet from the Angle of airflow and pressure signal,and gives a detailed description of the basic vowel and consonant of Tibetan language in speech aerodynamics signal.First of all,by extracting the Tibetan all air pressure signal parameters of the four basic vowel,to observe vowel pronunciation signal parameters and their lips when the circular degree and the relationship between the tongue,and further to the vowel sound parameters makes an analysis on the influence of initial consonants.Found that the value of the fundamental frequency of vowels with vowel pronunciation when lips round exhibition degree is proportional to the sound pressure level and aerodynamic resistance is proportional to the tongue of the high and low,and breath flow is proportional to the vowel pronunciation when is narrow.The value of vowel base frequency is increased by the influence of consonant initials,while the sound pressure level is opposite.Secondly,based on the different of articulation of consonants airflow pressure signal is analyzed,in addition to lateral,tone and vibrato,all breathing sound length and aerodynamic power values are women more than men,and fricative and affricative breath flow and aerodynamic resistance value and are men more than women.The size of the air flow and the aerodynamic power value of the plug is proportional to the front and rear of the articulation.The length of the breath and the aerodynamic drag are inversely proportional to the position of the articulator,and the aerodynamic drag is proportional to that.The pressure value and the exhalation flow and the aerodynamic power are inversely proportional to the front and rear of the articulation,while the aerodynamic drag is proportional.All airflow pressure signal parameters are directly proportional to the front and back of the articulation.The influence of the consonant flow and the pressure signal parameters on the pronunciation area indicates that the airflow pressure signal with the same pronunciation is different from that of the pronunciation.Finally,the comparison of the air pressure signals of different "character" consonants from the "character" classification of Tibetan consonants indicates that the average pressure value is the largest neutral word,followed by the positive word and the least negative.Average power of aerodynamics and aerodynamic drag is the biggest positive word,followed by a neutral word,minimum negative word,especially belongs to pure nasal and lateral negative and negative minimum,differ with negative word value is bigger.Through these results,found that the aerodynamic power and aerodynamic resistance value seems to be the so-called "the intensity of sound" and weak points of the related,both the aerodynamic power and the aerodynamic resistance value is positive,the size of the second is neutral,negative minimum.And aerodynamic power is people pronounce with the gas energy into acoustic energy work quantities,illustrate that positive words in pronunciation will gas energy is converted to sound energy work quantity is big,the neutral word times,minimum negative word,and aerodynamic resistance is proportional to the aerodynamic power.This is a good reference for us to study and analyze the relationship between "sound potential" and strong and weak.