4) Sound Spectrgraph- is a combination of magnetic tape and frequency record with an analysis of the component frequencies of complex waves ,preserved as a permanent picture.
10)Passive organs of speech-The fixed speech organs with which the active organs form obstruction
5-Lecture
1)Combinatory- positional changes- These changes in pronunciation which depend on the way they influence one another
2)Assimilation-The process when the articulation of a sound under the influence of the articulation of a neighbouring sound
3) Adaptation- There are cases when the articulation of a consonant is modified under the influence of an adjacent vowel
4)Aspiration-is a slight puff of breath that is heard after the plosion of a voiceless plosive consonant before the beginning of the vowel immediately following