The speecharticulation is affected by the articulation loss of consonants which is impacted by the acoustic ratio of direct and reverberation sound.
直达声与混响声能比影响辅音清晰度损失率，从而影响语言清晰度。
2
Teaching of articulation, listening, speech-reading, spelling etc. which relevant to sound is in a very important position in the teaching in school for the deaf.