中文摘要：

隐性标调是现行盲文不占方的标调方式，能够兼顾准确性和简洁性。在符合隐性标调基本条件的范围内，可以按照对优选条件符合度的高低优选隐性标调的音节（词）。现行盲文隐性标调应当以省方效率高的单音节为主体，以符合盲人阅读习惯或易读易记的单音节为辅，再以少量直接规定的多音节隐性标调定型词为补充。隐性标调后现行盲文的触觉品质不应降低。优选出的单音节（词）的省方总效率为32．83％，多音节词的省方总效率仅有4．34％。

英文摘要：

Hidden tone, a non-cell tone indication, can be both precise and concise. Where the basic conditions are met in hidden tones, syllables （words） in hidden tones can be first selected in compliance with the rules for optimization. The hidden tones for current Chinese Braille should focus on monosyllables with high cell-saving efficiency, supplemented by monosyllables easy for the blind to read and memorize, as well as a small number of polysyllabic words in hidden tones. But the optimized hidden tones should not decrease the tactile quality of current Chinese Braille.