After going through this link, I came to a belief that sound genjutsu is far more superior to eye genjutsu.
After recalling the incident of the two Sage Toads' genjutsu and Kabuto's genjutsu, I felt that it was difficult for the Sharingan/Rinnegan users to concentrate on their battle.
So is my speculation true?
Some of the sound genjutsu techniques are listed here: