In the Original game, You can hear a Some whispering sound if you make a dizziness yourself until your vision becomes blurred.
The sound you hear when Hui-min feels dizzy is the one woman's plaintive voice.
The woman says, "누가 좀 도와주세요. (Somebody help me.)" And her words are heard overlapping some times.
In the game file, this sound file is named "패닉 (Panic)".