Difference of STC (dB)
Teach you to better understand the difference between different soundproof decibel data.
♥25dB Normal speech can be easil understood
♥30dB Normal sceech is audible but cannot be understood
♥35dB Loud speech can be understood
♥40dB Loud speech is audible. but unintelligible.
♥45dB Loud speech is barely audible
♥50dB Shouting is barely audible
♥55dB Shouting is inaudible
Inside the movable partition