The sound insulation level of KTV usually depends on its design and the sound insulation materials used. Here are some key points to help you understand the sound insulation effect of KTV:

1. Sound insulation standards
The sound insulation level of KTV is generally between 40-60 decibels, depending on the structure and sound insulation measures of the room. The national standard requires KTV to have a minimum sound insulation level of 45 decibels to reduce noise interference to the surrounding environment.

2. Soundproofing materials
-Wall sound insulation: Materials such as sound insulation panels, sound-absorbing cotton, or gypsum boards are usually used, and the thickness and material density of the wall directly affect the sound insulation effect.
-Door and window sound insulation: Double layered glass windows or soundproof doors are used, and sealing strips are installed to reduce sound leakage.
-Ceiling and floor: Install soundproofing pads or use suspended ceilings to reduce sound transmission between upper and lower floors.

3. Sound insulation design
-Room layout: KTV rooms should avoid sharing walls and adopt independent partition design.
-Ventilation system: Use low-noise ventilation equipment and install mufflers in the ventilation ducts.

4. Actual effect
Under good sound insulation design, the impact of high volume music inside KTV on the external environment can be significantly reduced, but it is still difficult to completely isolate the sound.

If you need more specific sound insulation solutions or evaluations, it is recommended to consult a professional acoustic design team.