How to effectively counter the noise upstairs

To reduce the noise upstairs, a floating sound insulation and damping layer can be built upstairs, which can effectively reduce the sound of ground impact and air echo. Some domestic real estate developers have done a good job of floor sound insulation in the construction stage; Do soundproof ceiling at home, use keel overhead, use materials such as sound-absorbing cotton, sound-insulating felt or sound-insulating board to reduce the sound shell radiated downward by upstairs noise.