A wall is a good conductor of sound. If it's not mice or termites, then the sound source has spread to your wall from other places. It may also be a physical phenomenon that the wall absorbs heat during the day and acts at night, so you can take a good look.

Does it sound like marbles? Some people say that it is caused by cold stress and heat shrinkage, while others say that it is caused by mold. In fact, it is structural sound transmission. It mainly spreads the noise of floors and floors through walls and building structures. No matter how many floors you add, he can pass it on.

brick wall

Bricks are characterized by small block size, and their compressive strength is much greater than tensile strength, torsional strength and shear strength. The size of China standard clay brick is 240×115× 53mm.

The purpose of this dimension is to ensure that the length-width-height ratio of brick is 4:2: 1 (including the width of mortar joint 10mm). The thickness of a brick wall is usually called the multiple of the brick. Because the length of brick is 240mm, a brick-thick wall is also called "24" wall, a brick-half thick wall is also called "37" wall, and a half-brick thick wall is also called "12" wall.