The interaction of sound with glass and walls can vary due to their different properties and structural compositions. Here's a general explanation of how sound interacts with these surfaces:
Glass:
Reflection: When sound waves encounter a glass surface, a portion of the sound is reflected back into the surrounding environment. The amount of reflection depends on the angle of incidence and the nature of the glass surface. Smooth glass surfaces tend to reflect more sound than rough or textured glass surfaces.
Transmission: Glass is a relatively dense material, and therefore, it can efficiently transmit sound waves. This means that a significant portion of the sound can pass through the glass and continue propagating on the other side. However, the transmission of sound through glass can be reduced by using thicker or laminated glass, which helps to attenuate the sound waves.
Absorption: Glass is not a great absorber of sound. It reflects and transmits sound more readily than it absorbs it. However, some sound energy can be absorbed by the glass, especially if it has any coatings or films applied to its surface.
Walls:
Reflection: Similar to glass, walls reflect a portion of the sound waves that strike them. The extent of reflection depends on the surface texture, material, and angle of incidence. Smooth, hard walls, such as those made of concrete or plaster, tend to reflect more sound than textured or soft surfaces.
Transmission: Solid walls can block or attenuate sound transmission to a greater extent compared to glass. The denser and thicker the wall material, the better it can impede sound transmission. However, sound can still pass through walls, particularly if they have cracks, gaps, or are made of less dense materials like drywall.
Absorption: Walls can absorb and dissipate sound energy to some degree, especially if they are covered with sound-absorbing materials such as acoustic panels, foam, or fabric. These materials help to reduce sound reflections and reverberations within a room.
It's important to note that the specific properties of glass or wall surfaces, such as thickness, texture, and any additional treatments or materials, can significantly affect the interaction of sound.