Echoes most often occur in large rooms with large, flat surfaces and bare walls and ceilings. A similar effect can be observed in some living rooms. You can get rid of it in several ways.
Walls and floors
The first thing you need to pay attention to is the covering of the walls and floors of the room. If they are devoid of any finish, a rolling echo is almost inevitable. To get rid of echoes, you can use soft carpets. They soften the surface and absorb sound. To maximize the effect of carpets, try to choose models with a long pile. The most preferred option would be to cover the entire floor. However, if this method seems too expensive to you, you can limit yourself to small rugs.
Walls that are not covered also cause echoes. Use soft wallpaper or fabric coverings to cover them. Try not to hang large paintings on the walls, they create hard surfaces that can cause problems. If you are using pendant electronics, such as a TV, mounted on an arm, place thick and soft panels, such as velvet, underneath. Such panels will absorb sounds and prevent the appearance of echoes.
Large windows can be another reason for echoes in a room. Try to cover your windows with something. For this, use, for example, velvet curtains that cover the entire window and hang down to the floor. You can also use fabric decorative items such as a tabernacle or eyelet.
Furniture and accessories
A good way to get rid of echoes in the room is to use tall bookcases filled with various accessories. This helps to diffuse the sound and prevent it from reflecting. Try to fill such a closet with books, they will significantly reduce the likelihood of echoes.
A large amount of upholstered furniture also helps to cope with this problem. Try to furnish the room with sofas and soft fabric chairs, chairs with soft fabric backs, large floor cushions, and various accessories (such as stuffed animals). Try to avoid upholstered furniture made from leather and wood or vinyl coverings. These materials absorb sound worse than fabric.
Conventional wall coverings, be it soft wallpaper or fabric, may not work as expected. In this case, you can use special acoustic panels to combat sound reflections. Such panels can be made from a wide variety of materials, for example, foam or foam rubber. They often have a grooved surface that improves their performance. Acoustic panels are usually supplied in the form of small rectangular slabs and can be installed independently.