Hollow core doors are very popular coupled with the fact that they are cost effective and readily available in a wide variety of styles and shapes. They are the least expensive interior doors on the market.
These doors, just as the name implies, these are quite heavier and transmits less sound than their hollow counterparts
Solid Wood Doors - it's are wooden doors which are made from diverse species of wood such as alder, pine, or mahogany.
Examples of interior door types include; Bypass doors, Bi-fold Doors, French Doors, and Louvered Doors.