Are hotel rooms soundproof?

Are hotel rooms soundproof?

Walls in hotel rooms and apartments are not designed to be soundproof. Depending on the type of building and age, the materials used will determine how much of a soundproof barrier there will be.

Soundproof walls DO exist but they require extra insulation and/or two layers of sheetrock.
Hotel and apartments rarely make that kind of monetary commitment. So that gives the answer to whether hotel rooms are soundproof – No.

Actually, it should be soundproofed, to ensure the comfort of guests. According to generally accepted industry standards, the noise levels in the bedroom, measured at pillow level with the door closed and no appliances turned on, should not exceed 30–35 decibels.
However, unfortunately, not all hotels have good soundproofing. My advice is to check the reviews from other guests before making a reservation, and do try to stay in reputable establishments only.