The four noise sources hotels care about
Room-to-room noise (adjacent guest rooms): airborne isolation problem. Solved with MLV inside inter-room walls and door seals.
Corridor noise (people walking past, closing doors): both airborne and impact. Solved with corridor acoustic treatment plus better door seals and door-close mechanisms.
Elevator and mechanical noise: airborne and structural. Solved with mechanical isolation of equipment plus MLV/wadding inside walls adjacent to elevator shafts.
Street traffic noise: airborne. Solved with laminated glazing and MLV inside external walls.
Target STC for inter-guest walls
STC 50 for standard hotel-room partitions. Adequate for typical hotel operations; standard specification.
STC 55+ for premium and luxury properties where guest complaints must approach zero. Achievable with MLV inside a mass-air-mass drywall assembly.
STC 60+ for hotels with cinema, entertainment, or events adjacent to guest rooms. Cinema-grade construction.
The door — the weakest point
Standard hotel door: STC 25–30, undoing the effort of the STC 50 wall it sits in. Guests hear the corridor as if the door isn't there.
Solution: solid-core door with acoustic seals on all four edges (top, bottom, both sides). Automatic drop-seal on the bottom activates on close. Standard package upgrade — installs during any refurbishment.
Retrofit strategies for existing hotels
Full inter-room wall retrofit: expensive (₹15,000–₹25,000 per wall) but delivers full acoustic upgrade.
Door-seal-only retrofit: cheap (₹5,000 per room) and delivers the highest single ROI in guest complaints reduction. Every hotel should do this before considering anything else.
Corridor treatment (PET panels or carpet): moderate cost, moderate benefit. Reduces guest-perceived noise even without touching walls.
Guest bathroom acoustic considerations
The bathroom fan is often the loudest guest-room noise source. Silent-fan retrofits are cheap and deliver an immediate acoustic upgrade.
Water noise through walls is common — the pipes act as sound conductors between guest rooms. Isolating pipes with rubber sleeves and cavity-filling with MLV/wadding solves this.