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ACOUSTICAL SEALANT CHOICES
AIR BYPASS LEAKS
AIR LEAK SEALING PROCEDURE
AIR TEST FOR MOLD: ACCURACY
ALLERGEN TESTS for buildings
ALLERGENS in BUILDINGS, RECOGNIZING
ANIMAL ALLERGENS / PET DANDER
ANIMAL ENTRY POINTS in buildings
APPLIANCE EFFICIENCY RATINGS
BLOWER DOORS & AIR INFILTRATION
BLOWER FAN CONTINUOUS OPERATION
BLOWER FAN OPERATION & TESTING
BUCKLED FOUNDATIONS due to INSULATION?
BUILDING NOISE DIAGNOSIS & CURE
CARPET PADDING ASBESTOS, MOLD, ODORS
CARPETING, SELECTION & INSTALLATION
CATHEDRAL CEILING VENTILATION
CHIMNEY INSPECTION DIAGNOSIS & REPAIR
COMBUSTION AIR for TIGHT buildings
DIRECTORY of MOLD / ENVIRONMENTAL EXPERTS
ENGINEERED WOOD Flooring
FIREPLACES & HEARTHS
FLOOR TYPES & DEFECTS
FRAMING DETAILS for BETTER INSULATION
FREEZE-PROOF A BUILDING
FROST HEAVES, FOUNDATION, SLAB
HEAT LOSS in BUILDINGS
HOUSE DOCTOR, how-to be
INDOOR AIR QUALITY IMPROVEMENT GUIDE
Insulation Air & Heat Leaks
INSULATION LOCATION - WHERE TO PUT IT
INSULATION R-Values & Properties
LOG HOME GUIDE
MOISTURE CONTROL in BUILDINGS
MOLD: A COMPLETE GUIDE TO MOLD
NOISE / SOUND DIAGNOSIS & CURE
ODORS & SMELLS DIAGNOSIS & CURE
PLASTER, LOOSE FALL HAZARDS
PLASTER TYPE IDENTIFICATION
PLUMBING DRAIN NOISE DIAGNOSIS
PLUMBING NOISE CHECKLIST
ROOF NOISE TRANSMISSION
ROOF VENTILATION SPECIFICATIONS
SLAB CRACK EVALUATION
SOUND CONTROL in buildings
Splits in Structural Wood Beams
STAIRS, RAILINGS, LANDINGS, RAMPS
SUMP PUMPS GUIDE
THERMAL EXPANSION of HOT WATER
THERMAL EXPANSION of MATERIALS
TRUSS UPLIFT, ROOF
VENTILATION in BUILDINGS
WALL FINISHES INTERIOR
WIND WASHING INSULATION At EAVES
WINDOWS & DOORS
WOOD FLOOR DAMAGE
This article discusses methods for controlling sound transmission through building walls. Here we define STC - sound transmission class and we provide a table of design details that show STC rating for various building wall framing designs. Sound transmission reduction wall designs are given for both single stud and staggered double stud structural and partition walls. We include soundproofing suggestions for high noise level areas such as music rooms as well as areas where privacy is a concern such as in counseling and psychotherapy offices.
Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.
This article series discusses noise and sound control in buildings, and includes excerpts or adaptations from Best Practices Guide to Residential Construction, by Steven Bliss, courtesy of Wiley & Sons. How effectively a wall or floor reduces airborne sound is measured by STC ratings (sound transmission class). Roughly speaking, the STC rating equals the reduction in decibel levels across the partition. (see Table 5-15).
So, for example, a 50 dB noise on the other side of an STC 35 wall will sound like a 15 dB noise to the average listener (see our Table of STC ratings and noise reduction left).
Walls and floors in the field often measure lower than in laboratory ratings due to variations in workmanship as well as leaks and bypasses.
The higher the STC rating, the more likely it is to be compromised by site conditions. For that reason, it is best to select a building assembly rated at least 5 points above the design goal.
For even higher sound control ratings, which might be needed for a music room, for example, double doors are required (see Table 5-17 discussed in detail at Cut Off Flanking Sound Paths and at Door Options for Sound Reduction).
For party walls between adjacent living units, STC ratings should be a minimum of 50. Recommended STC levels between bedrooms and adjacent rooms in single family homes and apartments are shown in Table 5-18. Where privacy and quiet are of concern to clients, a minimum STC rating of 45 is a reasonable target for bedroom and bathroom partitions. Closets along a wall can help buffer sounds as long as doors are not louvered.
-- Adapted with permission from Best Practices Guide to Residential Construction.
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