NOISE CONTROL OF BUILDINGS, Introduction 2) Noise and Health 3) Ways to Control 4) Methods to control 5) Room Acoustic 6) Wall Construction 7) Floor construction 8) Space Planning

 

NOISE CONTROL OF BUILDINGS

CONTENT

1)    Introduction

2)    Noise and Health

3)    Ways to Control

4)    Methods to control

5)    Room Acoustic

6)    Wall Construction

7)    Floor construction

8)    Space Planning

INTRODUCTION

Ø  The century of development and immense noise.

Ø  24/7 surrounded by noise and sound.

Ø  Principle: conversion of disturbances into electrical potentials which the brain can sense.

Ø  Noise from outdoor as well as within the house.
NOISE: UNWANTED SOUND

Ø  Noise can impede speech communication.

Ø  The solution can be noise control.

NOISE AND HEALTH

Regular exposure to noise may include various physical and psychological health consequences including:
▪ Hearing Impairment
▪ Tinnitus
▪ Hypertension
▪ Ischemic heart disease
▪ Annoyance
▪ Sleep disturbances
▪ Harm to Immune System
▪ Birth defects
▪ Increased incidence of diabetes

WAYS TO CONTROL

Three BASIC ways to control noise

1.     Replace the sound source with a quieter one.

2.     Block the sound with a solid, heavy material that resists the transmission of sound waves.

3.     Absorb the sound with a light, porous material that soaks up sound waves.

Acoustical design issues for buildings include site noise considerations, control of noise transfer, establishing noise standards, room acoustics considerations, sound isolation, vibration control, and audio/visual considerations.

m                                                                 METHODS

                                                   

ROOM ACOUSTICS

                                      

WALL CONSTRUCTION

Standard partition is a single stud wall and one layer of gypsum board on each side, the acoustic performance can be improved by using light gauge metals instead of wood studs. STC (Sound transmission class) is a standard parameter to compare the performance of different construction materials.

SPACE PLANNING

Space planning deals with organizing spaces to avoid adverse adjacencies of noisy equipment like mechanical equipment and electrical transformer with quiet spaces . It can be the most cost-effective noise control technique.

FLOOR CONSTRUCTION

Floor and ceiling provide two acoustical function:

1.     provide separation between adjacent spaces i.e, airborne sound insulation

2.     reduces the sound of footfalls and other impact sounds i.e, impact insulation.
Using a carpet and a pad or a resilient floor underlayment improves impact insulation.