ITFT -- Sound and acoustics

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Information about ITFT -- Sound and acoustics
Education

Published on April 26, 2014

Author: ravikaushal50

Source: slideshare.net

Description

building services, sound,acoustics

INTRODUCTION • TO

SOUND ACOUSTICS:- Acoustic is important for creating musical Instruments or concert halls or surround Sound stereo or hearing aids.

• Decibel : the decibel is commonly used in acoustics to quantify sound levels relative to a 0 db reference. • Measuring sound: Sound travels in waves. In solid building materials, it progresses has vibration • Hertz : Sound frequency is measured in hertz, cycles per second.

• Noise reduction coefficient: NRC is most commonly used to rate general acoustical properties of acoustic ceiling tiles, baffles, banners, office screens and acoustic wall panels.

Noise criteria: NC is used to define design goals for the maximum allowable background noise in a given space.

• Absorption coefficient: The sound absorption coefficient describes the ability of a material to scatter or diffuse sound expressed as a fraction of incident sound.

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