By Marshall Long (Auth.)

ISBN-10: 0123982588

ISBN-13: 9780123982582

Architectural Acoustics, moment variation offers an intensive technical evaluate of the self-discipline, from simple recommendations to precise layout recommendation. starting with a short background, it studies the basics of acoustics, human notion and response to sound, acoustic noise measurements, noise metrics, and environmental noise characterization. In-depth remedy is given to the theoretical ideas and useful functions of wave acoustics, sound transmission, vibration and vibration isolation, and noise transmission in flooring and mechanical systems.

Chapters on particular layout difficulties exhibit the way to follow the idea, together with therapy of multifamily dwellings, workplace constructions, rooms for speech, rooms for song, multipurpose rooms, auditoriums, sanctuaries, studios, listening rooms, and the layout of sound reinforcement structures. unique figures illustrate the sensible purposes of acoustic ideas, exhibiting tips to enforce layout principles in genuine structures.

This compendium of theoretical and sensible layout details brings the appropriate thoughts, equations, innovations, and particular layout difficulties jointly in a single position, together with either basics and extra complicated fabric. working towards engineers will locate it a useful reference for his or her day-by-day paintings, whereas complex scholars will enjoy its rigorous remedy of the elemental development blocks of acoustical theory.

  • Considered the main entire source within the box - contains uncomplicated basic family, derived from first rules, and examples had to remedy actual engineering problems.
  • Provides a well-organized textual content for college kids first imminent the topic in addition to a competent reference for knowledgeable practitioners seeking to refresh their technical wisdom base.
  • New content material for constructing pros contains case reviews and assurance of particular concentration parts equivalent to audio visible layout, theaters, and live performance halls.

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Additional resources for Architectural Acoustics

Example text

The wide dynamic range of this instrument originally led to its name, the forte (loud) piano (soft), and socially prominent households were expected to have one in the parlor. As musical instruments increased in loudness they could be heard by larger audiences. This in turn encouraged larger concert halls and the use of full orchestras. As performance spaces grew larger there arose an incentive to begin thinking more about their acoustical behavior. 15 Teatro alla Scala, Milan, Italy (Beranek, 2004) 27 28 ARCHITECTURAL ACOUSTICS rectangular ballrooms.

3 SUPERPOSITION OF WAVES Linear Superposition Sometimes a sound is a pure sinusoidal tone, but more often it is a combination of many tones. Even the simple dial tone on a telephone is the sum of two single-frequency tones, 350 and 440 Hz. Our daily acoustical environment is quite complicated, with a myriad of sounds striking our ear drums at any one time. One reason we can interpret these sounds is that they add together in a linear way without creating appreciable distortion. In architectural acoustics, the wave motions we encounter are generally linear; the displacements are small and forces and displacements can be related by a constant.

When the amplitudes are the same, the sum of the two waves is1 ! 30) 2 2 If the two frequencies are close together, a phenomenon known as beats occurs. Since one-half the difference frequency is small, it modulates the amplitude of one-half the sum frequency. 13 shows this effect. We hear the increase and decrease in signal strength of sound, which can be more annoying than a continuous sound. In practice, beats are encountered when two fans or pumps, nominally driven at the same rpm, are located physically close together, sometimes feeding the same duct or pipe in a building.

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Architectural Acoustics by Marshall Long (Auth.)

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