Architectural Acoustics by Marshall Long (Auth.)

By Marshall Long (Auth.)

Architectural Acoustics, moment version provides an intensive technical evaluate of the self-discipline, from simple strategies to precise layout suggestion. starting with a short heritage, 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 functional purposes of wave acoustics, sound transmission, vibration and vibration isolation, and noise transmission in flooring and mechanical systems.

Chapters on particular layout difficulties display the best way to observe the speculation, together with remedy of multifamily dwellings, place of work constructions, rooms for speech, rooms for tune, multipurpose rooms, auditoriums, sanctuaries, studios, listening rooms, and the layout of sound reinforcement platforms. distinctive figures illustrate the sensible purposes of acoustic ideas, displaying how one can enforce layout principles in genuine structures.

This compendium of theoretical and useful layout details brings the proper innovations, equations, recommendations, and particular layout difficulties jointly in a single position, together with either basics and extra complex fabric. training engineers will locate it a useful reference for his or her day-by-day paintings, whereas complicated scholars will get pleasure from its rigorous remedy of the elemental construction blocks of acoustical theory.

  • Considered the main whole source within the box - contains uncomplicated basic family members, derived from first ideas, and examples had to resolve actual engineering problems.
  • Provides a well-organized textual content for college students first drawing close the topic in addition to a competent reference for skilled practitioners seeking to refresh their technical wisdom base.
  • New content material for constructing pros contains case experiences and insurance of particular concentration parts comparable to audio visible layout, theaters, and live performance halls.

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Haydn, Mozart, Strauss, Schubert, Liszt, and Beethoven composed and conducted dances and concerts for these rooms, and Beethoven’s Eighth Symphony was first performed here in 1814. It remained Vienna’s premier concert hall until Musikvereinssaal opened in 1870. Meanwhile, in Italy, little had changed. Opera was the center of the cultural world and opera-house design had developed slowly over two centuries. In 1778 Teatro alla Scala opened in Milan and has endured, virtually unchanged, for more than two centuries.

14 shows typical values of the wavelength of sound in air at various frequencies. 3 m (1 ft) while for the lowest note on the piano the wavelength is about 13 m (42 ft). The lowest note on a large pipe organ might be produced by a 10 m (32 ft) pipe that is half the wavelength of the note. The highest frequency audible to humans is about 20,000 Hz and has a wavelength of around half an inch. 1 in) mosquito. Velocity of Sound The mathematical description of the changes in pressure and density induced by a sound wave, called the wave equation, requires that certain assumptions be made about the medium.

3 FUNDAMENTALS OF ACOUSTICS 43 Frequency Spectrum If we were to measure the strength of the sound produced by a particular note and make a plot of sound level versus frequency we would have a graph called a spectrum. When the sound has only one frequency, it is called a pure tone and its spectrum consists of a single straight line, whose height depends on its strength. The spectrum of a piano note, shown in Fig. 4, is a line at the fundamental frequency and additional lines at each harmonic frequency.

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