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A Comparison of Methods for Calculating the Loudness Level

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The methods at present in use for calculating the loudness level yield differing results for the same sound spectrum. According to three methods [2], [3], [4] the loudness level is calculated as a function of sound pressure level, band width, center frequency, and slope of the third-octave level diagram, and the results are compared. The differences vary between 0 dB and 10 dB depending on the nature of the sound. The divergences are not methodical. To gain a criterion for the actual (the subjectively perceived) loudness, measurements were made with 12 persons for several sounds which presented especially large differences among the calculated values.
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Document Type: Research Article

Publication date: 01 January 1966

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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