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Subjektive und objektive Bewertung von Maschinengeräuschen

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The same magnetic tape recordings of a great number of noises produced by reciprocating combustion engines served as a basis for the evaluation of noises at two different places (Berlin, Stuttgart) using subjective noise measurements. The total sound pressure level was kept constant at 80 dB (head-phone was calibrated in free field, loudspeaker in free field).

The mean values of the measurements at Berlin and Stuttgart show a standard deviation of 2.4 dB ±2.1 dB.

The objective evaluation was made by measuring the sound levels in dB (A) and dB(B). The loudness was calculated following Zwicker from third octave spectra, and Stevens from the octave spectra. The value calculated according to Zwicker stands closest to the subjective mean values. The evaluation of the octave spectra by limiting curves (NR curves of ISO, “Geräuschstufe” of Lübcke) gives information, which deviates in some cases from the sound level in dB (A).
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Document Type: Research Article

Publication date: January 1, 1964

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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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