Sound Analysis and Optimisation of Product Design Household appliances and consumer products should aim to be exceptionally quiet while delivering high-quality product. Acoustic measurement methods are therefore used both in…
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The basic procedure of how to calibrate microphones is described in IEC 61094. This standard describes two methods of measurement: by sound pressure and by free field. Free field is the…
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ISO 532-1:2017 – Acoustics – Methods for Calculating Loudness – Part 1: Zwicker Method ISO 532-1:2017 specifies two methods for estimating the loudness and loudness level of sounds as perceived…
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Data obtained at Bell Labs by Kingsbury (1927) was the earliest to be used to generate loudness contour. For many years, contours reported by Fletcher and Munson (1933) were…
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[caption id="attachment_11084" align="alignnone" width="937"] Gustav Fechner (1801-1887), “Father of Psychophysics.”[/caption] Psychoacoustics is the branch of psychophysics involving the scientific study of sound perception. It is the branch of science studying…
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How should environmental sound be characterised? An environmental sound is non-speech and is not a in the context of sine tone, pink noise, or white noise often used in…
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Geneva, March 31, 2021. The ALPHA collaboration at CERN has successfully cooled antihydrogen atoms, the simplest form of atomic antimatter, using lasers. This technique, known as laser cooling, was…
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In many countries, long, dark winters limit the amount of solar energy that can be generated for much of the year. That's where the Underground Sun Conversion system comes in,…
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