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Open AccessArticle

Handclap for Acoustic Measurements: Optimal Application and Limitations

1
Institute of Computational Mechanics and Optimization (Co.Mec.O), School of Production Engineering and Management, Technical University of Crete, 73100 Chania, Greece
2
Department of Music Technology and Acoustics, Hellenic Mediterranean University, 74100 Rethymno, Greece
*
Author to whom correspondence should be addressed.
Acoustics 2020, 2(2), 224-245; https://doi.org/10.3390/acoustics2020015
Received: 25 March 2020 / Revised: 4 April 2020 / Accepted: 7 April 2020 / Published: 26 April 2020
(This article belongs to the Collection Historical Acoustics)
Handclap is a convenient and useful acoustic source. This study aimed to explore its optimal application and limitations for acoustic measurements as well for other possible utilizations. For this purpose, the following steps were performed: investigation of the optimal hand configuration for acoustic measurements and measurements at different microphone source distances and at different spaces and positions. All measurements were performed with a handclap and a dodecahedron speaker for comparison. The results indicate that the optimal hand configuration (among 11) is with the hands cupped and held at an angle due to the superior low frequency spectrum. This configuration produced usable acoustic parameter measurements in the low frequency range in common room background levels unlike other configurations. The reverberation time was measured across different spaces and positions with a deviation less than three and just a noticeable difference of the signal-to-noise ratio within or near the ISO 3382-1 limits for each corresponding octave band. Other acoustic parameters (i.e., early decay time, clarity) were measured with greater deviations for reasons discussed in the text. Finally, practical steps for measurements with a handclap as an acoustic source are suggested. View Full-Text
Keywords: acoustic measurements; acoustic parameters; impulse response; sound source; reverberation time; ISO 3382; noise compensation method; dodecahedron; just noticeable difference acoustic measurements; acoustic parameters; impulse response; sound source; reverberation time; ISO 3382; noise compensation method; dodecahedron; just noticeable difference
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Papadakis, N.M.; Stavroulakis, G.E. Handclap for Acoustic Measurements: Optimal Application and Limitations. Acoustics 2020, 2, 224-245.

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