Comparison of different experimental methods for the assessment of the room’s acoustics

Ţopa, Marina; Toma, Norbert; Kirei, Botond Sandor; Homana, Ioana; Mey, G. De

doi:10.1134/s1063771011020229

Cited by 8 publications

(8 citation statements)

References 6 publications

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“…However, if the measured room is large and reverberant, smaller deviations are to be expected. A study by Topa et al [75], revealed similar deviation in the low-frequency range for measurements of RT and early decay time (EDT). Also measurements of clarity (C 80 ) and center time (T s ) suffered from great deviations in the whole frequency spectrum.…”

Section: Balloonmentioning

confidence: 76%

“…Studies by Griesinger [71] and Horvat et al [68] have shown that the balloon has poor repeatability. Also, Topa et al [75], in order to evaluate the repeatability of measurements and the effect this has on the acoustic parameters, performed measurements with balloons for the same source and microphone positions. Results for Clarity (C 80 ) revealed differences for the whole frequency range.…”

Section: Balloonmentioning

confidence: 99%

“…In regard to the measurement of acoustic parameters, there are several studies where this matter is addressed [68,[75][76][77][78]. A study by Jambrosic et al [76] showed that for measurements of reverberation time (RT) with the use of a balloon, results will deviate in the low-frequency range in rooms, compared with studies using standard techniques (dodecahedron speaker).…”

Section: Balloonmentioning

confidence: 99%

“…The study concludes that, concerning repeatability, the firecrackers do not guarantee the extraordinary repeatability of techniques based on deterministic signals (MLS and ESS). In order to check the repeatability of measurements with firecrackers and the effect this has on the acoustic parameters, Topa et al [75] performed measurements for the same source and microphone positions. Results for C 80 revealed differences for the lower frequency band.…”

Section: Firecrackermentioning

confidence: 99%

“…In the study it is stated that "average values for EDT were practically identical to those obtained with two other recent techniques" (however the techniques were not identified in the study). Also in a study by Topa et al [75] measurements of acoustic parameters were performed with firecrackers, but they were only compared with measurements performed with balloons.…”

Section: Firecrackermentioning

confidence: 99%

See 4 more Smart Citations

Review of Acoustic Sources Alternatives to a Dodecahedron Speaker

Papadakis

Stavroulakis

2019

Applied Sciences

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An omnidirectional source is required in many acoustic measurements. Commonly a dodecahedron speaker is used but due to various factors (e.g., high cost, transportation difficulties) other acoustic sources are sometimes preferred. In this review, fifteen acoustic source alternatives to a dodecahedron speaker are presented while emphasis is placed on features such as omnidirectionality, repeatability, adequate sound pressure levels, even frequency response, accuracy in measurement of acoustic parameters and fulfillment of ISO 3382-1 source requirements. Some of the alternative acoustic sources have the appropriate features to provide usable results for acoustic measurements, some have acoustic characteristics better than a dodecahedron speaker (e.g., omnidirectionality in the high-frequency range), while some can potentially fulfill the ISO 3382-1 source requirements. Collected data from this review can be used in many areas (e.g., ISO measurements, head-related transfer functions measurements) for the appropriate selection of an acoustic source according to the expected use. Finally, suggestions for uses and future work are given aimed at achieving further advances in this field.

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Section: Balloonmentioning

confidence: 76%

Section: Balloonmentioning

confidence: 99%