Testing of a Device for Positioning Measuring Microphones in Anechoic and Reverberation Chambers

Felis, Józef; Flach, Artur; Kamisiński, Tadeusz

doi:10.2478/v10168-012-0032-5

Cited by 11 publications

(7 citation statements)

References 4 publications

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“…4). The sound source was located 4 m above a sample and the position of a microphone changed from an angle 0 to 90 degrees (Felis et al, 2012;Batko et al, 2008). The tested samples were rectangular in plan and had two or four edges curved with varied radii (Figs.…”

Section: Methodsmentioning

confidence: 99%

The Characteristic of Sound Reflections from Curved Reflective Panels

Szeląg¹,

Kamisiński²,

Lewińska³

et al. 2015

Archives of Acoustics

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The paper presents the verification of a solution to the narrow sound frequency range problem of flat reflective panels. The analytical, numerical and experimental studies concerned flat panels, panels with curved edges and also semicircular elements. There were compared the characteristics of sound reflected from the studied elements in order to verify which panel will provide effective sound reflection and also scattering in the required band of higher frequencies, i.e. above the upper limit frequency. Based on the conducted analyzes, it was found that among some presented solutions to narrow sound frequency range problem, the array composed of panels with curved edges is the most preferred one. Nevertheless, its reflection characteristic does not meet all of the requirements, therefore, it is necessary to search for another solution of canopy which is effective over a wide frequency range.

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Section: Methodsmentioning

confidence: 99%

The Characteristic of Sound Reflections from Curved Reflective Panels

Szeląg¹,

Kamisiński²,

Lewińska³

et al. 2015

Archives of Acoustics

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“…A round test sample was mounted on the turntable in the reverberation chamber (Felis et al, 2012). The height of the measurement table was 130 mm.…”

Section: Testing Proceduresmentioning

confidence: 99%

Test Signal Selection for Determining the Sound Scattering Coefficient in a Reverberation Chamber

Kamisiński¹,

Brawata²,

Pilch³

et al. 2012

Archives of Acoustics

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The paper focuses on the problem of test signal selection in determining the sound scattering coefficient in accordance with ISO 17497-1. Research shows that the use of MLS signal is preferred in this procedure. The sine sweep signal, despite its advantages, presents certain limitations if the sample is moving during measurement. An attempt has been made to develop a method that allows for minimization of error, demonstrating the dependence of the obtained values of the sound scattering coefficient on the rotational speed of the turntable and type of test signal. Conditions for the application of the sine sweep signals in continuous and discrete measurements were defined.

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“…Total length of recordings amounts to 4 h and 30 min. The quality of the recordings is proper, as they were made in an anechoic chamber with high-end recording devices (Felis et al 2012). Original recordings were sampled at 44.1 kHz to meet the expectations of speech synthesis, but for the purpose of ASR training and tests, we also prepared a downsampled 16 kHz version with the use of SoX software.…”

Section: Tts Training Corpusmentioning

confidence: 99%

AGH corpus of Polish speech

Żelasko

Ziółko

Jadczyk

et al. 2015

Lang Resources & Evaluation

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A corpus of Polish speech, which has been collected for the purpose of automatic speech recognition (ASR) and text-to-speech (TTS) systems applications, is presented. The corpus consists of several groups of recordings: read sentences, spoken commands, a phonetically balanced TTS training corpus, telephonic speech and others. In summary duration of recordings is above 25 h. Number of unique speakers amounts to 166. The majority of them being in an age group of 20-35 and one third of them being female. Analysis of unique word occurrence frequency in relation to larger text resources has been concluded. From them, most commonly appearing words have been found and presented. The corpus was used as training data for the ASR system. Results of cross-validation training and testing the SARMATA ASR system using our corpus have shown that phrase recognition rate is 91.9 %.

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Testing of a Device for Positioning Measuring Microphones in Anechoic and Reverberation Chambers

Cited by 11 publications

References 4 publications

The Characteristic of Sound Reflections from Curved Reflective Panels

The Characteristic of Sound Reflections from Curved Reflective Panels

Test Signal Selection for Determining the Sound Scattering Coefficient in a Reverberation Chamber

AGH corpus of Polish speech

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