Effect of Head Orientation on Speech Directivity

Bellows, Samuel D.; Leishman, Timothy W.

doi:10.21437/interspeech.2022-553

Cited by 6 publications

(7 citation statements)

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“…The effect is most pronounced for the phoneme /o/, although strongly visible in /i/ and /m/ as well. Multiple lobes above 1 kHz also appear also in the results of [12,25].…”

Section: Resultsmentioning

confidence: 61%

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Combining multiple sparse measurements with reference data regularization to create spherical directivities applied to voice data

Bellows,

Katz

2024

Acta Acust.

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Obtaining high-resolution, spherical phoneme-dependent directivities for voice radiation is beneficial for numerous acoustics applications. This work reports on a spherical interpolation method based on two interleaved measurements using a regularized least-squares fit with reference data. Maximizing the spherical correlation between previously reported results and measured data determines the regularization hyper-parameters to ensure physical solutions. While the resultant spherical directivity patterns show similarities to time-averaged results, distinct radiation characteristics appear, particularly in the range of 630 Hz to 2 kHz.

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“…The effect is most pronounced for the phoneme /o/, although strongly visible in /i/ and /m/ as well. Multiple lobes above 1 kHz also appear also in the results of [12,25].…”

Section: Resultsmentioning

confidence: 61%

“…Figure 5 demonstrates convergence over N for fixed k for the case of the vowel /a/ at the 1.6 kHz 1/3rd octave band. For a fixed value of k = 0.5, a directivity factor function deviation level L Q [25]…”

Section: Hyper-parameter Tuningmentioning

confidence: 99%

Combining multiple sparse measurements with reference data regularization to create spherical directivities applied to voice data

Bellows,

Katz

2024

Acta Acust.

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“…For the exact naming scheme, please refer to the documentation of the dataset [9]. The data can be converted to UNF (used by Ulysses 6 ) and the CLF/CIF format (used by ODEON 7 and CATT-Acoustic 8 ) using the proprietary SpeakerLab 9 software from AFMG.…”

Section: Gll One-third-octave Band Firsmentioning

confidence: 99%

“…The inherent problem of the repeatability of the notes played was partially corrected by using the spectral distribution of the notes at a reference microphone, which allowed the correction of deviations in timbre but not those caused by the movements of the musicians. These directivities are freely available in onethird-octave resolution [7], while the recorded individual notes are not published as such.…”

Section: Introductionmentioning

confidence: 99%

A Database with Directivities of Musical Instruments

Ackermann,

Brinkmann,

Weinzierl

2024

J. Audio Eng. Soc.

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This article presents a database of recordings and radiation patterns of individual notes for 41 modern and historical musical instruments, measured with a 32-channel spherical microphone array in anechoic conditions. In addition, directivities averaged in one-third-octave bands have been calculated for each instrument, which are suitable for use in acoustic simulation and auralization. The data are provided in Spatially Oriented Format for Acoustics. Spatial upsampling of the directivities was performed based on spherical spline interpolation and converted to OpenDAFF and Generic Loudspeaker Library formats for use in room acoustic and electro-acoustic simulation software. For this purpose, a method is presented for how these directivities can be referenced to a specific microphone position in order to achieve a physically correct auralization without coloration. The data is available under the CC BY-NC 4.0 license.

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“…Radiation from the human voice is also an interesting case study because sound predominately originates from the mouth, which is significantly smaller than the entire body. Although torso diffraction strongly influences voice directivities [34], it is common to simulate voice radiation using only an isolated mannikin head. These differences lead to an ambiguity of whether the effective source radius R s should incorporate the entire body or just the head.…”

Section: Speechmentioning

confidence: 99%

A Spherical-Harmonic-Based Framework for Spatial Sampling Considerations of Musical Instrument and Voice Directivity Measurements

Bellows,

Leishman

2022

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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Researchers have employed numerous array configurations and sampling densities to thoroughly measure the sound radiations of live sources, such as musical instruments and speech. The number of sampling positions has varied from fewer than a hundred to over a thousand, with measurement inconsistencies highlighting a knowledge gap in the number of sampling positions required for spherical directivity measurements. This work presents theoretical methods and practical metrics to assess the required number of sampling positions for a given source to mitigate spatial aliasing. Theoretical developments show that the number of necessary sampling positions closely relates to source geometry due to the spatial filtering effects of far-field propagation. Initial results from theoretical models generalize the approach to live sources.

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Effect of Head Orientation on Speech Directivity

Cited by 6 publications

References 0 publications

Combining multiple sparse measurements with reference data regularization to create spherical directivities applied to voice data

Combining multiple sparse measurements with reference data regularization to create spherical directivities applied to voice data

A Database with Directivities of Musical Instruments

A Spherical-Harmonic-Based Framework for Spatial Sampling Considerations of Musical Instrument and Voice Directivity Measurements

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