RELATIONSHIP BETWEEN SUBJECTIVE PREFERENCE AND THE AUTOCORRELATION FUNCTION OF LEFT AND RIGHT CORTICAL Α-Waves RESPONDING TO THE NOISE-BURST TEMPO

Chen, Chiung Yao; Ryugo, Hiroshi; Ando, Yoichi

doi:10.3130/aija.62.67_2

Cited by 9 publications

(16 citation statements)

References 11 publications

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“…This tendency for a larger t e under the preferred condition is much more significant than the results of previous studies on EEG alpha waves. They studied varying the delay time of a single sound reflection [9,30], the reverberation time of a music sound field [10], and the tempo of a noise burst [29]. The correlation coefficient between averaged t e values and the scale values of subjective preference was 0Á80 at most on previous EEG studies.…”

Section: Resultsmentioning

confidence: 99%

“…This approach provides additional information by elucidating dynamic temporal aspects of neural responses. Some applications of the ACF have indicated its effectiveness for the understanding of EEG and MEG dynamics [9][10][11][29][30][31][32], and the relationship between subjective preference and the ACF factors of MEG alpha waves is demonstrated here. Thus, it is meaningful to use ACF for MEG analysis.…”

Section: Introductionmentioning

confidence: 99%

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Magnetoencephalographic Responses Corresponding to Individual Subjective Preference of Sound Fields

Soeta

Nakagawa

Tonoike

et al. 2002

Journal of Sound and Vibration

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetoencephalographic Responses Corresponding to Individual Subjective Preference of Sound Fields

Soeta

Nakagawa

Tonoike

et al. 2002

Journal of Sound and Vibration

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“…The prediction of whether a reflection will be audible as an echo is not simple. Studies of brain activities in human time perception may reveal the coding in the central nervous system and specialization in the processing of temporal information management [1][2][3][4][5][6] under Weber's Threshold Law, which considers our psychological judgement and accounts for the most relevant characteristics of the decision-making-related neural activity, as confirmed by Deco et al [7]. The objective of this study is to give an integrative approach to the time sense and to focus on the relationship between subjective ITDG differentiation and the responses of the human brain.…”

Section: Introductionmentioning

confidence: 99%

Delving into Hearing Threshold of the Delay Gap of Initial Reflection in a Room by Using the Response of Cortical Brainwaves

Chen

2023

Applied Sciences

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In this study, the apparent variation ranges of acoustical parameters were investigated in a concert hall. The initial time delay gap (ITDG) was evaluated in terms of its just noticeable difference (JND) through two instruments, the cello and the trumpet. Even though the IDTG values were prolonged over the measurements and were not significantly varied, an ITDG range of 22–220 ms in increments of 91 steps was produced electro-acoustically in an anechoic chamber. The result of JNDc (Δgap/gap) was rated by 50% “different” judgement ranges for the cello and trumpet tracks, respectively. The effective duration of the autocorrection function (ACF) of the continuous brainwaves (CBWs) within the alpha (8–13 Hz) frequency range in the left hemisphere responding to 91-step ITDG increments revealed that the continuous ratios of τe_min ((τe_min_rear − τe_min_front)/τe_min_front) of CBWs were constantly on the trumpet. Furthermore, a homologous period of resonance between the subjective JNDc and τe values of the ACF of CBWs in the alpha range allowed us to conclude that the subjective JND of the ITDG in a room was related to the W_IACC value of the interaural cross-correlation function, which reflected the characteristics of source signals themselves and aroused the activities of the brain in the right hemisphere (p < 0.01). The dry sources of sound stimuli were first used to link the psychological preference and the neurophysiological activation of the room acoustics.

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“…Review i) The autocorrelation function of CBW in the a-wave rangeA number of studies has comfirmed that the effective duration (L'e) of autocorrelation function (ACF), in a-waves range of continuous brain waves (CBW) well correlates to the scale values (SVs) of subjective preference in changing of the delay time of the single reflection (L1t1)' the subsequence reverberation time (T sub ) or the noise-burst periods for a sound field(Ando & Chen [31]; Chen & Ando[32]; Chen, Ryugo & Ando[33]). Typical findings have included the following:…”

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confidence: 99%

Analyses of cortical continuous brain waves in relation to subjective preference of physical environments

Chen¹

1998

The Journal of the Acoustical Society of America

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The living environment is composed of elements involving spatial and temporal factors.The spatial standards were frequently employed to design as knowledge, but the temporal standard was not clear, and there was few theory formally adopted pertinently. Nevertheless, the temporal factors are obviously concerned with activity in the left cerebral hemisphere, in accordance with physical environment changes. Here, it was objectively led this phenomenon further. For sound fields, four independent physical factors were prevailing for designing a sound field: (1) the initial time delay gap between the direct sound and the first reflection, tot1; (2) the subsequence reverberation time, Tsub; (3) the level of listening, LL; and (4) the magnitude of interaural cross-correlation (lACC). In particular, the first two factors have been composed of a standard of time. The subjective preference theory was effectively applied for the planning of a few music halls. As far as the temporal factors are concerned, the preference of sound fields can be calculated by autocorrelation function of sound source signal together with such temporal factors. But it is weakness for subjective evaluation in general living environments entirely obtained by questionnaire using "language". Therefore, a method for measuring a human being's brain responses to external sound stimuli was arranged. The aim of present study was to identify the relationship between the subjective preference and the brain responses corresponding to the temporal variation. The method applied here is to analyze the autocorrelation function of continuous brain waves (CBW) in the awave range and extend this relationship for a visual environment that trying to approach for all conditions. , Up to present, CBW were reported by the wave type or the frequency variation, it is inadequacy to observe following a variation of temporal occasion. The "effective duration" ("t e ) was defined by the effective gap of the initial deduction (0.1 envelope) of the autocorrelation function (ACF) in the a-wave range; it involves a 2.5 s linear integral sum to correspond well to the stimulation by considering "psychological present".Chapter I states an important theory of subjective judgement, a theory that gives us a concept of the relationship between subjective preference and the autocorrelation function of brain waves.Chapter II optimizes a stimulation system (paired-comparison system) and the analyses ofACF of brain waves in the a-wave range by changing the btl of a music sound field (Motif B: Arnold's Sinfornietta, Opus 48) to 35 ms and 245 ms. Results show that the effective duration ofACF ("t e ) of CBW in the a-wave range correlates well to the subjective preference in a 2.5 s segment corresponding to the "psychological present". Furthermore, the values of "t e in the a-wave range correspond efficiently to the subjective preference and prolongs when the preference score increases. The EEG channel T3 is a forcible recording for detecting the temporal variation in brain by comparing with T4...

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RELATIONSHIP BETWEEN SUBJECTIVE PREFERENCE AND THE AUTOCORRELATION FUNCTION OF LEFT AND RIGHT CORTICAL Α-Waves RESPONDING TO THE NOISE-BURST TEMPO

Cited by 9 publications

References 11 publications

Magnetoencephalographic Responses Corresponding to Individual Subjective Preference of Sound Fields

Magnetoencephalographic Responses Corresponding to Individual Subjective Preference of Sound Fields

Delving into Hearing Threshold of the Delay Gap of Initial Reflection in a Room by Using the Response of Cortical Brainwaves

Analyses of cortical continuous brain waves in relation to subjective preference of physical environments

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